Search

Your search keyword '"Ocampo-Torres, R."' showing total 6 results
Start Over Author "Ocampo-Torres, R." Topic 13. climate action
6 results on '"Ocampo-Torres, R."'

1. High-resolution microstructural and compositional analyses of shock deformed apatite from the peak ring of the Chicxulub impact crater

Author

Cox, Morgan A., Erickson, Timmons M., Schmieder, Martin, Christoffersen, Roy, Ross, Daniel K., Cavosie, Aaron J., Bland, Phil A., Kring, David A., Gulick, Sean, Morgan, Joanna V., Carter, G., Chenot, E., Christeson, Gail, Claeys, Ph, Cockell, C., Coolen, M. J.L., Ferrière, L., Gebhardt, C., Goto, K., Jones, H., Kring, D. A., Lofi, J., Lowery, C., Ocampo-Torres, R., Perez-Cruz, L., Pickersgill, A., Poelchau, M., Rae, A., Rasmussen, C., Rebolledo-Vieyra, M., Riller, U., Sato, H., Smit, Jan, Tikoo, S., Tomioka, N., Whalen, M., Wittmann, A., Urrutia-Fucugauchi, J., Yamaguchi, K. E., Analytical, Environmental & Geo-Chemistry, Earth System Sciences, Chemistry, RC Academic Unit, Geology and Geochemistry, Imperial College London, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), and 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)

Subjects
010504 meteorology & atmospheric sciences, geophysics, High resolution, Mineralogy, 010502 geochemistry & geophysics, Ring (chemistry), 01 natural sciences, Apatite, Shock (mechanics), Impact crater, [SDU]Sciences of the Universe [physics], 13. Climate action, Space and Planetary Science, visual_art, visual_art.visual_art_medium, ComputingMilieux_MISCELLANEOUS, Geology, 0105 earth and related environmental sciences
Abstract

The mineral apatite, Ca5(PO4)3(F,Cl,OH), is a ubiquitous accessory mineral, with its volatile content and isotopic compositions used to interpret the evolution of H2O on planetary bodies. During hypervelocity impact, extreme pressures shock target rocks resulting in deformation of minerals; however, relatively few microstructural studies of apatite have been undertaken. Given its widespread distribution in the solar system, it is important to understand how apatite responds to progressive shock metamorphism. Here, we present detailed microstructural analyses of shock deformation in ~560 apatite grains throughout ~550 m of shocked granitoid rock from the peak ring of the Chicxulub impact structure, Mexico. A combination of high-resolution backscattered electron (BSE) imaging, electron backscatter diffraction mapping, transmission Kikuchi diffraction mapping, and transmission electron microscopy is used to characterize deformation within apatite grains. Systematic, crystallographically controlled deformation bands are present within apatite, consistent with tilt boundaries that contain the 'c' (axis) and result from slip in ' (Formula presented.) ' (direction) on (Formula presented.) (plane) during shock deformation. Deformation bands contain complex subgrain domains, isolated dislocations, and low-angle boundaries of ~1° to 2°. Planar fractures within apatite form conjugate sets that are oriented within either { (Formula presented.), { (Formula presented.), { (Formula presented.), or (Formula presented.). Complementary electron microprobe analyses (EPMA) of a subset of recrystallized and partially recrystallized apatite grains show that there is an apparent change in MgO content in shock-recrystallized apatite compositions. This study shows that the response of apatite to shock deformation can be highly variable, and that application of a combined microstructural and chemical analysis workflow can reveal complex deformation histories in apatite grains, some of which result in changes to crystal structure and composition, which are important for understanding the genesis of apatite in both terrestrial and extraterrestrial environments.

