Author: "Pickersgill, Annemarie E." - Searchworks@Jio Institute Digital Library Search Results

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1. Shock effects in feldspars: An overview

Author: Pickersgill*, Annemarie E., primary, Jaret, Steven J., additional, Pittarello, Lidia, additional, Fritz, Jörg, additional, and Harris, R. Scott, additional
Published: 2021
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2. Rapid recovery of life at ground zero of the end-Cretaceous mass extinction

Author: Lowery, Christopher M., Bralower, Timothy J., Owens, Jeremy D., Rodríguez-Tovar, Francisco J., Jones, Heather, Smit, Jan, Whalen, Michael T., Claeys, Phillipe, Farley, Kenneth, Gulick, Sean P. S., Morgan, Joanna V., Green, Sophie, Chenot, Elise, Christeson, Gail L., Cockell, Charles S., Coolen, Marco J. L., Ferrière, Ludovic, Gebhardt, Catalina, Goto, Kazuhisa, Kring, David A., Lofi, Johanna, Ocampo-Torres, Rubén, Perez-Cruz, Ligia, Pickersgill, Annemarie E., Poelchau, Michael H., Rae, Auriol S. P., Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, Honami, Tikoo, Sonia M., Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Vellekoop, Johan, Wittmann, Axel, Xiao, Long, Yamaguchi, Kosei E., and Zylberman, William
Published: 2018
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3. Revisiting the Gow Lake impact structure, Saskatchewan, Canada

Author: Osinski, Gordon R., primary, Coulter, Adam B., additional, Flemming, Roberta L., additional, Ozaruk, Alexandra, additional, Pickersgill, Annemarie E., additional, and Singleton, Alaura C., additional
Published: 2023
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4. The Winchcombe meteorite, a unique and pristine witness from the outer solar system

Author: King, Ashley J, Daly, Luke, Rowe, James, Joy, Katherine H, Greenwood, Richard C, Devillepoix, Hadrien AR, Suttle, Martin D, Chan, Queenie HS, Russell, Sara S, Bates, Helena C, Bryson, James FJ, Clay, Patricia L, Vida, Denis, Lee, Martin R, O'Brien, Áine, Hallis, Lydia J, Stephen, Natasha R, Tartèse, Romain, Sansom, Eleanor K, Towner, Martin C, Cupak, Martin, Shober, Patrick M, Bland, Phil A, Findlay, Ross, Franchi, Ian A, Verchovsky, Alexander B, Abernethy, Feargus AJ, Grady, Monica M, Floyd, Cameron J, Van Ginneken, Matthias, Bridges, John, Hicks, Leon J, Jones, Rhian H, Mitchell, Jennifer T, Genge, Matthew J, Jenkins, Laura, Martin, Pierre-Etienne, Sephton, Mark A, Watson, Jonathan S, Salge, Tobias, Shirley, Katherine A, Curtis, Rowan J, Warren, Tristram J, Bowles, Neil E, Stuart, Finlay M, Di Nicola, Luigia, Györe, Domokos, Boyce, Adrian J, Shaw, Kathryn MM, Elliott, Tim, Steele, Robert CJ, Povinec, Pavel, Laubenstein, Matthias, Sanderson, David, Cresswell, Alan, Jull, Anthony JT, Sýkora, Ivan, Sridhar, Sanjana, Harrison, Richard J, Willcocks, Francesca M, Harrison, Catherine S, Hallatt, Daniel, Wozniakiewicz, Penny J, Burchell, Mark J, Alesbrook, Luke S, Dignam, Aishling, Almeida, Natasha V, Smith, Caroline L, Clark, Brett, Humphreys-Williams, Emma R, Schofield, Paul F, Cornwell, Luke T, Spathis, Vassilia, Morgan, Geraint H, Perkins, Mark J, Kacerek, Richard, Campbell-Burns, Peter, Colas, Francois, Zanda, Brigitte, Vernazza, Pierre, Bouley, Sylvain, Jeanne, Simon, Hankey, Mike, Collins, Gareth S, Young, John S, Shaw, Clive, Horak, Jana, Jones, Dave, James, Nick, Bosley, Steve, Shuttleworth, Alan, Dickinson, Paul, McMullan, Ian, Robson, Derek, Smedley, Andrew RD, Stanley, Ben, Bassom, Richard, McIntyre, Mark, Suttle, Adam A, Fleet, Richard, Bastiaens, Luc, Ihász, Míra B, McMullan, Sarah, Boazman, Sarah J, Dickeson, Zach I, Grindrod, Peter M, Pickersgill, Annemarie E, Weir, Colin J, Suttle, Fiona M, Farrelly, Sarah, Spencer, Ieun, Naqvi, Sheeraz, Mayne, Ben, Skilton, Dan, Kirk, Dan, Mounsey, Ann, Mounsey, Sally E, Mounsey, Sarah, Godfrey, Pamela, Bond, Lachlan, Bond, Victoria, Wilcock, Cathryn, Wilcock, Hannah, Wilcock, Rob, King, Ashley J [0000-0001-6113-5417], Daly, Luke [0000-0002-7150-4092], Joy, Katherine H [0000-0003-4992-8750], Greenwood, Richard C [0000-0002-5544-8027], Devillepoix, Hadrien AR [0000-0001-9226-1870], Suttle, Martin D [0000-0001-7165-2215], Chan, Queenie HS [0000-0001-7205-8699], Russell, Sara S [0000-0001-5531-7847], Bates, Helena C [0000-0002-0469-9483], Bryson, James FJ [0000-0002-5675-8545], Vida, Denis [0000-0003-4166-8704], Lee, Martin R [0000-0002-6004-3622], O'Brien, Áine [0000-0002-2591-7902], Hallis, Lydia J [0000-0001-6455-8415], Stephen, Natasha R [0000-0003-3952-922X], Tartèse, Romain [0000-0002-3490-9875], Sansom, Eleanor K [0000-0003-2702-673X], Towner, Martin C [0000-0002-8240-4150], Cupak, Martin [0000-0003-2193-0867], Shober, Patrick M [0000-0003-4766-2098], Bland, Phil A [0000-0002-4681-7898], Findlay, Ross [0000-0001-7794-1819], Franchi, Ian A [0000-0003-4151-0480], Verchovsky, Alexander B [0000-0002-3532-5003], Abernethy, Feargus AJ [0000-0001-7210-3058], Grady, Monica M [0000-0002-4055-533X], Floyd, Cameron J [0000-0001-5986-491X], Van Ginneken, Matthias [0000-0002-2508-7021], Bridges, John [0000-0002-9579-5779], Hicks, Leon J [0000-0002-2464-0948], Jones, Rhian H [0000-0001-8238-9379], Mitchell, Jennifer T [0000-0002-5922-2463], Genge, Matthew J [0000-0002-9528-5971], Jenkins, Laura [0000-0003-0886-8667], Martin, Pierre-Etienne [0000-0003-1848-9695], Sephton, Mark A [0000-0002-2190-5402], Watson, Jonathan S [0000-0003-0354-1729], Salge, Tobias [0000-0002-4414-4917], Shirley, Katherine A [0000-0003-0669-7497], Curtis, Rowan J [0000-0002-9554-3053], Warren, Tristram J [0000-0003-3877-0046], Bowles, Neil E [0000-0001-5400-1461], Stuart, Finlay M [0000-0002-6395-7868], Di Nicola, Luigia [0000-0002-7596-474X], Györe, Domokos [0000-0003-4438-8361], Boyce, Adrian J [0000-0002-9680-0787], Shaw, Kathryn MM [0000-0002-3847-9382], Elliott, Tim [0000-0002-0984-0191], Steele, Robert CJ [0000-0003-1406-6855], Povinec, Pavel [0000-0003-0275-794X], Laubenstein, Matthias [0000-0001-5390-4343], Sanderson, David [0000-0002-9615-4412], Cresswell, Alan [0000-0002-5100-8075], Jull, Anthony JT [0000-0002-4079-4947], Sýkora, Ivan [0000-0003-3447-5621], Sridhar, Sanjana [0000-0003-1179-2093], Harrison, Richard J [0000-0003-3469-762X], Willcocks, Francesca M [0000-0002-3726-0258], Hallatt, Daniel [0000-0002-4426-9891], Wozniakiewicz, Penny J [0000-0002-1441-4883], Burchell, Mark J [0000-0002-2680-8943], Alesbrook, Luke S [0000-0001-9892-281X], Dignam, Aishling [0000-0001-5408-9061], Almeida, Natasha V [0000-0003-4871-8225], Smith, Caroline L [0000-0001-7005-6470], Humphreys-Williams, Emma R [0000-0002-1397-5785], Schofield, Paul F [0000-0003-0902-0588], Cornwell, Luke T [0000-0003-1428-2160], Spathis, Vassilia [0000-0002-5745-4383], Morgan, Geraint H [0000-0002-7580-6880], Campbell-Burns, Peter [0000-0001-8544-728X], Zanda, Brigitte [0000-0002-4210-7151], Vernazza, Pierre [0000-0002-2564-6743], Bouley, Sylvain [0000-0003-0377-5517], Collins, Gareth S [0000-0002-6087-6149], Young, John S [0000-0001-6583-7643], Horak, Jana [0000-0002-0492-2235], Jones, Dave [0000-0002-7215-0521], Bosley, Steve [0000-0002-9478-8518], Dickinson, Paul [0000-0003-0078-0919], McMullan, Ian [0000-0002-5579-8115], Robson, Derek [0000-0001-7807-9853], Smedley, Andrew RD [0000-0001-7137-6628], McIntyre, Mark [0000-0002-5769-4280], Suttle, Adam A [0000-0002-6075-976X], Fleet, Richard [0000-0002-8366-7673], McMullan, Sarah [0000-0002-7194-6317], Boazman, Sarah J [0000-0003-4694-0818], Dickeson, Zach I [0000-0001-9116-2571], Grindrod, Peter M [0000-0002-0934-5131], Pickersgill, Annemarie E [0000-0001-5452-2849], Suttle, Fiona M [0000-0003-1970-0034], Wilcock, Cathryn [0000-0001-7731-2860], Wilcock, Hannah [0000-0002-1043-2267], Wilcock, Rob [0000-0001-8977-7956], Apollo - University of Cambridge Repository, Science and Technology Facilities Council (STFC), and University of St Andrews. School of Earth & Environmental Sciences
Subjects: MCC, QC Physics, Multidisciplinary, 5101 Astronomical Sciences, NDAS, QB Astronomy, 37 Earth Sciences, 3705 Geology, 5109 Space Sciences, 51 Physical Sciences, QC, QB
Abstract: Funding: This study was supported by urgency funding from the U.K.’s Science and Technology Facilities Council (STFC) as part of the project “Curation and Preliminary Examination of the Winchcombe Carbonaceous Chondrite Fall.” Additional work was funded by STFC through grants ST/N000846/1, ST/T002328/1, ST/T506096/1, and ST/W001128/1 (to L.D., M.R.L., and L.J.Ha.); ST/V000675/1 (to K.H.J. and R.H.J.); ST/P005225/1 (to R.T.); ST/S000348/1 (to M.V.G., P.J.W., and M.J.B.); ST/R00143X/1 (to J.B. and L.J.Hi.); ST/S000615/1 (to G.S.C.); ST/V000799/1 (to P.G.); and ST/V000888/1 (to T.E.). A.J.K. and H.C.B. acknowledge funding support from UK Research and Innovation (UKRI) grant MR/T020261/1. P.L.C. acknowledges funding support from UKRI grant MR/S03465X/1. K.H.J. acknowledges funding support from the Royal Society, grant URF\R\201009. L.J.Ha. and M.R.L. acknowledge funding from Natural Environment Research Council (NERC) National Environmental Isotope Facility (NEIF) grant no. 2406.0321. L.D., M.R.L., and L.J.Ha. acknowledge COVID-19 funding support from the University of Glasgow, UK. D.V. was supported in part by NASA cooperative agreement 80NSSC21M0073. P.P. and I.Sy. acknowledge funding from the VEGA agency, project no.1/0421/20. A.J.T.J. acknowledges support from the European Union and the State of Hungary, cofinanced by the European Regional Development Fund in the project of GINOP-2.3.2-15-2016-00009 “ICER.” P.M.S. acknowledges support from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 945298. FRIPON was initiated by funding from ANR (grant N.13-BS05-0009-03), carried out by the Paris Observatory, Muséum National d’Histoire Naturelle, Paris-Saclay University, and Institut Pythéas (LAM-CEREGE). FRIPON data are hosted and processed at Institut Pythéas SIP (Service Informatique Pythéas). The Desert Fireball Network team and Global Fireball Observatory are funded by the Australian Research Council (DP200102073). Direct links between carbonaceous chondrites and their parent bodies in the solar system are rare. The Winchcombe meteorite is the most accurately recorded carbonaceous chondrite fall. Its pre-atmospheric orbit and cosmic-ray exposure age confirm that it arrived on Earth shortly after ejection from a primitive asteroid. Recovered only hours after falling, the composition of the Winchcombe meteorite is largely unmodified by the terrestrial environment. It contains abundant hydrated silicates formed during fluid-rock reactions, and carbon- and nitrogen-bearing organic matter including soluble protein amino acids. The near-pristine hydrogen isotopic composition of the Winchcombe meteorite is comparable to the terrestrial hydrosphere, providing further evidence that volatile-rich carbonaceous asteroids played an important role in the origin of Earth's water. Publisher PDF
Published: 2022

