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1. Atmospheric collection of extraterrestrial dust at the Earth's surface in the mid‐Pacific.

Author

Wozniakiewicz, Penelope J., Alesbrook, Luke S., Bradley, John P., Ishii, Hope A., Price, Mark C., Zolensky, Michael. E., Brownlee, Donald E., van Ginneken, Matthias, and Genge, Matthew J.

Subjects
*SPHERULES (Geology), *SURFACE of the earth, *COAL-fired power plants, *COAL ash, *NATURAL numbers
Abstract

The Kwajalein micrometeorite collection utilized high volume air samplers fitted with polycarbonate membrane filters to capture particles directly from the atmosphere at the Earth's surface. This initial study focused on identifying cosmic spherule‐like particles, conservatively categorizing them into four groups based on bulk compositional data: Group I exhibit a range of compositions designated terrestrial in origin; group II are Fe‐rich and contain only additional O, S, and/or Ni; group III are silicate spherules with Mg‐to‐Si At% ratios less than 0.4; group IV are silicate spherules with Mg‐to‐Si At% ratios greater than 0.4. Spherules in groups I, II, and III have compositions that are also consistent with particles that are produced in great numbers by natural and/or anthropogenic terrestrial activities (e.g., volcanic microspherules, fly ash from coal fired power plants, etc.) and thus are assumed terrestrial in origin. Group IV spherules exhibit compositions closest to those of cosmic spherules identified in other collections and are, therefore, designated cosmic spherule candidates. Detailed analysis of seven group IV spherules found that whilst five exhibited morphology and compositions consistent with S‐type cosmic spherules, two appear unique to this collection and could not be matched to either terrestrial or extraterrestrial spherules studied to date. [ABSTRACT FROM AUTHOR]

Published
2024
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2. 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
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3. Palladium-coated kapton for use on dust detectors in low earth orbit: Performance under hypervelocity impact and atomic oxygen exposure

Author

Dignam, Aishling, primary, Wozniakiewicz, Penelope J., additional, Burchell, Mark J., additional, Alesbrook, Luke S., additional, Tighe, Adrian, additional, Suliga, Agnieszka, additional, Wessing, Johanna, additional, Kearsley, Anton, additional, Bridges, John, additional, Holt, John, additional, Howie, Stuart, additional, Peatman, Libby, additional, and Fitzpatrick, Dennis, additional

Published
2022
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5. Analysis of Impact Craters Using Optical Coherence Tomography

Author

Alesbrook, Luke S, Marques, M.J., New, James, Harriss, K.H., and Podoleanu, Adrian G.H.

Subjects
genetic structures, sense organs, QC355, eye diseases, QB
Abstract

We present our work on the use of OCT to analyse impact samples.

Published
2019

6. Impact flash evolution of CO2 ice, water ice, and frozen Martian and lunar regolith simulant targets.

Author

Tandy, Jon D., Price, Mark C., Wozniakiewicz, Penny J., Cole, Mike J., Alesbrook, Luke S., and Avdellidou, Chrysa

Subjects
LUNAR soil, ICE, MARTIAN surface, MOLECULAR spectra, DIGITAL cameras, REGOLITH, PLUMES (Fluid dynamics), LUNAR craters
Abstract

The wavelength dependence and temporal evolution of the hypervelocity impact self‐luminous plume (or "flash") from CO2 ice, water ice, and frozen Martian and lunar regolith simulant targets have been investigated using the Kent two‐stage light‐gas gun. An array of 10 band‐pass filtered photodiodes and a digital camera monitored changes in the impact flash intensity during the different phases of the emitting ejecta. Early‐time emission spectra were also recorded to examine short‐lived chemical species within the ejecta. Analyses of the impact flash from the varied frozen targets show considerable differences in temporal behavior, with a strong wavelength dependence observed within monitored near‐UV to near‐IR spectral regions. Emission spectra showed molecular bands across the full spectral range observed, primarily due to AlO from the projectile, and with little or no contribution from vaporized metal oxides originating from frozen regolith simulant targets. Additional features within the impact flash decay profiles and emission spectra indicate an inhomogeneity in the impact ejecta composition. A strong correlation between the density of water ice‐containing targets and the impact flash rate of decay was shown for profiles uninfluenced by significant atomic/molecular emission, although the applicability to other target materials is currently unknown. Changes in impact speed resulted in considerable differences in the temporal evolution of the impact flash, with additional variations observed between recorded spectral regions. A strong correlation between the impact speed and the emission decay rate was also shown for CO2 ice targets. These results may have important implications for future analyses of impact flashes both on the lunar/Martian surface and on other frozen bodies within the solar system. [ABSTRACT FROM AUTHOR]

