Search

Your search keyword '"Dennielou, B."' showing total 24 results
Start Over Author "Dennielou, B." Publication Year Range Last 10 years
24 results on '"Dennielou, B."'

10. Multidisciplinary Study of Marine Archives: Reconstruction of Sea-Level, Sediment Yields, Sediment Sources, Paleoclimate, Paleoceanography and Vertical Movement on Margins: Examples from the Western Mediterranean Sea

Author

Tectonics, Rabineau, M., Pellen, R., Pasquier, V., Bellucci, M., Badhani, S., Molliex, S., Garcia-Garcia, M., Leroux, E., Arab, M., Do Couto, D., Jouet, G., Bache, F., Gaudin, M., Lafosse, M., Miramontes, E., Lofi, J., dos Reis, T., Moulin, M., Schnurle, P., Poort, J., Dennielou, B., Afilhado, A., Popescu, S.-M., Bassetti, M.-A., Toucanne, S., Révillon, S., Cattaneo, A., Le Roy, P., d’Acremont, E., Granjeon, D., Gorini, C., Suc, J.-P., Cloetingh, S., Joseph, P., Guillocheau, F., Berné, S., Droz, L., Rubino, J.-L., Aslanian, D., Çiner, Attila, Grab, Stefan, Jaillard, Etienne, Doronzo, Domenico, Michard, André, Rabineau, Marina, Chaminé, Helder I., Tectonics, Rabineau, M., Pellen, R., Pasquier, V., Bellucci, M., Badhani, S., Molliex, S., Garcia-Garcia, M., Leroux, E., Arab, M., Do Couto, D., Jouet, G., Bache, F., Gaudin, M., Lafosse, M., Miramontes, E., Lofi, J., dos Reis, T., Moulin, M., Schnurle, P., Poort, J., Dennielou, B., Afilhado, A., Popescu, S.-M., Bassetti, M.-A., Toucanne, S., Révillon, S., Cattaneo, A., Le Roy, P., d’Acremont, E., Granjeon, D., Gorini, C., Suc, J.-P., Cloetingh, S., Joseph, P., Guillocheau, F., Berné, S., Droz, L., Rubino, J.-L., Aslanian, D., Çiner, Attila, Grab, Stefan, Jaillard, Etienne, Doronzo, Domenico, Michard, André, Rabineau, Marina, and Chaminé, Helder I.

Published
2022

11. Multidisciplinary Study of Marine Archives: Reconstruction of Sea-Level, Sediment Yields, Sediment Sources, Paleoclimate, Paleoceanography and Vertical Movement on Margins: Examples from the Western Mediterranean Sea

Author

Rabineau, M., Pellen, R., Pasquier, V., Bellucci, M., Badhani, S., Molliex, S., Garcia-Garcia, M., Leroux, E., Arab, M., Do Couto, D., Jouet, G., Bache, F., Gaudin, M., Lafosse, M., Miramontes, E., Lofi, J., dos Reis, T., Moulin, M., Schnurle, P., Poort, J., Dennielou, B., Afilhado, A., Popescu, S.-M., Bassetti, M.-A., Toucanne, S., Révillon, S., Cattaneo, A., Le Roy, P., d’Acremont, E., Granjeon, D., Gorini, C., Suc, J.-P., Cloetingh, S., Joseph, P., Guillocheau, F., Berné, S., Droz, L., Rubino, J.-L., Aslanian, D., Çiner, Attila, Grab, Stefan, Jaillard, Etienne, Doronzo, Domenico, Michard, André, Rabineau, Marina, Chaminé, Helder I., Tectonics, Laboratoire Géosciences Océan (LGO), Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Institut des Sciences de la Terre de Paris (iSTeP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Géosciences Rennes (GR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Attila Çiner, Stefan Grab, Etienne Jaillard, Domenico Doronzo, André Michard, Marina Rabineau, and Helder I. Chaminé (Eds.)

Subjects
Contourites, Isostasy, Sustainability and the Environment, Pliocene, Renewable Energy, Sustainability and the Environment, Sediment yields, Subsidence, Quaternary, Erosion, Messinian, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Architecture, Environmental Chemistry, Renewable Energy, Mass-transport, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, Sea-level
Abstract

International audience; The numerous processes (superficial and deep) occurring on margins, their origins, consequences, interactions and quantifications are only very partially described and understood. The identification of the relative role of factors is sometimes completely contradictory between authors. Here, we showed the results of a long-term multidecadal and multidisciplinary study (using geophysical, geological, stratigraphic, paleontological, geomorphologic, geochemical, microbiological and numerical models) in the Western Mediterranean Sea that acts as a natural laboratory at many different scales. We showed how sediments efficiently recorded at the same time: variations of glacio-eustatic sea-level changes, variations of sediments yield and sources, and also enabled quantifying vertical movements and geodynamic worldwide events but also detailed regional mass transport, turbidites and contourites deposits. They are also an archive of paleoclimatic, palaeoceanographic and diagenetic processes.