Published
2020
Full Text
View/download PDF

2. Early Paleocene Paleoceanography and Export Productivity in the Chicxulub Crater

Author

Lowery C.M., Jones H.L., Bralower T.J., Cruz L.P., Gebhardt C., Whalen M.T., Chenot E., Smit J., Phillips M.P., Choumiline K., Arenillas I., Arz J.A., Garcia F., Ferrand M., Gulick S.P.S., Christeson G., Claeys P., Cockell C., Coolen M., Ferrière L., Goto K., Green S., Grice K., Kring D., Lofi J., Mellett C., Morgan J., Ocampo-Torres R., Pickersgill A., Poelchau M., Rae A., Rasmussen C., Rebolledo-Vieyra M., Riller U., Sato H., Schaefer B., Tikoo S., Tomioka N., Urrutia-Fucugauchi J., Wittmann A., Xiao L., Yamaguchi K., Zylberman W., Expedition 364 Science Party, Institute for Geophysics, University of Texas, University of Texas at Austin [Austin], 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, Center for Marine Environmental Sciences [Bremen] (MARUM), Universität Bremen, Instituto de Geofisica [Mexico], Universidad Nacional Autónoma de México (UNAM), Alfred Wegener Institute for Polar and Marine Research (AWI), Department of Geosciences, University of Alaska [Fairbanks] (UAF), 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), Institut Polytechnique LaSalle Beauvais, Faculty of Earth and Life Sciences [Amsterdam] (FALW), Vrije Universiteit Amsterdam [Amsterdam] (VU), Department of Earth Sciences [Riverside], University of California [Riverside] (UCR), University of California-University of California, Departamento de Ciencias de la Tierra, University of Zaragoza - Universidad de Zaragoza [Zaragoza], Instituto Universitario en investigación en Ciencias Ambientales de Aragón (IUCA), 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), Department of Geological Sciences [Austin], Jackson School of Geosciences (JSG), University of Texas at Austin [Austin]-University of Texas at Austin [Austin], Center for Planetary Systems Habitability, University of Texas at Austin [Austin]-Jackson School of Geosciences, and Geology and Geochemistry

Subjects
bepress|Physical Sciences and Mathematics|Earth Sciences|Paleontology, bepress|Physical Sciences and Mathematics, bepress|Physical Sciences and Mathematics|Earth Sciences|Sedimentology, 010506 paleontology, Atmospheric Science, 010504 meteorology & atmospheric sciences, bepress|Physical Sciences and Mathematics|Earth Sciences, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences, 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, Foraminifera, Water column, Impact crater, Paleoceanography, Phytoplankton, Photic zone, 14. Life underwater, SDG 14 - Life Below Water, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Sedimentology, 0105 earth and related environmental sciences, biology, Terrigenous sediment, Paleontology, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Geochemistry, 15. Life on land, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Paleontology, biology.organism_classification, humanities, EarthArXiv|Physical Sciences and Mathematics, Productivity (ecology), 13. Climate action, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Environmental science, bepress|Physical Sciences and Mathematics|Earth Sciences|Geochemistry
Abstract

The Chicxulub impact caused a crash in productivity in the world''s oceans which contributed to the extinction of ~75% of marine species. In the immediate aftermath of the extinction, export productivity was locally highly variable, with some sites, including the Chicxulub crater, recording elevated export production. The long-term transition back to more stable export productivity regimes has been poorly documented. Here, we present elemental abundances, foraminifer and calcareous nannoplankton assemblage counts, total organic carbon, and bulk carbonate carbon isotope data from the Chicxulub crater to reconstruct changes in export productivity during the first 3 Myr of the Paleocene. We show that export production was elevated for the first 320 kyr of the Paleocene, declined from 320 kyr to 1.2 Myr, and then remained low thereafter. A key interval in this long decline occurred 900 kyr to 1.2 Myr post impact, as calcareous nannoplankton assemblages began to diversify. This interval is associated with fluctuations in water column stratification and terrigenous flux, but these variables are uncorrelated to export productivity. Instead, we postulate that the turnover in the phytoplankton community from a post-extinction assemblage dominated by picoplankton (which promoted nutrient recycling in the euphotic zone) to a Paleocene pelagic community dominated by relatively larger primary producers like calcareous nannoplankton (which more efficiently removed nutrients from surface waters, leading to oligotrophy) is responsible for the decline in export production in the southern Gulf of Mexico. © 2021. American Geophysical Union. All Rights Reserved.