Published
2020
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7. Brecciation at the grain scale within the lithologies of the Winchcombe Mighei‐like carbonaceous chondrite

Author

Daly, Luke, Suttle, Martin D., Lee, Martin R., Bridges, John, Hicks, Leon, Martin, Pierre‐Etienne M. C., Floyd, Cameron J., Jenkins, Laura E., Salge, Tobias, King, Ashley J., Almeida, Natasha V., Johnson, Diane, Trimby, Patrick W., Mansour, Haithem, Wadsworth, Fabian B., Rollinson, Gavyn, Genge, Matthew J., Darling, James, Bagot, Paul A. J., White, Lee F., Stephen, Natasha R., Mitchell, Jennifer T., Griffin, Sammy, Willcocks, Francesca M., Jones, Rhian, Piazolo, Sandra, Einsle, Joshua F., Macente, Alice, Hallis, Lydia J., O'Brien, Aine, Schofield, Paul F., Russell, Sara S., Bates, Helena, Smith, Caroline, Franchi, Ian, Forman, Lucy V., Bland, Phil A., Westmoreland, David, Anderson, Iain, Taylor, Richard, Montgomery, Mark, Parsons, Mark, Vasseur, Jérémie, van Ginneken, Matthias, Wozniakiewicz, Penelope J., Burchell, Mark J., Hallatt, Daniel, Alesbrook, Luke S., Spathis, Vassilia, Worden, Richard, Behnsen, Julie, Black, Kate, Daly, Luke, Suttle, Martin D., Lee, Martin R., Bridges, John, Hicks, Leon, Martin, Pierre‐Etienne M. C., Floyd, Cameron J., Jenkins, Laura E., Salge, Tobias, King, Ashley J., Almeida, Natasha V., Johnson, Diane, Trimby, Patrick W., Mansour, Haithem, Wadsworth, Fabian B., Rollinson, Gavyn, Genge, Matthew J., Darling, James, Bagot, Paul A. J., White, Lee F., Stephen, Natasha R., Mitchell, Jennifer T., Griffin, Sammy, Willcocks, Francesca M., Jones, Rhian, Piazolo, Sandra, Einsle, Joshua F., Macente, Alice, Hallis, Lydia J., O'Brien, Aine, Schofield, Paul F., Russell, Sara S., Bates, Helena, Smith, Caroline, Franchi, Ian, Forman, Lucy V., Bland, Phil A., Westmoreland, David, Anderson, Iain, Taylor, Richard, Montgomery, Mark, Parsons, Mark, Vasseur, Jérémie, van Ginneken, Matthias, Wozniakiewicz, Penelope J., Burchell, Mark J., Hallatt, Daniel, Alesbrook, Luke S., Spathis, Vassilia, Worden, Richard, Behnsen, Julie, and Black, Kate

Abstract

The Mighei‐like carbonaceous (CM) chondrites have been altered to various extents by water–rock reactions on their parent asteroid(s). This aqueous processing has destroyed much of the primary mineralogy of these meteorites, and the degree of alteration is highly heterogeneous at both the macroscale and nanoscale. Many CM meteorites are also heavily brecciated juxtaposing clasts with different alteration histories. Here we present results from the fine‐grained team consortium study of the Winchcombe meteorite, a recent CM chondrite fall that is a breccia and contains eight discrete lithologies that span a range of petrologic subtypes (CM2.0–2.6) that are suspended in a cataclastic matrix. Coordinated multitechnique, multiscale analyses of this breccia reveal substantial heterogeneity in the extent of alteration, even in highly aqueously processed lithologies. Some lithologies exhibit the full range and can comprise nearly unaltered coarse‐grained primary components that are found directly alongside other coarse‐grained components that have experienced complete pseudomorphic replacement by secondary minerals. The preservation of the complete alteration sequence and pseudomorph textures showing tochilinite–cronstedtite intergrowths are replacing carbonates suggest that CMs may be initially more carbonate rich than previously thought. This heterogeneity in aqueous alteration extent is likely due to a combination of microscale variability in permeability and water/rock ratio generating local microenvironments as has been established previously. Nevertheless, some of the disequilibrium mineral assemblages observed, such as hydrous minerals juxtaposed with surviving phases that are typically more fluid susceptible, can only be reconciled by multiple generations of alteration, disruption, and reaccretion of the CM parent body at the grain scale.

8. 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.

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