Published
2022

13. Monsoon control on channel avulsions in the Late Quaternary Congo Fan

Author

Picot, M., Marsset, T., Droz, L., Dennielou, B., Baudin, F., Hermoso, M., de Rafélis, M., Sionneau, T., Cremer, M., Laurent, D., Bez, M., Laboratoire Géosciences Océan (LGO), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Department of Earth Sciences [Oxford], University of Oxford [Oxford], Géosciences Environnement Toulouse (GET), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD), Max-Planck-Institut für Extraterrestrische Physik (MPE), TOTAL-Scientific and Technical Center Jean Féger (CSTJF), TOTAL FINA ELF, ISBlue - Interdisciplinary Graduate School for the Blue planet (2017), ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017), Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), University of Oxford, Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), and Centre scientifique et Technique Jean Feger (CSTJF)

Subjects
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology, [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology, ComputingMilieux_MISCELLANEOUS, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Abstract

International audience

Published
2019

14. Consistently dated Atlantic sediment cores over the last 40 thousand years

Author

Waelbroeck, C, Lougheed, BC, Vazquez Riveiros, N, Missiaen, L, Pedro, J, Dokken, T, Hajdas, I, Wacker, L, Abbott, P, Dumoulin, JP, Thil, F, Eynaud, F, Rossignol, L, Fersi, W, Albuquerque, AL, Arz, H, Austin, WEN, Came, R, Carlson, AE, Collins, JA, Dennielou, B, Desprat, S, Dickson, A, Elliot, M, Farmer, C, Giraudeau, J, Gottschalk, J, Henderiks, J, Hughen, K, Jung, S, Knutz, P, Lebreiro, S, Lund, DC, Lynch-Stieglitz, J, Malaizé, B, Marchitto, T, Martínez-Méndez, G, Mollenhauer, G, Naughton, F, Nave, S, Nürnberg, D, Oppo, D, Peck, V, Peeters, FJC, Penaud, A, Portilho-Ramos, RDC, Repschläger, J, Roberts, J, Rühlemann, C, Salgueiro, E, Sanchez Goni, MF, Schönfeld, J, Scussolini, P, Skinner, LC, Skonieczny, C, Thornalley, D, Toucanne, S, Rooij, DV, Vidal, L, Voelker, AHL, Wary, M, Weldeab, S, Ziegler, M, Waelbroeck, C, Lougheed, BC, Vazquez Riveiros, N, Missiaen, L, Pedro, J, Dokken, T, Hajdas, I, Wacker, L, Abbott, P, Dumoulin, JP, Thil, F, Eynaud, F, Rossignol, L, Fersi, W, Albuquerque, AL, Arz, H, Austin, WEN, Came, R, Carlson, AE, Collins, JA, Dennielou, B, Desprat, S, Dickson, A, Elliot, M, Farmer, C, Giraudeau, J, Gottschalk, J, Henderiks, J, Hughen, K, Jung, S, Knutz, P, Lebreiro, S, Lund, DC, Lynch-Stieglitz, J, Malaizé, B, Marchitto, T, Martínez-Méndez, G, Mollenhauer, G, Naughton, F, Nave, S, Nürnberg, D, Oppo, D, Peck, V, Peeters, FJC, Penaud, A, Portilho-Ramos, RDC, Repschläger, J, Roberts, J, Rühlemann, C, Salgueiro, E, Sanchez Goni, MF, Schönfeld, J, Scussolini, P, Skinner, LC, Skonieczny, C, Thornalley, D, Toucanne, S, Rooij, DV, Vidal, L, Voelker, AHL, Wary, M, Weldeab, S, and Ziegler, M

Abstract

Rapid changes in ocean circulation and climate have been observed in marine-sediment and ice cores over the last glacial period and deglaciation, highlighting the non-linear character of the climate system and underlining the possibility of rapid climate shifts in response to anthropogenic greenhouse gas forcing. To date, these rapid changes in climate and ocean circulation are still not fully explained. One obstacle hindering progress in our understanding of the interactions between past ocean circulation and climate changes is the difficulty of accurately dating marine cores. Here, we present a set of 92 marine sediment cores from the Atlantic Ocean for which we have established age-depth models that are consistent with the Greenland GICC05 ice core chronology, and computed the associated dating uncertainties, using a new deposition modeling technique. This is the first set of consistently dated marine sediment cores enabling paleoclimate scientists to evaluate leads/lags between circulation and climate changes over vast regions of the Atlantic Ocean. Moreover, this data set is of direct use in paleoclimate modeling studies.