5. Impact Earth: A review of the terrestrial impact record

Author: Osinski, Gordon R., Grieve, Richard A.F., Ferrière, Ludovic, Losiak, Ania, Pickersgill, Annemarie E., Cavosie, Aaron J., Hibbard, Shannon M., Hill, Patrick J.A., Bermudez, Juan Jaimes, Marion, Cassandra L., Newman, Jennifer D., and Simpson, Sarah L.
Subjects: General Earth and Planetary Sciences
Abstract: Over the past few decades, it has become increasingly clear that the impact of interplanetary bodies on other planetary bodies is one of the most ubiquitous and important geological processes in the Solar System. This impact process has played a fundamental role throughout the history of the Earth and other planetary bodies, resulting in both destructive and beneficial effects. The impact cratering record of Earth is critical to our understanding of the processes, products, and effects of impact events. In this contribution, we provide an up-to-date review and synthesis of the impact cratering record on Earth. Following a brief history of the Impact Earth Database (available online at http://www.impactearth.com), the definition of the main categories of impact features listed in the database, and an overview of the impact cratering process, we review and summarize the required evidence to confirm impact events. Based on these definitions and criteria, we list 188 hypervelocity impact craters and 13 impact craters (i.e., impact sites lacking evidence for shock metamorphism). For each crater, we provide details on key attributes, such as location, date confirmed, erosional level, age, target properties, diameter, and an overview of the shock metamorphic effects and impactites that have been described in the literature. We also list a large number of impact deposits, which we have classified into four main categories: tektites, spherule layers, occurrences of other types of glass, and breccias. We discuss the challenges of recognizing and confirming impact events and highlight weaknesses, contradictions, and inconsistencies in the literature.\ud \ud We then address the morphology and morphometry of hypervelocity impact craters. Based on the Impact Earth Database, it is apparent that the transition diameter from simple to complex craters for craters developed in sedimentary versus crystalline target rocks is less pronounced than previously reported, at approximately 3 km for both. Our analysis also yields an estimate for stratigraphic uplift of 0.0945D0.6862, which is lower than previous estimates. We ascribe this to more accurate diameter estimates plus the variable effects of erosion. It is also clear that central topographic peaks in terrestrial complex impact craters are, in general, more subdued than their lunar counterparts. Furthermore, a number of relatively well-preserved terrestrial complex impact structures lack central peaks entirely. The final section of this review provides an overview of impactites preserved in terrestrial hypervelocity impact craters. While approximately three quarters of hypervelocity impact craters on Earth preserve some portion of their crater-fill impactites, ejecta deposits are known from less than 10%. In summary, the Impact Earth Database provides an important new resource for researchers interested in impact craters and the impact cratering process and we welcome input from the community to ensure that the Impact Earth website (http://www.impactearth.com) is a living resource that is as accurate and as up-to-date, as possible.
Published: 2022

6. Impact-generated hydrothermal systems on Earth and Mars

Author: Osinski, Gordon R., Tornabene, Livio L., Banerjee, Neil R., Cockell, Charles S., Flemming, Roberta, Izawa, Matthew R.M., McCutcheon, Jenine, Parnell, John, Preston, Louisa J., Pickersgill, Annemarie E., Pontefract, Alexandra, Sapers, Haley M., and Southam, Gordon
Published: 2013
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7. Shock-deformed zircon from the Chicxulub impact crater and implications for cratering process

Author: Zhao, Jiawei, Xiao, Long, Xiao, Zhiyong, Morgan, Joanna, Osinski, Gordon, Neal, Clive, Gulick, Sean P.S., Riller, Ulrich, Claeys, Philippe, Zhao, Shanrong, Prieur, Nils, Nemchin, Alexander, Yu, Shuoran, Chenot, Elise, Christeson, Gail l., Cockell, Charles S., Coolen, Marco J.L., Ferrière, Ludovic, Gebhardt, Catalina, Goto, Kazuhisa, Jones, Heather, Kring, David A., LOFI, Johanna, Lowery, Christopher M., OCAMPO-TORRES, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E., Poelchau, Michael H., Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Sato, Honami, Smit, Jan, Tikoo-Schantz, Sonia M., Tomioka, Naotaka, Urrutia Fucugauchi, Jaime, Whalen, Michael T., Wittmann, Axel, Yamaguchi, Kosei E., Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Natural Environment Research Council (NERC), Analytical, Environmental & Geo-Chemistry, Earth System Sciences, and Chemistry
Subjects: Geochemistry & Geophysics, Reidite, 010504 meteorology & atmospheric sciences, 04 Earth Sciences, Geology, zircon, 010502 geochemistry & geophysics, 01 natural sciences, Shock (mechanics), Shock metamorphism, Impact crater, 13. Climate action, [SDU]Sciences of the Universe [physics], Scientific method, microstructures, shock metamorphism, Petrology, Cratering, 0105 earth and related environmental sciences, Zircon
Abstract: International audience; Large impact structures with peak rings are common landforms across the solar system, and their formation has implications for both the interior structure and thermal evolution of planetary bodies. Numerical modeling and structural studies have been used to simulate and ground truth peak-ring formative mechanisms, but the shock metamorphic record of minerals within these structures remains to be ascertained. We investigated impact-related microstructures and high-pressure phases in zircon from melt-bearing breccias, impact melt rock, and granitoid basement from the Chicxulub peak ring (Yucatán Peninsula, Mexico), sampled by the International Ocean Discovery Program (IODP)/International Continental Drilling Project (IODP-ICDP) Expedition 364 Hole M0077A. Zircon grains exhibit shock features such as reidite, zircon twins, and granular zircon including “former reidite in granular neoblastic” (FRIGN) zircon. These features record an initial high-pressure shock wave (>30 GPa), subsequent relaxation during the passage of the rarefaction wave, and a final heating and annealing stage. Our observed grain-scale deformation history agrees well with the stress fields predicted by the dynamic collapse model, as the central uplift collapsed downward-then-outward to form the peak ring. The occurrence of reidite in a large impact basin on Earth represents the first such discovery, preserved due to its separation from impact melt and rapid cooling by the resurging ocean. The coexistence of reidite and FRIGN zircon within the impact melt–bearing breccias indicates that cooling by seawater was heterogeneous. Our results provide valuable information on when different shock microstructures form and how they are modified according to their position in the impact structure, and this study further improves on the use of shock barometry as a diagnostic tool in understanding the cratering process.
Published: 2021

8. The Boltysh impact structure: An early Danian impact event during recovery from the K-Pg mass extinction

Author: Pickersgill, Annemarie E., primary, Mark, Darren F., additional, Lee, Martin R., additional, Kelley, Simon P., additional, and Jolley, David W., additional
Published: 2021
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9. Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure

Author: Ross, Catherine H., primary, Stockli, Daniel F., additional, Rasmussen, Cornelia, additional, Gulick, Sean P.S., additional, de Graaff, Sietze J., additional, Claeys, Philippe, additional, Zhao, Jiawei, additional, Xiao, Long, additional, Pickersgill, Annemarie E., additional, Schmieder, Martin, additional, Kring, David A., additional, Wittmann, Axel, additional, and Morgan, Joanna V., additional
Published: 2021
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10. Globally distributed iridium layer preserved within the Chicxulub impact structure

Author: Goderis, Steven, Sato, Honami, Ferrière, Ludovic, Schmitz, Birger, Burney, David, Kaskes, Pim, Vellekoop, Johan, Wittmann, Axel, Schulz, Toni, Chernonozhkin, Stepan, Claeys, Philippe, de Graaff, Sietze, Déhais, Thomas, de Winter, Niels, Elfman, Mikael, Feignon, Jean-Guillaume, Ishikawa, Akira, Koeberl, Christian, Kristiansson, Per, Neal, Clive, Owens, Jeremy, Schmieder, Martin, Sinnesael, Matthias, Vanhaecke, Frank, Van Malderen, Stijn, Bralower, Timothy, Gulick, Sean, Kring, David, Lowery, Christopher, Morgan, Joanna, Smit, Jan, Whalen, Michael, Chenot, Elise, Christeson, Gail l., Cockell, Charles S., Gebhardt, Catalina, Goto, Kazuhisa, Green, Sophie L., Jones, Heather, LeBer, Erwan, Lofi, Johanna, IODP-ICDP Expedition 364 scientists,, Perez-Cruz, Ligia, Pickersgill, Annemarie E., Poelchau, Michael H., Rae, Auriol S.P., Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Riller, Ulrich, Tikoo-Schantz, Sonia M., Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Xiao, Long, Yamaguchi, Kosei E., Stratigraphy and paleontology, Stratigraphy & paleontology, Natural Environment Research Council (NERC), Earth Sciences, Chemistry, Analytical, Environmental & Geo-Chemistry, Faculty of Sciences and Bioengineering Sciences, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Biological Psychology, Texts and Traditions, and Sociology and Social Gerontology
Subjects: 010504 meteorology & atmospheric sciences, Cretaceous–Paleogene boundary, 010502 geochemistry & geophysics, 01 natural sciences, Chicxulub crater, Sedimentary depositional environment, Paleontology, Impact crater, Iridium anomaly, SDG 14 - Life Below Water, Impact structure, ComputingMilieux_MISCELLANEOUS, Research Articles, 0105 earth and related environmental sciences, Horizon (geology), Extinction event, Multidisciplinary, SciAdv r-articles, Généralités, Geology, IODP-ICDP Expedition 364 Scientists, K-Pg boundary, Chemistry, [SDU]Sciences of the Universe [physics], Hypervelocity, mass extinction, Research Article
Abstract: The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago. Here, we report new data from four independent laboratories that reveal a positive iridium anomaly within the peak-ring sequence of the Chicxulub impact structure, in drill core recovered by IODP-ICDP Expedition 364. The highest concentration of ultrafine meteoritic matter occurs in the post-impact sediments that cover the crater peak ring, just below the lowermost Danian pelagic limestone. Within years to decades after the impact event, this part of the Chicxulub impact basin returned to a relatively low-energy depositional environment, recording in unprecedented detail the recovery of life during the succeeding millennia. The iridium layer provides a key temporal horizon precisely linking Chicxulub to K-Pg boundary sections worldwide., SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2020