Published
2021
Full Text
View/download PDF

3. A steeply-inclined trajectory for the Chicxulub impact

Author

Collins, G. S., Patel, N., Davison, T. M., Rae, A. S. P., Morgan, J. V., Gulick, S. P. S., Christeson, G. L., Chenot, E., Claeys, P., Cockell, C. S., Coolen, M. J. L., Ferrière, L., Gebhardt, C., Goto, K., Jones, H., Kring, D. A., Lofi, J., Lowery, C. M., Ocampo-Torres, R., Perez-Cruz, L., Pickersgill, A. E., Poelchau, M. H., Rasmussen, C., Rebolledo-Vieyra, M., Riller, U., Sato, H., Smit, J., Tikoo, S. M., Tomioka, N., Urrutia-Fucugauchi, J., Whalen, M. T., Wittmann, A., Xiao, L., Yamaguchi, K. E., Artemieva, N., Bralower, T. J., Geology and Geochemistry, Department of Earth Science and Engineering [Imperial College London], Imperial College London, 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), Science and Technology Facilities Council (STFC), and Natural Environment Research Council (NERC)

Subjects
010504 meteorology & atmospheric sciences, Science, Impact angle, General Physics and Astronomy, 010502 geochemistry & geophysics, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, Article, Impact crater, EMPLACEMENT, DEFORMATION, CRATER, 10. No inequality, lcsh:Science, 0105 earth and related environmental sciences, Multidisciplinary, Science & Technology, Plane (geometry), ORIGIN, METEORITE, General Chemistry, ANGLE, Multidisciplinary Sciences, BOUNDARY, SIZE, Meteorite, PEAK-RING FORMATION, 13. Climate action, Asteroid, [SDU]Sciences of the Universe [physics], ASYMMETRY, Trajectory, Science & Technology - Other Topics, lcsh:Q, Third-Party Scientists, IODP-ICDP Expedition 364 Science Party, Asteroids, comets and Kuiper belt, Seismology, Geology
Abstract

The environmental severity of large impacts on Earth is influenced by their impact trajectory. Impact direction and angle to the target plane affect the volume and depth of origin of vaporized target, as well as the trajectories of ejected material. The asteroid impact that formed the 66 Ma Chicxulub crater had a profound and catastrophic effect on Earth’s environment, but the impact trajectory is debated. Here we show that impact angle and direction can be diagnosed by asymmetries in the subsurface structure of the Chicxulub crater. Comparison of 3D numerical simulations of Chicxulub-scale impacts with geophysical observations suggests that the Chicxulub crater was formed by a steeply-inclined (45–60° to horizontal) impact from the northeast; several lines of evidence rule out a low angle (, The authors here present a 3D model that simulates the formation of the Chicxulub impact crater. Based on asymmetries in the subsurface structure of the Chicxulub crater, the authors diagnose impact angle and direction and suggest a steeply inclined (60° to horizontal) impact from the northeast.

Published
2020
Full Text
View/download PDF

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

Author

Timms, NE, Pearce, MA, Erickson, TM, Cavosie, AJ, Rae, ASP, Wheeler, J, Wittmann, A, Ferriere, L, Poelchau, MH, Tomioka, N, Collins, GS, Gulick, SPS, Rasmussen, C, Morgan, JV, Chenot, E, Christeson, GL, Claeys, P, Cockell, CS, Coolen, MJL, Gebhardt, C, Goto, K, Green, S, Jones, H, Kring, DA, Lofi, J, Lowery, CM, Ocampo-Torres, R, Perez-Cruz, L, Pickersgill, AE, Rebolledo-Vieyra, M, Riller, U, Sato, H, Smit, J, Tikoo, SM, Urrutia-Fucugauchi, J, Whalen, MT, Xiao, L, Yamaguchi, KE, Curtin University [Perth], Planning and Transport Research Centre (PATREC), Australian Resources Research Centre, Kensington, NASA Johnson Space Center (JSC), NASA, Department of Earth Science and Technology [Imperial College London], Imperial College London, University of Liverpool, Arizona State University [Tempe] (ASU), Natural History Museum [Vienna] (NHM), Albert-Ludwigs-Universität Freiburg, Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Department of Earth Science and Engineering [Imperial College London], University of Texas at Austin [Austin], Géosciences Montpellier, Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Université de Montpellier (UM)-Institut national des sciences de l'Univers (INSU - CNRS), 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), Earth and Ocean Sciences, LeRoy Eyring Center for Solid State Science, Department of Geology, University of Freiburg [Freiburg], DGS, Jackson School of Geosciences, Institute of Geophysics [Austin] (IG), Analytical, Environmental & Geo-Chemistry, Earth System Sciences, Chemistry, and Natural Environment Research Council (NERC)