Published
2019

16. The Congolobe project, a multidisciplinary study of Congo deep-sea fan lobe complex: Overview of methods, strategies, observations and sampling

Author

Rabouille, C., primary, Olu, K., additional, Baudin, F., additional, Khripounoff, A., additional, Dennielou, B., additional, Arnaud-Haond, S., additional, Babonneau, N., additional, Bayle, C., additional, Beckler, J., additional, Bessette, S., additional, Bombled, B., additional, Bourgeois, S., additional, Brandily, C., additional, Caprais, J.C., additional, Cathalot, C., additional, Charlier, K., additional, Corvaisier, R., additional, Croguennec, C., additional, Cruaud, P., additional, Decker, C., additional, Droz, L., additional, Gayet, N., additional, Godfroy, A., additional, Hourdez, S., additional, Le Bruchec, J., additional, Saout, J., additional, Le Saout, M., additional, Lesongeur, F., additional, Martinez, P., additional, Mejanelle, L., additional, Michalopoulos, P., additional, Mouchel, O., additional, Noel, P., additional, Pastor, L., additional, Picot, M., additional, Pignet, P., additional, Pozzato, L., additional, Pruski, A.M., additional, Rabiller, M., additional, Raimonet, M., additional, Ragueneau, O., additional, Reyss, J.L., additional, Rodier, P., additional, Ruesch, B., additional, Ruffine, L., additional, Savignac, F., additional, Senyarich, C., additional, Schnyder, J., additional, Sen, A., additional, Stetten, E., additional, Sun, Ming Yi, additional, Taillefert, M., additional, Teixeira, S., additional, Tisnerat-Laborde, N., additional, Toffin, L., additional, Tourolle, J., additional, Toussaint, F., additional, Vétion, G., additional, Jouanneau, J.M., additional, and Bez, M., additional

Published
2017
Full Text
View/download PDF

20. Rare earth elements and neodymium isotopes in world river sediments revisited

Author

Bayon, G., primary, Toucanne, S., additional, Skonieczny, C., additional, André, L., additional, Bermell, S., additional, Cheron, S., additional, Dennielou, B., additional, Etoubleau, J., additional, Freslon, N., additional, Gauchery, T., additional, Germain, Y., additional, Jorry, S.J., additional, Ménot, G., additional, Monin, L., additional, Ponzevera, E., additional, Rouget, M.-L., additional, Tachikawa, K., additional, and Barrat, J.A., additional

Published
2015
Full Text
View/download PDF

22. Holocene hydrological changes of the Rhone River (NW Mediterranean) as recorded in the marine mud belt.

Author

Bassetti, M. A., Berné, S., Sicre, M. A., Dennielou, B., Alonso, Y., Buscail, R., Jalali, B., Hebert, B., and Menniti, C.

Abstract

Expanded marine Holocene archives are relatively scarce in the Mediterranean Sea because most of the sediments were trapped in catchment areas during this period. Mud belts are most suitable targets to access expanded Holocene records. These sedimentary bodies represent excellent archives for the study of sea-land interactions and notably the impact of the hydrological activity on sediment accumulation. We retrieved a 7.2 m-long sediment core from the Rhone mud belt in the Gulf of Lions in an area where the average accumulation rate is of ca. 0.70 m/1000 years. This core thus provides a continuous and high-resolution record of the last 10 ka cal BP. A multi-proxy dataset (XRF-core scan, 14C dates, grain size and organic matter analysis) combined with seismic stratigraphic analysis was used to document decadal to centennial changes of the Rhone hydrological activity. Our results show that 1) the Early Holocene was characterized by high sediment delivery likely indicative of local intense (but short duration) rainfall events , 2) important sediment delivery around 7 ka cal BP roughly presumably related to increased river flux, 3) a progressive increase of continental/marine input during the Mid-Holocene despite increased distance from river outlets due to sea-level rise possibly related to higher atmospheric humidity caused by the southward migration of the storm tracks in the North Atlantic, 4) multi-decadal to centennial humid events in the Late Holocene. Some of these events correspond to the cold periods identified in the North Atlantic (Little Ice Age, LIA; Dark Age) and also coincide with time intervals of major floods a in the Northern Alps. Other humid events are also observed during relatively warm periods (Roman Humid Period and Medieval Climate Anomaly). [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

23. The Congo deep-sea fan: Mineralogical, REE, and Nd-isotope variability in quartzose passive-margin sand

Author

Mara Limonta, Eduardo Garzanti, Bernard Dennielou, Giovanni Vezzoli, Germain Bayon, Marta Barbarano, Garzanti, E, Bayon, G, Dennielou, B, Barbarano, M, Limonta, M, and Vezzoli, G