11. Winding down the Chicxulub impact: The transition between impact and normal marine sedimentation near ground zero

Author: Whalen, Michael, Gulick, Sean P.S., Lowery, Christopher, Bralower, Timothy, Morgan, Joanna, Grice, Kliti, Schaefer, Bettina, Smit, Jan, Ormö, Jens, Wittmann, Axel, Kring, David, Lyons, Shelby, Goderis, Steven, Chenot, Elise, Christeson, Gail l., Clayes, Philippe, Cockell, Charles S., Coolen, Marco, Gebhardt, Catalina, Goto, Kazuhisa, Jones, Heather, LOFI, Johanna, IODP-ICDP Expedition 364 scientists,, Perez-Cruz, Ligia, Pickersgill, Annemarie E., Poelchau, Michael H., Rae, A.S.P., Green, Sophie L., Rasmussen, Cornelia, Sato, Honami, Tikoo, Sonia, Tomioka, Naotaka, Urrutia Fucugauchi, Jaime, Xiao, Long, Yamaguchi, Kosei E., Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Goderis, S. [0000-0002-6666-7153], Riller, U. [0000-0002-3803-6792], Smit, J. [0000-0002-6070-4865], National Science Foundation (NSF), Australian Research Council (ARC), Belgian Science Policy Office (BELSPO), Ministerio de Economía y Competitividad (MINECO), Agencia Estatal de Investigación (AEI), Geology and Geochemistry, Natural Environment Research Council (NERC), University of Alaska [Fairbanks] (UAF), IODP Grant, G11100, National Science Foundation (NSF), OCE 14-50528 1737199 OCE 1736951 OCE 1736826 OCE 1737087 OCE 1737351, Australian Research Council Grant, DP180100982, Analytical, Environmental & Geo-Chemistry, and Chemistry
Subjects: 010504 meteorology & atmospheric sciences, 04 Earth Sciences, Geochemistry, 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, Impact crater, Continental margin, Geochemistry and Petrology, Breccia, 14. Life underwater, SDG 14 - Life Below Water, Ejecta, Graded bedding, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Gulf of Mexico, Tsunami, Carbon isotopes, Sediment, Seiche, Geology, International Ocean Discovery Program, Pelagic sediment, Pelagic sediments, [SDU]Sciences of the Universe [physics], 13. Climate action
Abstract: IODP-ICDP Expedition 364 Scientists complete list of expedition scientists is in Appendix A., The Chicxulub impact led to the formation of a ~ 200-km wide by ~1-km deep crater on México's Yucatán Peninsula. Over a period of hours after the impact the ocean re-entered and covered the impact basin beneath several hundred meters of water. A suite of impactites were deposited across the crater during crater formation, and by the resurge, tsunami and seiche events that followed. International Ocean Discovery Program/International Continental Scientific Drilling Program Expedition 364 drilled into the peak ring of the Chicxulub crater, and recovered ~130 m of impact deposits and a 75-cm thick, fine-grained, carbonate-rich “Transitional Unit”, above which normal marine sedimentation resumed. Here, we describe the results of analyses of the uppermost impact breccia (suevite) and the Transitional Unit, which suggests a gradual waning of energy recorded by this local K-Pg boundary sequence. The dominant depositional motif in the upper suevite and the Transitional Unit is of rapid sedimentation characterized by graded bedding, local cross bedding, and evidence of oscillatory currents. The lower Transitional Unit records the change from deposition of dominantly sand-sized to mainly silt to clay sized material with impact debris that decreases in both grain size and abundance upward. The middle part of the Transitional Unit is interrupted by a 20 cm thick soft sediment slump overlain by graded and oscillatory current cross-laminated beds. The uppermost Transitional Unit is also soft sediment deformed, contains trace fossils, and an increasing abundance of planktic foraminifer and calcareous nannoplankton survivors. The Transitional Unit, as with similar deposits in other marine target impact craters, records the final phases of impact-related sedimentation prior to resumption of normal marine conditions. Petrographic and stable isotopic analyses of carbon from organic matter provide insight into post-impact processes. δC values are between terrestrial and marine end members with fluctuations of 1–3‰. Timing of deposition of the Transitional Unit is complicated to ascertain. The repetitive normally graded laminae, both below and above the soft sediment deformed interval, record rapid deposition from currents driven by tsunami and seiches, processes that likely operated for weeks to potentially years post-impact due to subsequent continental margin collapse events. Highly siderophile element-enrichment at the top of the unit is likely from fine-grained ejecta that circulated in the atmosphere for several years prior to settling. The Transitional Unit is thus an exquisite record of the final phases of impact-related sedimentation related to one of the most consequential events in Earth history., ESP2015-65712-C5-1-R, and ESP2017-87676-C5-1-R from the Spanish Ministry of Economy and Competitiveness and Fondo Europeo de Desarrollo Regional ; With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737)
Published: 2020

12. Probing the hydrothermal system of the Chicxulub impact crater

Author: Kring, David A., Tikoo, Sonia M., Schmieder, Martin, Riller, Ulrich, Rebolledo-Vieyra, Mario, Simpson, Sarah L., Osinski, Gordon R., Gattacceca, Jérôme, Wittmann, Axel, Verhagen, Christina M., Cockell, Charles S., Coolen, Marco J. L., Longstaffe, Fred J., Gulick, Sean P. S., Morgan, Joanna V., Bralower, Timothy J., Chenot, Elise, Christeson, Gail L., Claeys, Philippe, Ferrière, Ludovic, Gebhardt, Catalina, Goto, Kazuhisa, Green, Sophie L., Jones, Heather, Lofi, Johanna, Lowery, Christopher M., Ocampo-Torres, Rubén, Perez-Cruz, Ligia, Pickersgill, Annemarie E., Poelchau, Michael H., Rae, Auriol S. P., Rasmussen, Cornelia, Sato, Honami, Smit, Jan, Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Whalen, Michael T., Xiao, Long, Yamaguchi, Kosei E., Kring, David A., Tikoo, Sonia M., Schmieder, Martin, Riller, Ulrich, Rebolledo-Vieyra, Mario, Simpson, Sarah L., Osinski, Gordon R., Gattacceca, Jérôme, Wittmann, Axel, Verhagen, Christina M., Cockell, Charles S., Coolen, Marco J. L., Longstaffe, Fred J., Gulick, Sean P. S., Morgan, Joanna V., Bralower, Timothy J., Chenot, Elise, Christeson, Gail L., Claeys, Philippe, Ferrière, Ludovic, Gebhardt, Catalina, Goto, Kazuhisa, Green, Sophie L., Jones, Heather, Lofi, Johanna, Lowery, Christopher M., Ocampo-Torres, Rubén, Perez-Cruz, Ligia, Pickersgill, Annemarie E., Poelchau, Michael H., Rae, Auriol S. P., Rasmussen, Cornelia, Sato, Honami, Smit, Jan, Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Whalen, Michael T., Xiao, Long, and Yamaguchi, Kosei E.
Abstract: The ~180-km-diameter Chicxulub peak-ring crater and ~240-km multiring basin, produced by the impact that terminated the Cretaceous, is the largest remaining intact impact basin on Earth. International Ocean Discovery Program (IODP) and International Continental Scientific Drilling Program (ICDP) Expedition 364 drilled to a depth of 1335 m below the sea floor into the peak ring, providing a unique opportunity to study the thermal and chemical modification of Earth’s crust caused by the impact. The recovered core shows the crater hosted a spatially extensive hydrothermal system that chemically and mineralogically modified ~1.4 × 105 km3 of Earth’s crust, a volume more than nine times that of the Yellowstone Caldera system. Initially, high temperatures of 300° to 400°C and an independent geomagnetic polarity clock indicate the hydrothermal system was long lived, in excess of 106 years.
Published: 2020

13. Probing the hydrothermal system of the Chicxulub impact crater

Author: Kring, David A., primary, Tikoo, Sonia M., additional, Schmieder, Martin, additional, Riller, Ulrich, additional, Rebolledo-Vieyra, Mario, additional, Simpson, Sarah L., additional, Osinski, Gordon R., additional, Gattacceca, Jérôme, additional, Wittmann, Axel, additional, Verhagen, Christina M., additional, Cockell, Charles S., additional, Coolen, Marco J. L., additional, Longstaffe, Fred J., additional, Gulick, Sean P. S., additional, Morgan, Joanna V., additional, Bralower, Timothy J., additional, Chenot, Elise, additional, Christeson, Gail L., additional, Claeys, Philippe, additional, Ferrière, Ludovic, additional, Gebhardt, Catalina, additional, Goto, Kazuhisa, additional, Green, Sophie L., additional, Jones, Heather, additional, Lofi, Johanna, additional, Lowery, Christopher M., additional, Ocampo-Torres, Rubén, additional, Perez-Cruz, Ligia, additional, Pickersgill, Annemarie E., additional, Poelchau, Michael H., additional, Rae, Auriol S. P., additional, Rasmussen, Cornelia, additional, Sato, Honami, additional, Smit, Jan, additional, Tomioka, Naotaka, additional, Urrutia-Fucugauchi, Jaime, additional, Whalen, Michael T., additional, Xiao, Long, additional, and Yamaguchi, Kosei E., additional
Published: 2020
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14. Shock metamorphism in plagioclase and selective amorphization

Author: Pittarello, Lidia, primary, Daly, Luke, additional, PickersgilL, Annemarie E., additional, Ferrière, Ludovic, additional, and Lee, Martin R., additional
Published: 2020
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15. The first day of the Cenozoic

Author: Gulick, Sean, Bralower, Timothy, Ormö, Jens, Hall, Brendon, Grice, Kliti, Schaefer, Bettina, Lyons, Shelby, Freeman, Katherine, Morgan, Joanna, Artemieva, Natalia, Kaskes, Pim, De Graaff, Sietze, Whalen, Michael, Collins, Gareth, Tikoo, Sonia, Verhagen, Christina, Christeson, Gail, Claeys, Philippe, Coolen, Marco, Goderis, Steven, Goto, Kazuhisa, Grieve, Richard, McCall, Naoma, Osinski, Gordon, Rae, Auriol, Riller, Ulrich, Smit, Jan, Vajda, Vivi, Wittmann, Axel, Chenot, Elise, Cockell, Charles S., Ferrière, Ludovic, Gebhardt, Catalina, Green, Sophie L., Jones, Heather, Kring, David A., LeBer, Erwan, LOFI, Johanna, Lowery, Christopher M., OCAMPO-TORRES, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E., Poelchau, Michael H., Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Schmitt, D, Tomioka, Naotaka, Urrutia-Fucugauchi, Jaimie, Long, Xiao, Yamaguchi, Kosei E., Geology and Geochemistry, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Texas at Austin [Austin], Department of Geosciences, Pennsylvania State University (Penn State), Penn State System-Penn State System, Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Imperial College London, Analytical, Environmental and Geo- Chemistry, Vrije Universiteit Brussel (VUB), University of Alaska [Fairbanks] (UAF), Department of Earth Science and Engineering [Imperial College London], Department of Earth and Planetary Sciences [Piscataway], Rutgers, The State University of New Jersey [New Brunswick] (RU), Rutgers University System (Rutgers)-Rutgers University System (Rutgers), Institute of Geophysics [Austin] (IG), International Research Institute of Disaster Science, Tohoku University [Sendai], Centre for Planetary Science and Exploration [London, ON] (CPSX), University of Western Ontario (UWO), Department of Earth Science and Technology [Imperial College London], Universität Hamburg (UHH), Faculty of Earth and Life Sciences [Amsterdam] (FALW), Vrije Universiteit Amsterdam [Amsterdam] (VU), Department of Earth and Ecosystem Sciences [Lund], Lund University [Lund], Arizona State University [Tempe] (ASU), Chemistry, Analytical, Environmental & Geo-Chemistry, Faculty of Sciences and Bioengineering Sciences, Earth System Sciences, and Natural Environment Research Council (NERC)
Subjects: ONAPING FORMATION, Cretaceous-Paleogene, 010504 meteorology & atmospheric sciences, GULF-OF-MEXICO, Annan geovetenskap och miljövetenskap, Cretaceous–Paleogene boundary, Window (geology), ASTEROID IMPACT, 010502 geochemistry & geophysics, 01 natural sciences, POLYCYCLIC AROMATIC-HYDROCARBONS, Paleontology, suevite, SUEVITE REVISITED-OBSERVATIONS, CRETACEOUS-PALEOGENE BOUNDARY, [CHIM]Chemical Sciences, 14. Life underwater, SDG 14 - Life Below Water, RIES CRATER, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Science & Technology, Multidisciplinary, Expedition 364 Scientists, Tsunami, TERTIARY BOUNDARY, Scientific drilling, CHICXULUB IMPACT EVENT, International Ocean Discovery Program, peak ring, Multidisciplinary Sciences, Peak ring, EXTINCTION, PNAS Plus, 13. Climate action, Cretaceous–Paleogene, [SDU]Sciences of the Universe [physics], [SDE]Environmental Sciences, Chicxulub impact crater, Science & Technology - Other Topics, tsunami, Suevite, Cenozoic, Geology, Other Earth and Related Environmental Sciences
Abstract: Highly expanded Cretaceous–Paleogene (K-Pg) boundary section from the Chicxulub peak ring, recovered by International Ocean Discovery Program (IODP) –International Continental Scientific Drilling Program (ICDP) Expedition 364, provides an unprecedented window into the immediate aftermath of the impact. Site M0077 includes ∼130 m of impact melt rock and suevite deposited the first day of the Cenozoic covered by Additional funding from:The European Consortium for Ocean Research Drilling (ECORD) implemented Expedition 364 with funding from the IODP and the ICDP. US participants were supported by the US Science Support Program and National Science Foundation Grants OCE 1737351, OCE 1736826, OCE 1737087, OCE 1737037, OCE 1736951, and OCE 1737199. J.O. was partially supported by Grants ESP2015-65712-C5-1-R and ESP2017-87676-C5-1-R from the Spanish Ministry of Economy and Competitiveness and Fondo Europeo de Desarrollo Regional. B.S. thanks Curtin University for an Australian Postgraduate Award. J.V.M. was funded by Natural Environment Research Council Grant NE/P005217/1. K. Grice thanks Australia Research Council for Grant DP180100982 and Australia New Zealand IODP Consortium for funding. The Vrije Universiteit Brussel group is supported by Research Foundation Flanders (FWO) and BELSPO; P.K. is an FWO PhD fellow.
Published: 2019

16. Impact-induced porosity and micro-fracturing at the Chicxulub impact structure

Author: Rae, Auriol, Collins, Gareth, Morgan, Joanna, Salge, Tobias, Christeson, Gail, Leung, Jody, Lofi, Johanna, Gulick, Sean, Poelchau, Michael, Riller, Ulrich, Gebhardt, Catalina, Grieve, Richard, Osinski, Gordon, Chenot, Elise, Claeys, Philippe, Cockell, Charles S., Coolen, Marco J.L., Ferrière, Ludovic, Goto, Kazuhisa, Green, Sophie, Jones, Heather, Kring, David A., Lowery, Christopher, IODP-ICDP Expedition 364 scientists,, Perez-Cruz, Ligia, Pickersgill, Annemarie E., Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Sato, Honami, Smit, Jan, Tikoo-Schantz, Sonia M., Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Whalen, Michael T., Wittmann, Axel, Xiao, Long, Yamaguchi, Kosei E., Science and Technology Facilities Council (STFC), Natural Environment Research Council (NERC), Department of Earth Science and Engineering [Imperial College London], Imperial College London, The Natural History Museum [London] (NHM), University of Texas at Austin [Austin], Géosciences Montpellier, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS), Albert-Ludwigs-Universität Freiburg, Universität Hamburg (UHH), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), University of Western Ontario (UWO), Mémoires - Université de Montpellier - Faculté des sciences (UM FS), and Université de Montpellier (UM)
Subjects: Geochemistry & Geophysics, porosity, 010504 meteorology & atmospheric sciences, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], 01 natural sciences, Gravity anomaly, Seismic wave, Impact crater, GRAVITY, Geochemistry and Petrology, DEFORMATION, CRATER, Earth and Planetary Sciences (miscellaneous), Impact structure, Petrology, Magnetic anomaly, CRUSTAL STRUCTURE, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Science & Technology, ORIGIN, Scientific drilling, Petrophysics, cratering, YUCATAN, International Ocean Discovery Program, fractures, Geophysics, Chicxulub, SIZE, PEAK-RING FORMATION, [SDU]Sciences of the Universe [physics], 13. Climate action, Space and Planetary Science, Physical Sciences, ASYMMETRY, Geology, HYDROCODE SIMULATIONS
Abstract: International audience; Porosity and its distribution in impact craters has an important effect on the petrophysical properties of impactites: seismic wave speeds and reflectivity, rock permeability, strength, and density. These properties are important for the identification of potential craters and the understanding of the process and consequences of cratering. The Chicxulub impact structure, recently drilled by the joint International Ocean Discovery Program and International Continental scientific Drilling Program Expedition 364, provides a unique opportunity to compare direct observations of impactites with geophysical observations and models. Here, we combine small-scale petrographic and petrophysical measurements with larger-scale geophysical measurements and numerical simulations of the Chicxulub impact structure. Our aim is to assess the cause of unusually high porosities within the Chicxulub peak ring and the capability of numerical impact simulations to predict the gravity signature and the distribution and texture of porosity within craters. We show that high porosities within the Chicxulub peak ring are primarily caused by shock-induced microfracturing. These fractures have preferred orientations, which can be predicted by considering the orientations of principal stresses during shock, and subsequent deformation during peak ring formation. Our results demonstrate that numerical impact simulations, implementing the Dynamic Collapse Model of peak ring formation, can accurately predict the distribution and orientation of impact-induced microfractures in large craters, which plays an important role in the geophysical signature of impact structures. Plain Language Summary The Chicxulub crater, Mexico, is widely known for its association with the extinction of the nonavian dinosaurs at the end of the Cretaceous period. The crater was first identified due to its gravitational and magnetic anomalies. Potential impact structures are often identified, in part, on the basis of geophysical anomalies, most commonly including a circular gravity low. Gravity is slightly weaker at craters because the impact cratering process removes mass from the impact site. In this study, we examine the cause of the Chicxulub gravity anomaly by combining observations from recent drilling of the crater, geophysical data measured across the crater, and numerical impact simulations. We demonstrate that porosity in rocks beneath the crater floor is primarily accommodated by fracturing during the impact cratering process, that the orientation of those fractures are consistent with predictions from numerical impact simulations, and that impact-induced porosity is one of the primary causes of gravity anomalies in large impact craters.
Published: 2019

17. New shock microstructures in titanite (CaTiSiO5) from the peak ring of the Chicxulub impact structure, Mexico

Author: Timms, Nicholas E., Pearce, Mark A., Erickson, Timmons M., Cavosie, Aaron J., Rae, Auriol S. P., Wheeler, John, Wittmann, Axel, Ferrière, Ludovic, Poelchau, Michael H., Tomioka, Naotaka, Collins, Gareth S., Gulick, Sean P. S., Rasmussen, Cornelia, Morgan, Joanna V., Chenot, Elise, Christeson, Gail, Claeys, P., Cockell, C., Coolen, Marco J.L., Gebhardt, Catalina, Koto, K, Green, S., Jones, Heather, Kring, D. A., Lofi, Johanna, Lowery, Christopher M, Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Rae, Auriol S P, Rasmussen, C., Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, H., Smit, J., Tikoo, S., Tomioka, N., Urrutia-Fucugauchi, J., Whalen, Michael T, Xiao, L., Yamaguchi, K. E., Timms, Nicholas E., Pearce, Mark A., Erickson, Timmons M., Cavosie, Aaron J., Rae, Auriol S. P., Wheeler, John, Wittmann, Axel, Ferrière, Ludovic, Poelchau, Michael H., Tomioka, Naotaka, Collins, Gareth S., Gulick, Sean P. S., Rasmussen, Cornelia, Morgan, Joanna V., Chenot, Elise, Christeson, Gail, Claeys, P., Cockell, C., Coolen, Marco J.L., Gebhardt, Catalina, Koto, K, Green, S., Jones, Heather, Kring, D. A., Lofi, Johanna, Lowery, Christopher M, Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Rae, Auriol S P, Rasmussen, C., Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, H., Smit, J., Tikoo, S., Tomioka, N., Urrutia-Fucugauchi, J., Whalen, Michael T, Xiao, L., and Yamaguchi, K. E.
Abstract: Accessory mineral geochronometers such as apatite, baddeleyite, monazite, xenotime and zircon are increasingly being recognized for their ability to preserve diagnostic microstructural evidence of hypervelocity-impact processes. To date, little is known about the response of titanite to shock metamorphism, even though it is a widespread accessory phase and a U–Pb geochronometer. Here we report two new mechanical twin modes in titanite within shocked granitoid from the Chicxulub impact structure, Mexico. Titanite grains in the newly acquired core from the International Ocean Discovery Program Hole M0077A preserve multiple sets of polysynthetic twins, most commonly with composition planes (K1) = ~ {1¯11} { 1 ¯ 11 } , and shear direction (η1) = < 110 > , and less commonly with the mode K1 = {130}, η1 = ~ <522 > . In some grains, {130} deformation bands have formed concurrently with the deformation twins, indicating dislocation slip with Burgers vector b = < 341 > can be active during impact metamorphism. Titanite twins in the modes described here have not been reported from endogenically deformed rocks; we, therefore, propose this newly identified twin form as a result of shock deformation. Formation conditions of the twins have not been experimentally calibrated, and are here empirically constrained by the presence of planar deformation features in quartz (12 ± 5 and ~ 17 ± 5 GPa) and the absence of shock twins in zircon (< 20 GPa). While the lower threshold of titanite twin formation remains poorly constrained, identification of these twins highlight the utility of titanite as a shock indicator over the pressure range between 12 and 17 GPa. Given the challenges to find diagnostic indicators of shock metamorphism to identify both ancient and recent impact evidence on Earth, microstructural analysis of titanite is here demonstrated to provide a new tool for recognizing impact deformation in rocks where other impact evidence may be erased, altered, or did not manifest d
Published: 2019