Subjects
Provenance analysi, Quartz-rich passive-margin turbidite, Durability of detrital feldspar, Variability of Nd model ages, 010504 meteorology & atmospheric sciences, Isotope, Weathering and recycling, Geochemistry, Geology, Raman counting, 010502 geochemistry & geophysics, 01 natural sciences, Deep sea, Variability of Nd value, 13. Climate action, Passive margin, 14. Life underwater, Mineral contributions to REE budget, Grain-size control, 0105 earth and related environmental sciences
Abstract

The Congo deep-sea fan, the largest on Earth fed entirely with anorogenic detritus, is characterized by quartzose to pure quartzose sand, reflecting multiple recycling coupled with extreme chemical weathering in cratonic equatorial Africa. The very youthful lower course of the Congo River connects directly to a steep canyon, where detritus including quartz grains up to a few millimeters in diameter is funneled towards Atlantic Ocean floors and deposited at abyssal depths more than a thousand kilometers away from shore. This article illustrates for the first time in detail the mineralogical and geochemical signatures of Congo Fan sands and discusses the factors controlling their intersample and intrasample variability as a key to understand how sediment is generated, recycled, and finally transferred to the deep sea. Compositional variability is largely grain-size-dependent. Combined petrographic and Raman spectroscopy analyses demonstrate that quartz increases in coarser samples and size classes, whereas feldspars are concentrated in finer sizes, plagioclase relative to K-feldspar and orthoclase relative to microcline, defining an order of mechanical and chemical durability among detrital tectosilicates. Because of overwhelming quartz abundance and very low heavy-mineral concentration, quartz contributes significantly to the REE budget and up to 40–50% of Nd in coarser samples, characterized by εNd values as low as –21. The strong grain-size-dependent variability of εNd suggests that quartz carries a markedly more negative εNd signature than monazite and other detrital components. This is chiefly ascribed to the durability of quartz grains, able to survive repeated cycles of weathering and diagenesis through Proterozoic and Phanerozoic time better than all other minerals. Neodymium model ages are influenced less by grain size and quartz abundance but more by the Sm/Nd ratio of different detrital components, and samples hydrodynamically enriched in LREE-rich minerals display TNd,CHUR and TNd,DM ages 1.2–1.4 Ga younger than samples enriched in HREE minerals. Not all detritus in the Congo Fan is supplied transversally by the Congo River. Forward-mixing calculations based on mineralogical data indicate that sand entrained northward by longshore currents mixes progressively with Congo River sand along the northernmost Angola coast, penetrates in the Soyo estuary, and is eventually captured in the canyon and transferred to the deep-sea fan, where it is estimated to represents 7 ± 2% of turbidite deposits.

Published
2021

24. Consistently dated Atlantic sediment cores over the last 40 thousand years.

Author

Waelbroeck C, Lougheed BC, Vazquez Riveiros N, Missiaen L, Pedro J, Dokken T, Hajdas I, Wacker L, Abbott P, Dumoulin JP, Thil F, Eynaud F, Rossignol L, Fersi W, Albuquerque AL, Arz H, Austin WEN, Came R, Carlson AE, Collins JA, Dennielou B, Desprat S, Dickson A, Elliot M, Farmer C, Giraudeau J, Gottschalk J, Henderiks J, Hughen K, Jung S, Knutz P, Lebreiro S, Lund DC, Lynch-Stieglitz J, Malaizé B, Marchitto T, Martínez-Méndez G, Mollenhauer G, Naughton F, Nave S, Nürnberg D, Oppo D, Peck V, Peeters FJC, Penaud A, Portilho-Ramos RDC, Repschläger J, Roberts J, Rühlemann C, Salgueiro E, Sanchez Goni MF, Schönfeld J, Scussolini P, Skinner LC, Skonieczny C, Thornalley D, Toucanne S, Rooij DV, Vidal L, Voelker AHL, Wary M, Weldeab S, and Ziegler M

Abstract

Rapid changes in ocean circulation and climate have been observed in marine-sediment and ice cores over the last glacial period and deglaciation, highlighting the non-linear character of the climate system and underlining the possibility of rapid climate shifts in response to anthropogenic greenhouse gas forcing. To date, these rapid changes in climate and ocean circulation are still not fully explained. One obstacle hindering progress in our understanding of the interactions between past ocean circulation and climate changes is the difficulty of accurately dating marine cores. Here, we present a set of 92 marine sediment cores from the Atlantic Ocean for which we have established age-depth models that are consistent with the Greenland GICC05 ice core chronology, and computed the associated dating uncertainties, using a new deposition modeling technique. This is the first set of consistently dated marine sediment cores enabling paleoclimate scientists to evaluate leads/lags between circulation and climate changes over vast regions of the Atlantic Ocean. Moreover, this data set is of direct use in paleoclimate modeling studies.

Published
2019
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results