18. Peering inside the peak ring of the Chicxulub Impact Crater-its nature and formation mechanism

Author: Urrutia-Fucugauchi, Jaime, Pérez-Cruz, Ligia, Morgan, Joanna, Gulick, Sean, Wittmann, Axel, Lofi, Johanna, Morgan, Joanna V, Gulick, Sean P. S., Chenot, Elise, Christeson, Gail, Claeys, Phillipe, Cockell, C., Coolen, Marco J.L., Ferriere, L., Gebhardt, Catalina, Goto, K., Jones, Heather, Kring, D. A., Lowery, Christopher M, Mellett, C., Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael, Rae, A.S.P., Rasmussen, C., Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, H., Smit, J., Tikoo, Sonia M, Tomioka, N., Urrutia-Fucugauchi, J., Whalen, Michael, Xiao, L., Yamaguchi, K. E., Bralower, Timothy, Collins, G. S., Urrutia-Fucugauchi, Jaime, Pérez-Cruz, Ligia, Morgan, Joanna, Gulick, Sean, Wittmann, Axel, Lofi, Johanna, Morgan, Joanna V, Gulick, Sean P. S., Chenot, Elise, Christeson, Gail, Claeys, Phillipe, Cockell, C., Coolen, Marco J.L., Ferriere, L., Gebhardt, Catalina, Goto, K., Jones, Heather, Kring, D. A., Lowery, Christopher M, Mellett, C., Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael, Rae, A.S.P., Rasmussen, C., Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, H., Smit, J., Tikoo, Sonia M, Tomioka, N., Urrutia-Fucugauchi, J., Whalen, Michael, Xiao, L., Yamaguchi, K. E., Bralower, Timothy, and Collins, G. S.
Abstract: The IODP-ICDP Expedition 364 drilled into the Chicxulub crater, peering inside its well-preserved peak ring. The borehole penetrated a sequence of post-impact carbonates and a unit of suevites and clast-poor impact melt rock at the top of the peak ring. Beneath this sequence, basement rocks cut by pre-impact and impact dykes, with breccias and melt, were encountered at shallow depths. The basement rocks are fractured, shocked and uplifted, consistent with dynamic collapse, uplift and long-distance transport of weakened material during collapse of the transient cavity and final crater formation.
Published: 2019

19. Ocean Drilling Perspectives on Meteorite Impacts

Author: Lowery, Chistopher, Morgan, Joanna, Gulick, Sean, Bralower, Timothy, Christeson, Gail, Chenot, Elise, Claeys, P., Cockell, C., Coolen, Marco J L, Ferrière, Ludovic, Gebhardt, Catalina, Goto, K., Green, Sophie, Jones, Heather, Kring, D. A., Lofi, Johanna, Mellett, C., Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael, Rae, Auriol S P, Rasmussen, Cornelia, Rebolledo-Vieyra, M., Riller, U., Sato, H., Smith, J., Tikoo, S., Tomioka, Naotaka, Urrutia-Fucugauchi, J., Whalen, M.T., Wittmann, Axel, Xiao, L., Yamaguchi, Kosei E, Lowery, Chistopher, Morgan, Joanna, Gulick, Sean, Bralower, Timothy, Christeson, Gail, Chenot, Elise, Claeys, P., Cockell, C., Coolen, Marco J L, Ferrière, Ludovic, Gebhardt, Catalina, Goto, K., Green, Sophie, Jones, Heather, Kring, D. A., Lofi, Johanna, Mellett, C., Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael, Rae, Auriol S P, Rasmussen, Cornelia, Rebolledo-Vieyra, M., Riller, U., Sato, H., Smith, J., Tikoo, S., Tomioka, Naotaka, Urrutia-Fucugauchi, J., Whalen, M.T., Wittmann, Axel, Xiao, L., and Yamaguchi, Kosei E
Abstract: Extraterrestrial impacts that reshape the surfaces of rocky bodies are ubiquitous in the solar system. On early Earth, impact structures may have nurtured the evolution of life. More recently, a large meteorite impact off the Yucatán Peninsula in Mexico at the end of the Cretaceous caused the disappearance of 75% of species known from the fossil record, including non-avian dinosaurs, and cleared the way for the dominance of mammals and the eventual evolution of humans. Understanding the fundamental processes associated with impact events is critical to understanding the history of life on Earth, and the potential for life in our solar system and beyond. Scientific ocean drilling has generated a large amount of unique data on impact pro- cesses. In particular, the Yucatán Chicxulub impact is the single largest and most sig- nificant impact event that can be studied by sampling in modern ocean basins, and marine sediment cores have been instrumental in quantifying its environmental, cli- matological, and biological effects. Drilling in the Chicxulub crater has significantly advanced our understanding of fundamental impact processes, notably the formation of peak rings in large impact craters, but these data have also raised new questions to be addressed with future drilling. Within the Chicxulub crater, the nature and thickness of the melt sheet in the central basin is unknown, and an expanded Paleocene hemipelagic section would provide insights to both the recovery of life and the climatic changes that followed the impact. Globally, new cores collected from today’s central Pacific could directly sample the downrange ejecta of this northeast-southwest trending impact. Extraterrestrial impacts have been controversially suggested as primary drivers for many important paleoclimatic and environmental events throughout Earth history. However, marine sediment archives collected via scientific ocean drilling and geo- chemical proxies (e.g., osmium isotopes) provide a long-te
Published: 2019

20. Rock fluidization during peak-ring formation of large impact structures

Author: Riller, Ulrich, Poelchau, Michael H., Rae, Auriol S. P., Schulte, Felix M., Collins, Gareth S., Melosh, H. Jay, Grieve, Richard A. F., Morgan, Joanna V., Gulick, Sean P. S., Lofi, Johanna, Diaw, Abdoulaye, McCall, Naoma, Kring, David A., Green, Sophie L., Chenot, Elise, Christeson, Gail L., Claeys, Philippe, Cockell, Charles S., Coolen, Marco J. L., Ferrière, Ludovic, Gebhardt, Catalina, Goto, Kazuhisa, Jones, Heather, Long, Xiao, Lowery, Christopher M., Ocampo-Torres, Rubén, Pérez-Cruz, Ligia, Pickersgill, Annemarie E., Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Sato, Honami, Smit, Jan, Tikoo-Schantz, Sonia M., Tomioka, Naotaka, Whalen, Michael T., Wittmann, Axel, Yamaguchi, Kosei E., Fucugauchi, Jaime Urrutia, Bralower, Timothy J., IODP–ICDP Expedition 364 Science Party, Institut für Geologie, Universität Hamburg (UHH), Department of Geology, University of Freiburg [Freiburg], Department of Earth Science and Engineering [Imperial College London], Imperial College London, Department of Earth, Atmospheric, and Planetary Sciences [West Lafayette] (EAPS), Purdue University [West Lafayette], Centre for Planetary Science and Exploration [London, ON] (CPSX), University of Western Ontario (UWO), Institute of Geophysics [Austin] (IG), University of Texas at Austin [Austin], Department of Geological Sciences [Austin], Jackson School of Geosciences (JSG), University of Texas at Austin [Austin]-University of Texas at Austin [Austin], Géosciences Montpellier, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS), Universities Space Research Association (USRA), British Geological Survey [Edinburgh], British Geological Survey (BGS), Biogéosciences [UMR 6282] [Dijon] (BGS), Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Centre National de la Recherche Scientifique (CNRS), Analytical, Environmental and Geo- Chemistry, Vrije Universiteit Brussel (VUB), SUPA School of Physics and Astronomy [Edinburgh], University of Edinburgh, WA-Organic and Isotope Geochemistry Centre (WA-OIGC), The Institute for Geoscience Research [Perth] (TIGeR), School of Earth and Planetary Science [Perth - Curtin university], Curtin University [Perth], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC)-Curtin University [Perth], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC)-School of Earth and Planetary Science [Perth - Curtin university], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC), Natural History Museum [Vienna] (NHM), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), International Research Institute of Disaster Science, Tohoku University [Sendai], Pennsylvania State University (Penn State), Penn State System, China University of Geosciences [Beijing], Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Instituto de Geofisica [Mexico], Universidad Nacional Autónoma de México (UNAM), School of Geographical and Earth Sciences, University of Glasgow, NERC Argon Isotope Facility [Glasgow], Scottish Universities Environmental Research Centre (SUERC), University of Glasgow-University of Edinburgh-University of Glasgow-University of Edinburgh-Natural Environment Research Council (NERC), Unidad de Ciencias del Agua, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Faculty of Earth and Life Sciences [Amsterdam] (FALW), Vrije Universiteit Amsterdam [Amsterdam] (VU), Department of Earth and Planetary Sciences [Piscataway], Rutgers, The State University of New Jersey [New Brunswick] (RU), Rutgers University System (Rutgers)-Rutgers University System (Rutgers), Kochi Institute for Core Sample Research, Department of Geosciences, University of Alaska [Fairbanks] (UAF), Eyring Materials Center, Arizona State University [Tempe] (ASU), Department of Chemistry, Toho University, NASA Astrobiology Institute (NAI), Work supported by the Priority Programs 527 and 1006 of the German Science Foundation (grants Ri 916/16-1 and PO 1815/2-1), National Science Foundation grants (OCE-1737351, OCE-1450528 and OCE-1736826), and Natural Environment Research Council (grants NE/P011195/1 and NE/P005217/1), by the European Consortium for Ocean Research Drilling (ECORD) and the IODP as Expedition 364 with co-funding from the ICDP., Science and Technology Facilities Council (STFC), Natural Environment Research Council (NERC), Analytical, Environmental & Geo-Chemistry, Earth System Sciences, and Chemistry
Subjects: Solar System, 010504 meteorology & atmospheric sciences, ACOUSTIC FLUIDIZATION, General Science & Technology, Flow (psychology), [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Deformation (meteorology), 010502 geochemistry & geophysics, 01 natural sciences, Brittleness, DEFORMATION, Fluidization, Impact structure, Petrology, COLLAPSE, IODP–ICDP Expedition 364 Science Party, 0105 earth and related environmental sciences, Multidisciplinary, Science & Technology, EXAMPLE, Drilling, SIMULATIONS, CHICXULUB CRATER, Multidisciplinary Sciences, TARGET, Meteorite, SUDBURY, general, ASYMMETRY, Science & Technology - Other Topics, VREDEFORT, Geology
Abstract: 8 pages; International audience; Large meteorite impact structures on the terrestrial bodies of the Solar System contain pronounced topographic rings, which emerged from uplifted target (crustal) rocks within minutes of impact. To flow rapidly over large distances, these target rocks must have weakened drastically, but they subsequently regained sufficient strength to build and sustain topographic rings. The mechanisms of rock deformation that accomplish such extreme change in mechanical behaviour during cratering are largely unknown and have been debated for decades. Recent drilling of the approximately 200-km-diameter Chicxulub impact structure in Mexico has produced a record of brittle and viscous deformation within its peak-ring rocks. Here we show how catastrophic rock weakening upon impact is followed by an increase in rock strength that culminated in the formation of the peak ring during cratering. The observations point to quasi-continuous rock flow and hence acoustic fluidization as the dominant physical process controlling initial cratering, followed by increasingly localized faulting.
Published: 2018

21. Ocean Drilling Perspectives on Meteorite Impacts

Author: Lowery, Chistopher, Morgan, Joanna, Gulick, Sean, Bralower, Timothy, Christeson, Gail, Chenot, Elise, Claeys, P., Cockell, C., Coolen, Marco J L, Ferrière, Ludovic, Gebhardt, Catalina, Goto, K., Green, Sophie, Jones, Heather, Kring, D. A., Lofi, Johanna, Mellett, C., Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael, Rae, Auriol S P, Rasmussen, Cornelia, Rebolledo-Vieyra, M., Riller, U., Sato, H., Smith, J., Tikoo, S., Tomioka, Naotaka, Urrutia-Fucugauchi, J., Whalen, M.T., Wittmann, Axel, Xiao, L., Yamaguchi, Kosei E, Analytical, Environmental & Geo-Chemistry, Earth System Sciences, and Chemistry
Subjects: bepress|Physical Sciences and Mathematics|Earth Sciences|Paleontology, bepress|Physical Sciences and Mathematics, EarthArXiv|Physical Sciences and Mathematics|Oceanography and Atmospheric Sciences and Meteorology, 010504 meteorology & atmospheric sciences, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Paleobiology, Earth science, bepress|Physical Sciences and Mathematics|Earth Sciences, EarthArXiv|Physical Sciences and Mathematics|Planetary Sciences|Planetary Geophysics and Seismology, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Stratigraphy, Structural basin, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences, 01 natural sciences, Impact crater, bepress|Physical Sciences and Mathematics|Earth Sciences|Geophysics and Seismology, bepress|Physical Sciences and Mathematics|Oceanography and Atmospheric Sciences and Meteorology, 14. Life underwater, oceanography, Ejecta, 0105 earth and related environmental sciences, EarthArXiv|Physical Sciences and Mathematics|Planetary Sciences|Planetary Geomorphology, Extinction event, geography, geography.geographical_feature_category, 010505 oceanography, 15. Life on land, Early Earth, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Paleontology, bepress|Physical Sciences and Mathematics|Earth Sciences|Stratigraphy, EarthArXiv|Physical Sciences and Mathematics, bepress|Physical Sciences and Mathematics|Earth Sciences|Paleobiology, Meteorite, EarthArXiv|Physical Sciences and Mathematics|Planetary Sciences, 13. Climate action, Extraterrestrial life, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Geophysics and Seismology, Oceanic basin, Geology
Abstract: Extraterrestrial impacts that reshape the surfaces of rocky bodies are ubiquitous in the solar system. On early Earth, impact structures may have nurtured the evolution of life. More recently, a large meteorite impact off the Yucatán Peninsula in Mexico at the end of the Cretaceous caused the disappearance of 75% of species known from the fossil record, including non-avian dinosaurs, and cleared the way for the dominance of mammals and the eventual evolution of humans. Understanding the fundamental processes associated with impact events is critical to understanding the history of life on Earth, and the potential for life in our solar system and beyond.\ud \ud Scientific ocean drilling has generated a large amount of unique data on impact processes. In particular, the Yucatán Chicxulub impact is the single largest and most significant impact event that can be studied by sampling in modern ocean basins, and marine sediment cores have been instrumental in quantifying its environmental, climatological, and biological effects. Drilling in the Chicxulub crater has significantly advanced our understanding of fundamental impact processes, notably the formation of peak rings in large impact craters, but these data have also raised new questions to be addressed with future drilling. Within the Chicxulub crater, the nature and thickness of the melt sheet in the central basin is unknown, and an expanded Paleocene hemipelagic section would provide insights to both the recovery of life and the climatic changes that followed the impact. Globally, new cores collected from today’s central Pacific could directly sample the downrange ejecta of this northeast-southwest trending impact.\ud \ud Extraterrestrial impacts have been controversially suggested as primary drivers for many important paleoclimatic and environmental events throughout Earth history. However, marine sediment archives collected via scientific ocean drilling and geochemical proxies (e.g., osmium isotopes) provide a long-term archive of major impact events in recent Earth history and show that, other than the end-Cretaceous, impacts do not appear to drive significant environmental changes.
Published: 2018

22. Drilling-induced and logging-related features illustrated from IODP–ICDP Expedition 364 downhole logs and borehole imaging tools

Author: Lofi, Johanna, Smith, David, Delahunty, Chris, Le Ber, Erwan, Brun, Laurent, Henry, Gilles, Paris, Jehanne, Tikoo, Sonia, Zylberman, William, Pezard, Philippe A., Célérier, Bernard, Schmitt, Douglas R., Nixon, Chris, Gulick, Sean P. S., Morgan, Joanna V, Chenot, Elise, Christeson, Gail, Claeys, Phillipe, Cockell, Charles S, Coolen, Marco J L, Ferrière, Ludovic, Gebhardt, Catalina, Goto, K., Green, S., Jones, Heather, Kring, David A, Lowery, C., Mellett, C., Ocampo-Torres, R., Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael, Rae, Auriol S. P., Rasmussen, C., Rebolledo-Vieyra, M., Riller, Ulrich, Sato, H., Smit, J., Tomioka, N., Urrutia-Fucugauchi, J., Whalen, Michael, Wittmann, Axel, Xiao, L., Yamaguchi, Kosei E, Bralower, Timothy J, Analytical, Environmental & Geo-Chemistry, Earth System Sciences, Chemistry, Géosciences Montpellier, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS), British Geological Survey (BGS), DOSECC Exploration Services, Department of Geology [Leicester], University of Leicester, Department of Earth and Planetary Sciences [Piscataway], Rutgers, The State University of New Jersey [New Brunswick] (RU), Rutgers University System (Rutgers)-Rutgers University System (Rutgers), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Department of Physics, University of Alberta, Department of Earth, Atmospheric, and Planetary Sciences [West Lafayette] (EAPS), Purdue University [West Lafayette], Institute of Geophysics [Austin] (IG), University of Texas at Austin [Austin], Department of Geological Sciences [Austin], Jackson School of Geosciences (JSG), University of Texas at Austin [Austin]-University of Texas at Austin [Austin], Department of Earth Science and Engineering [Imperial College London], Imperial College London, Biogéosciences [UMR 6282] [Dijon] (BGS), Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Centre National de la Recherche Scientifique (CNRS), Analytical, Environmental and Geo- Chemistry, Vrije Universiteit Brussel (VUB), UK Centre for Astrobiology, SUPA School of Physics and Astronomy [Edinburgh], University of Edinburgh-University of Edinburgh, WA-Organic and Isotope Geochemistry Centre (WA-OIGC), The Institute for Geoscience Research [Perth] (TIGeR), School of Earth and Planetary Science [Perth - Curtin university], Curtin University [Perth], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC)-Curtin University [Perth], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC)-School of Earth and Planetary Science [Perth - Curtin university], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC), Natural History Museum [Vienna] (NHM), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), International Research Institute of Disaster Science, Tohoku University [Sendai], British Geological Survey [Edinburgh], Department of Geosciences [PennState], College of Earth and Mineral Sciences, Pennsylvania State University (Penn State), Penn State System-Penn State System-Pennsylvania State University (Penn State), Penn State System-Penn State System, Lunar and Planetary Institute [Houston] (LPI), Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Instituto de Geofisica [Mexico], Universidad Nacional Autónoma de México (UNAM), School of Geographical and Earth Sciences, University of Glasgow, University of Glasgow, Department of Geology, University of Freiburg [Freiburg], Institut für Geologie, Universität Hamburg (UHH), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Faculty of Earth and Life Sciences [Amsterdam] (FALW), Vrije Universiteit Amsterdam [Amsterdam] (VU), Kochi Institute for Core Sample Research, Department of Geosciences, University of Alaska [Fairbanks] (UAF), LeRoy Eyring Center for Solid State Science, China University of Geosciences [Beijing], Department of Chemistry, Toho University, Funded by IODP withco-funding from ICDP and implemented by ECORD, with contributionsand logistical support from the Yucatán state government and the National Autonomous University of Mexico., Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Vrije Universiteit [Brussels] (VUB), WA Organic and Isotope Geochemistry Centre (WA OIGC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Biogéosciences [UMR 6282] (BGS), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), and Geology and Geochemistry
Subjects: Geochemistry & Geophysics, 010504 meteorology & atmospheric sciences, Drill, Mechanical Engineering, 04 Earth Sciences, lcsh:QE1-996.5, Borehole, Drilling, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Energy Engineering and Power Technology, 010502 geochemistry & geophysics, 01 natural sciences, Coring, Seafloor spreading, lcsh:Geology, Impact crater, Sedimentary rock, SDG 14 - Life Below Water, Petrology, Casing, Geology, 0105 earth and related environmental sciences
Abstract: 13 pages; International audience; Expedition 364 was a joint IODP and ICDP mission-specific platform (MSP) expedition to explore the Chicxulub impact crater buried below the surface of the Yucatán continental shelf seafloor. In April and May 2016, this expedition drilled a single borehole at Site M0077 into the crater's peak ring. Excellent quality cores were recovered from ∼505 to ∼1335 m below seafloor (m b.s.f.), and high-resolution open hole logs were acquired between the surface and total drill depth. Downhole logs are used to image the borehole wall, measure the physical properties of rocks that surround the borehole, and assess borehole quality during drilling and coring operations. When making geological interpretations of downhole logs, it is essential to be able to distinguish between features that are geological and those that are operation-related. During Expedition 364 some drilling-induced and logging-related features were observed and include the following: effects caused by the presence of casing and metal debris in the hole, logging-tool eccentering, drilling-induced corkscrew shape of the hole, possible re-magnetization of low-coercivity grains within sedimentary rocks, markings on the borehole wall, and drilling-induced changes in the borehole diameter and trajectory.
Published: 2018

23. Rapid recovery of life at ground zero of the end-Cretaceous mass extinction

Author: Lowery, Christopher M, Bralower, Timothy J, Owens, Jeremy D, Rodriguez-Tovar, Francisco J, Jones, Heather, Smit, Jan, Whalen, Michael T, Claeys, Phillipe, Farley, Kenneth, Gulick, Sean P S, Morgan, Joanna V, Green, Sophie, Chenot, Elise, Christeson, Gail L, Cockell, Charles S, Coolen, Marco J L, Ferrière, Ludovic, Gebhardt, Catalina, Goto, Kazuhisha, Kring, David A, Lofi, Johanna, Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael H, Rae, Auriol S P, Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, Honami, Tikoo, Sonia M, Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Vellekoop, Johan, Wittmann, Axel, Xiao, Long, Yamaguchi, Kosei E, Zylberman, William, Lowery, Christopher M, Bralower, Timothy J, Owens, Jeremy D, Rodriguez-Tovar, Francisco J, Jones, Heather, Smit, Jan, Whalen, Michael T, Claeys, Phillipe, Farley, Kenneth, Gulick, Sean P S, Morgan, Joanna V, Green, Sophie, Chenot, Elise, Christeson, Gail L, Cockell, Charles S, Coolen, Marco J L, Ferrière, Ludovic, Gebhardt, Catalina, Goto, Kazuhisha, Kring, David A, Lofi, Johanna, Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael H, Rae, Auriol S P, Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, Honami, Tikoo, Sonia M, Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Vellekoop, Johan, Wittmann, Axel, Xiao, Long, Yamaguchi, Kosei E, and Zylberman, William
Abstract: The Cretaceous/Palaeogene mass extinction eradicated 76% of species on Earth. It was caused by the impact of an asteroid on the Yucatán carbonate platform in the southern Gulf of Mexico 66 million years ago, forming the Chicxulub impact crater. After the mass extinction, the recovery of the global marine ecosystem—measured as primary productivity—was geographically heterogeneous; export production in the Gulf of Mexico and North Atlantic–western Tethys was slower than in most other regions, taking 300 thousand years (kyr) to return to levels similar to those of the Late Cretaceous period. Delayed recovery of marine productivity closer to the crater implies an impact-related environmental control, such as toxic metal poisoning, on recovery times. If no such geographic pattern exists, the best explanation for the observed heterogeneity is a combination of ecological factors—trophic interactions, species incumbency and competitive exclusion by opportunists—and ‘chance’. The question of whether the post-impact recovery of marine productivity was delayed closer to the crater has a bearing on the predictability of future patterns of recovery in anthropogenically perturbed ecosystems. If there is a relationship between the distance from the impact and the recovery of marine productivity, we would expect recovery rates to be slowest in the crater itself. Here we present a record of foraminifera, calcareous nannoplankton, trace fossils and elemental abundance data from within the Chicxulub crater, dated to approximately the first 200 kyr of the Palaeocene. We show that life reappeared in the basin just years after the impact and a high-productivity ecosystem was established within 30 kyr, which indicates that proximity to the impact did not delay recovery and that there was therefore no impact-related environmental control on recovery. Ecological processes probably controlled the recovery of productivity after the Cretaceous/Palaeogene mass extinction and are therefore likel
Published: 2018

24. Chicxulub and the Exploration of Large Peak-Ring Impact Craters through Scientific Drilling

Author: Kring, David A., Claeys, Philippe, Gulick, Sean P.S., Morgan, Joanna V., Collins, Gareth S., Bralower, Timothy, Chenot, Elise, Christeson, Gail, Cockell, C., Coolen, Marco J L, Ferrière, Ludovic, Gebhardt, Catalina, Goto, K., Jones, Heather, Lofi, Johanna, Lowery, Christopher M, Mellett, C., Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael, Rae, Auriol, Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, H., Smit, Jan, Tikoo, Sonia M, Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Whalen, Michael T, Wittmann, Axel, Xiao, L., Yamaguchi, K. E., Zylberman, William, Kring, David A., Claeys, Philippe, Gulick, Sean P.S., Morgan, Joanna V., Collins, Gareth S., Bralower, Timothy, Chenot, Elise, Christeson, Gail, Cockell, C., Coolen, Marco J L, Ferrière, Ludovic, Gebhardt, Catalina, Goto, K., Jones, Heather, Lofi, Johanna, Lowery, Christopher M, Mellett, C., Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Pickersgill, Annemarie E, Poelchau, Michael, Rae, Auriol, Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, H., Smit, Jan, Tikoo, Sonia M, Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Whalen, Michael T, Wittmann, Axel, Xiao, L., Yamaguchi, K. E., and Zylberman, William
Abstract: The Chicxulub crater is the only well-preserved peak-ring crater on Earth and linked, famously, to the K-T or K-Pg mass extinction event. For the first time, geologists have drilled into the peak ring of that crater in the International Ocean Discovery Program and International Continental Scientific Drilling Program (IODP-ICDP) Expedition 364. The Chicxulub impact event, the environmental calamity it produced, and the paleobiological consequences are among the most captivating topics being discussed in the geologic community. Here we focus attention on the geological processes that shaped the ~200-km-wide impact crater responsible for that discussion and the expedition’s first year results.
Published: 2017

25. Shock Metamorphic Effects in Lunar and Terrestrial Plagioclase Feldspar Investigated by Optical Petrography and Micro-X-Ray Diffraction

Author: Pickersgill, Annemarie E
Subjects: Mistastin Lake, Apollo, Geology, shock metamorphism, plagioclase, Moon, micro-X-ray diffraction
Abstract: Shock metamorphism, caused by hypervelocity impact, is a poorly understood process in feldspar. This thesis addresses: a) developing a quantitative scale of shock deformation in plagioclase feldspar; b) expanding the utility of plagioclase feldspar for determining shock level; and c) micro-X-ray diffraction as a technique with which to study shock in feldspar. Andesine and labradorite from the Mistastin Lake impact structure, Labrador, Canada, and anorthite from Earth’s moon, returned during the Apollo program, show shock effects such as diaplectic glass. Planar deformation features are absent in plagioclase, but abundant in terrestrial quartz. A pseudomorphous zeolite phase (levyne-Ca) was identified as a replacement mineral of diaplectic feldspar glass in some terrestrial samples. Micro-X-ray diffraction patterns revealed increased peak broadening in the chi direction (χ) (due to strain-related mosaicity) with increased optical signs of deformation. Measuring the full-width-at-half-maximum (FWHMχ) of these peaks provides a quantitative way to measure strain in shocked samples.
Published: 2014

26. Toward quantification of strain-related mosaicity in shocked lunar and terrestrial plagioclase by in situ micro-X-ray diffraction

Author: Pickersgill, Annemarie E., primary, Flemming, Roberta L., additional, and Osinski, Gordon R., additional
Published: 2015
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27. Shock effects in plagioclase feldspar from the Mistastin Lake impact structure, Canada

Author: Pickersgill, Annemarie E., primary, Osinski, Gordon R., additional, and Flemming, Roberta L., additional
Published: 2015
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28. Impact-generated hydrothermal systems on Earth and Mars

Author: Osinski, Gordon R., Tornabene, Livio L., Banerjee, Neil R., Cockell, Charles S., Flemming, Roberta, Izawa, Matthew R. M., McCutcheon, Jenine, Parnell, John, Preston, Louisa J., Pickersgill, Annemarie E., Pontefract, Alexandra, Sapers, Haley M., Southam, Gordon, Osinski, Gordon R., Tornabene, Livio L., Banerjee, Neil R., Cockell, Charles S., Flemming, Roberta, Izawa, Matthew R. M., McCutcheon, Jenine, Parnell, John, Preston, Louisa J., Pickersgill, Annemarie E., Pontefract, Alexandra, Sapers, Haley M., and Southam, Gordon
Abstract: It has long been suggested that hydrothermal systems might have provided habitats for the origin and evolution of early life on Earth, and possibly other planets such as Mars. In this contribution we show that most impact events that result in the formation of complex impact craters (i.e., >2–4 and >5–10 km diameter on Earth and Mars, respectively) are potentially capable of generating a hydrothermal system. Consideration of the impact cratering record on Earth suggests that the presence of an impact crater lake is critical for determining the longevity and size of the hydrothermal system. We show that there are six main locations within and around impact craters on Earth where impact-generated hydrothermal deposits can form: 1) crater-fill impact melt rocks and melt-bearing breccias; 2) interior of central uplifts; 3) outer margin of central uplifts; 4) impact ejecta deposits; 5) crater rim region; and 6) post-impact crater lake sediments. We suggest that these six locations are applicable to Mars as well. Evidence for impact-generated hydrothermal alteration ranges from discrete vugs and veins to pervasive alteration depending on the setting and nature of the system. A variety of hydrothermal minerals have been documented in terrestrial impact structures and these can be grouped into three broad categories: (1) hydrothermally-altered target-rock assemblages; (2) primary hydrothermal minerals precipitated from solutions; and (3) secondary assemblages formed by the alteration of primary hydrothermal minerals. Target lithology and the origin of the hydrothermal fluids strongly influences the hydrothermal mineral assemblages formed in these post-impact hydrothermal systems. There is a growing body of evidence for impact-generated hydrothermal activity on Mars; although further detailed studies using high-resolution imagery and multispectral information are required. Such studies have only been done in detail for a handful of Martian craters. The best example so far is

29. Impact-generated hydrothermal systems on Earth and Mars

Author: Osinski, Gordon R., Tornabene, Livio L., Banerjee, Neil R., Cockell, Charles S., Flemming, Roberta, Izawa, Matthew R. M., McCutcheon, Jenine, Parnell, John, Preston, Louisa J., Pickersgill, Annemarie E., Pontefract, Alexandra, Sapers, Haley M., Southam, Gordon, Osinski, Gordon R., Tornabene, Livio L., Banerjee, Neil R., Cockell, Charles S., Flemming, Roberta, Izawa, Matthew R. M., McCutcheon, Jenine, Parnell, John, Preston, Louisa J., Pickersgill, Annemarie E., Pontefract, Alexandra, Sapers, Haley M., and Southam, Gordon
Abstract: It has long been suggested that hydrothermal systems might have provided habitats for the origin and evolution of early life on Earth, and possibly other planets such as Mars. In this contribution we show that most impact events that result in the formation of complex impact craters (i.e., >2–4 and >5–10 km diameter on Earth and Mars, respectively) are potentially capable of generating a hydrothermal system. Consideration of the impact cratering record on Earth suggests that the presence of an impact crater lake is critical for determining the longevity and size of the hydrothermal system. We show that there are six main locations within and around impact craters on Earth where impact-generated hydrothermal deposits can form: 1) crater-fill impact melt rocks and melt-bearing breccias; 2) interior of central uplifts; 3) outer margin of central uplifts; 4) impact ejecta deposits; 5) crater rim region; and 6) post-impact crater lake sediments. We suggest that these six locations are applicable to Mars as well. Evidence for impact-generated hydrothermal alteration ranges from discrete vugs and veins to pervasive alteration depending on the setting and nature of the system. A variety of hydrothermal minerals have been documented in terrestrial impact structures and these can be grouped into three broad categories: (1) hydrothermally-altered target-rock assemblages; (2) primary hydrothermal minerals precipitated from solutions; and (3) secondary assemblages formed by the alteration of primary hydrothermal minerals. Target lithology and the origin of the hydrothermal fluids strongly influences the hydrothermal mineral assemblages formed in these post-impact hydrothermal systems. There is a growing body of evidence for impact-generated hydrothermal activity on Mars; although further detailed studies using high-resolution imagery and multispectral information are required. Such studies have only been done in detail for a handful of Martian craters. The best example so far is

30. The Winchcombe meteorite, a unique and pristine witness from the outer solar system

Author: King, Ashley J., Daly, Luke, Rowe, James, Joy, Katherine H., Greenwood, Richard C., Devillepoix, Hadrien A. R., Suttle, Martin D., Chan, Queenie H. S., Russell, Sara S., Bates, Helena C., Bryson, James F. J., Clay, Patricia L., Vida, Denis, Lee, Martin R., O’Brien, Áine, Hallis, Lydia J., Stephen, Natasha R., Tartèse, Romain, Sansom, Eleanor K., Towner, Martin C., Cupak, Martin, Shober, Patrick M., Bland, Phil A., Findlay, Ross, Franchi, Ian A., Verchovsky, Alexander B., Abernethy, Feargus A. J., Grady, Monica M., Floyd, Cameron J., Van Ginneken, Matthias, Bridges, John, Hicks, Leon J., Jones, Rhian H., Mitchell, Jennifer T., Genge, Matthew J., Jenkins, Laura, Martin, Pierre-Etienne, Sephton, Mark A., Watson, Jonathan S., Salge, Tobias, Shirley, Katherine A., Curtis, Rowan J., Warren, Tristram J., Bowles, Neil E., Stuart, Finlay M., Di Nicola, Luigia, Györe, Domokos, Boyce, Adrian J., Shaw, Kathryn M. M., Elliott, Tim, Steele, Robert C. J., Povinec, Pavel, Laubenstein, Matthias, Sanderson, David, Cresswell, Alan, Jull, Anthony J. T., Sýkora, Ivan, Sridhar, Sanjana, Harrison, Richard J., Willcocks, Francesca M., Harrison, Catherine S., Hallatt, Daniel, Wozniakiewicz, Penny J., Burchell, Mark J., Alesbrook, Luke S., Dignam, Aishling, Almeida, Natasha V., Smith, Caroline L., Clark, Brett, Humphreys-Williams, Emma R., Schofield, Paul F., Cornwell, Luke T., Spathis, Vassilia, Morgan, Geraint H., Perkins, Mark J., Kacerek, Richard, Campbell-Burns, Peter, Colas, Francois, Zanda, Brigitte, Vernazza, Pierre, Bouley, Sylvain, Jeanne, Simon, Hankey, Mike, Collins, Gareth S., Young, John S., Shaw, Clive, Horak, Jana, Jones, Dave, James, Nick, Bosley, Steve, Shuttleworth, Alan, Dickinson, Paul, McMullan, Ian, Robson, Derek, Smedley, Andrew R. D., Stanley, Ben, Bassom, Richard, McIntyre, Mark, Suttle, Adam A., Fleet, Richard, Bastiaens, Luc, Ihász, Míra B., McMullan, Sarah, Boazman, Sarah J., Dickeson, Zach I., Grindrod, Peter M., Pickersgill, Annemarie E., Weir, Colin J., Suttle, Fiona M., Farrelly, Sarah, Spencer, Ieun, Naqvi, Sheeraz, Mayne, Ben, Skilton, Dan, Kirk, Dan, Mounsey, Ann, Mounsey, Sally E., Mounsey, Sarah, Godfrey, Pamela, Bond, Lachlan, Bond, Victoria, Wilcock, Cathryn, Wilcock, Hannah, Wilcock, Rob, King, Ashley J., Daly, Luke, Rowe, James, Joy, Katherine H., Greenwood, Richard C., Devillepoix, Hadrien A. R., Suttle, Martin D., Chan, Queenie H. S., Russell, Sara S., Bates, Helena C., Bryson, James F. J., Clay, Patricia L., Vida, Denis, Lee, Martin R., O’Brien, Áine, Hallis, Lydia J., Stephen, Natasha R., Tartèse, Romain, Sansom, Eleanor K., Towner, Martin C., Cupak, Martin, Shober, Patrick M., Bland, Phil A., Findlay, Ross, Franchi, Ian A., Verchovsky, Alexander B., Abernethy, Feargus A. J., Grady, Monica M., Floyd, Cameron J., Van Ginneken, Matthias, Bridges, John, Hicks, Leon J., Jones, Rhian H., Mitchell, Jennifer T., Genge, Matthew J., Jenkins, Laura, Martin, Pierre-Etienne, Sephton, Mark A., Watson, Jonathan S., Salge, Tobias, Shirley, Katherine A., Curtis, Rowan J., Warren, Tristram J., Bowles, Neil E., Stuart, Finlay M., Di Nicola, Luigia, Györe, Domokos, Boyce, Adrian J., Shaw, Kathryn M. M., Elliott, Tim, Steele, Robert C. J., Povinec, Pavel, Laubenstein, Matthias, Sanderson, David, Cresswell, Alan, Jull, Anthony J. T., Sýkora, Ivan, Sridhar, Sanjana, Harrison, Richard J., Willcocks, Francesca M., Harrison, Catherine S., Hallatt, Daniel, Wozniakiewicz, Penny J., Burchell, Mark J., Alesbrook, Luke S., Dignam, Aishling, Almeida, Natasha V., Smith, Caroline L., Clark, Brett, Humphreys-Williams, Emma R., Schofield, Paul F., Cornwell, Luke T., Spathis, Vassilia, Morgan, Geraint H., Perkins, Mark J., Kacerek, Richard, Campbell-Burns, Peter, Colas, Francois, Zanda, Brigitte, Vernazza, Pierre, Bouley, Sylvain, Jeanne, Simon, Hankey, Mike, Collins, Gareth S., Young, John S., Shaw, Clive, Horak, Jana, Jones, Dave, James, Nick, Bosley, Steve, Shuttleworth, Alan, Dickinson, Paul, McMullan, Ian, Robson, Derek, Smedley, Andrew R. D., Stanley, Ben, Bassom, Richard, McIntyre, Mark, Suttle, Adam A., Fleet, Richard, Bastiaens, Luc, Ihász, Míra B., McMullan, Sarah, Boazman, Sarah J., Dickeson, Zach I., Grindrod, Peter M., Pickersgill, Annemarie E., Weir, Colin J., Suttle, Fiona M., Farrelly, Sarah, Spencer, Ieun, Naqvi, Sheeraz, Mayne, Ben, Skilton, Dan, Kirk, Dan, Mounsey, Ann, Mounsey, Sally E., Mounsey, Sarah, Godfrey, Pamela, Bond, Lachlan, Bond, Victoria, Wilcock, Cathryn, Wilcock, Hannah, and Wilcock, Rob
Abstract: Direct links between carbonaceous chondrites and their parent bodies in the solar system are rare. The Winchcombe meteorite is the most accurately recorded carbonaceous chondrite fall. Its pre-atmospheric orbit and cosmic-ray exposure age confirm that it arrived on Earth shortly after ejection from a primitive asteroid. Recovered only hours after falling, the composition of the Winchcombe meteorite is largely unmodified by the terrestrial environment. It contains abundant hydrated silicates formed during fluid-rock reactions, and carbon- and nitrogen-bearing organic matter including soluble protein amino acids. The near-pristine hydrogen isotopic composition of the Winchcombe meteorite is comparable to the terrestrial hydrosphere, providing further evidence that volatile-rich carbonaceous asteroids played an important role in the origin of Earth’s water.

31. Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure.

Author: Ross, Catherine H., Stockli, Daniel F., Rasmussen, Cornelia, Gulick, Sean P. S., de Graaff, Sietze J., Claeys, Philippe, Jiawei Zhao, Long Xiao, Pickersgill, Annemarie E., Schmieder, Martin, Kring, David A., Wittmann, Axel, and Morgan, Joanna V.
Subjects: *LASER ablation inductively coupled plasma mass spectrometry, *RARE earth metals, GONDWANA (Continent)
Abstract: Determining the nature and age of the 200-km-wide Chicxulub impact target rock is an essential step in advancing our understanding of the Maya Block basement. Few age constraints exist for the northern Maya Block crust, specifically the basement underlying the 66 Ma, 200 km-wide Chicxulub impact structure. The International Ocean Discovery Program-International Continental Scientific Drilling Program Expedition 364 core recovered a continuous section of basement rocks from the Chicxulub target rocks, which provides a unique opportunity to illuminate the pre-impact tectonic evolution of a terrane key to the development of the Gulf of Mexico. Sparse published ages for the Maya Block point to Mesoproterozoic, Ediacaran, Ordovician to Devonian crust are consistent with plate reconstruction models. In contrast, granitic basement recovered from the Chicxulub peak ring during Expedition 364 yielded new zircon U-Pb laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) concordant dates clustering around 334 ± 2.3 Ma. Zircon rare earth element (REE) chemistry is consistent with the granitoids having formed in a continental arc setting. Inherited zircon grains fall into three groups: 400-435 Ma, 500-635 Ma, and 940-1400 Ma, which are consistent with the incorporation of Peri-Gondwanan, Pan-African, and Grenvillian crust, respectively. Carboniferous U-Pb ages, trace element compositions, and inherited zircon grains indicate a pre-collisional continental volcanic arc located along the Maya Block's northern margin before NW Gondwana collided with Laurentia. The existence of a continental arc along NW Gondwana suggests southward-directed subduction of Rheic oceanic crust beneath the Maya Block and is similar to evidence for a continental arc along the northern margin of Gondwana that is documented in the Suwannee terrane, Florida, USA, and Coahuila Block of NE México [ABSTRACT FROM AUTHOR]
Published: 2022
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31 results on '"Pickersgill, Annemarie E."'

1. Shock effects in feldspars: An overview

2. Rapid recovery of life at ground zero of the end-Cretaceous mass extinction

3. Revisiting the Gow Lake impact structure, Saskatchewan, Canada

4. The Winchcombe meteorite, a unique and pristine witness from the outer solar system

5. Impact Earth: A review of the terrestrial impact record

6. Impact-generated hydrothermal systems on Earth and Mars

7. Shock-deformed zircon from the Chicxulub impact crater and implications for cratering process

8. The Boltysh impact structure: An early Danian impact event during recovery from the K-Pg mass extinction

9. Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure

10. Globally distributed iridium layer preserved within the Chicxulub impact structure

11. Winding down the Chicxulub impact: The transition between impact and normal marine sedimentation near ground zero

12. Probing the hydrothermal system of the Chicxulub impact crater

13. Probing the hydrothermal system of the Chicxulub impact crater

14. Shock metamorphism in plagioclase and selective amorphization

15. The first day of the Cenozoic

16. Impact-induced porosity and micro-fracturing at the Chicxulub impact structure

17. New shock microstructures in titanite (CaTiSiO5) from the peak ring of the Chicxulub impact structure, Mexico

18. Peering inside the peak ring of the Chicxulub Impact Crater-its nature and formation mechanism

19. Ocean Drilling Perspectives on Meteorite Impacts

20. Rock fluidization during peak-ring formation of large impact structures

21. Ocean Drilling Perspectives on Meteorite Impacts

22. Drilling-induced and logging-related features illustrated from IODP–ICDP Expedition 364 downhole logs and borehole imaging tools

23. Rapid recovery of life at ground zero of the end-Cretaceous mass extinction

24. Chicxulub and the Exploration of Large Peak-Ring Impact Craters through Scientific Drilling

25. Shock Metamorphic Effects in Lunar and Terrestrial Plagioclase Feldspar Investigated by Optical Petrography and Micro-X-Ray Diffraction

26. Toward quantification of strain-related mosaicity in shocked lunar and terrestrial plagioclase by in situ micro-X-ray diffraction

27. Shock effects in plagioclase feldspar from the Mistastin Lake impact structure, Canada

28. Impact-generated hydrothermal systems on Earth and Mars

29. Impact-generated hydrothermal systems on Earth and Mars

30. The Winchcombe meteorite, a unique and pristine witness from the outer solar system

31. Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure.

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31 results on '"Pickersgill, Annemarie E."'

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