Subjects
Geochemistry & Geophysics, PLASTIC-DEFORMATION, 010504 meteorology & atmospheric sciences, EBSD, Shock metamorphism, Metamorphism, Titanite, U-PB, Titanite, Shock metamorphism, Mechanical twinning, Dislocation slip system, Meteorite impact, EBSD, Mechanical twinning, Slip (materials science), engineering.material, 010502 geochemistry & geophysics, 01 natural sciences, Geochemistry and Petrology, ELECTRON-BACKSCATTER DIFFRACTION, HIGH-PRESSURE, Meteorite impact, Planar deformation features, 0402 Geochemistry, [CHIM]Chemical Sciences, Petrology, ZIRCON, 0105 earth and related environmental sciences, Science & Technology, Energy, Mineralogy, Dislocation slip system, Baddeleyite, MONAZITE, Geophysics, 0403 Geology, [SDU]Sciences of the Universe [physics], 13. Climate action, Physical Sciences, [SDE]Environmental Sciences, PHASE-TRANSITION, REIDITE, engineering, VREDEFORT, Deformation bands, ORIENTATION, Geology, [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy, Zircon
Abstract

© 2019, Springer-Verlag GmbH Germany, part of Springer Nature. 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 (K 1 ) = ~ { 1 ¯ 11 } , and shear direction (η 1 ) = < 110 > , and less commonly with the mode K 1 = {130}, η 1 = ~ . 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 due to generally low (< 20 GPa) shock pressure.

Published
2019
Full Text
View/download PDF

5. Stress‐Strain Evolution During Peak‐Ring Formation: A Case Study of the Chicxulub Impact Structure

Author

Rae, Auriol, Collins, Gareth, Poelchau, Michael, Riller, Ulrich, Davison, Thomas, Grieve, Richard, Osinski, Gordon, Morgan, Joanna, Gulick, S. P. S., Chenot, Elise, Christeson, G. L., Claeys, P., Cockell, C. S., Coolen, M. J. L., Ferrière, L., Gebhardt, C., Goto, K., Green, S., Jones, H., Kring, D. A., Lofi, Johanna, Lowery, C. M., Ocampo‐Torres, R., Perez‐Cruz, L., Pickersgill, A. E., Rasmussen, C., Rae, A.S.P., Rebolledo‐Vieyra, M., Sato, H., Smit, J., Tikoo, S. M., Tomioka, N., Urrutia‐Fucugauchi, J., Whalen, M. T., Wittmann, A., Xiao, L., Yamaguchi, K. E., Department of Earth Science and Engineering [Imperial College London], Imperial College London, University of Freiburg [Freiburg], Universität Hamburg (UHH), Centre for Planetary Science and Exploration [London, ON] (CPSX), University of Western Ontario (UWO), 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), Science and Technology Facilities Council (STFC), and Natural Environment Research Council (NERC)

Subjects
Geochemistry & Geophysics, 010504 meteorology & atmospheric sciences, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], 01 natural sciences, stress, strain, Impact crater, DEFORMATION, FLUIDIZATION, Geochemistry and Petrology, impact cratering, CRATER, Earth and Planetary Sciences (miscellaneous), Fluidization, Impact structure, Petrology, 0105 earth and related environmental sciences, Science & Technology, ORIGIN, Scientific drilling, Stress–strain curve, deformation, Drilling, International Ocean Discovery Program, peak ring, Geophysics, Chicxulub, Shear (geology), 13. Climate action, Space and Planetary Science, Physical Sciences, ASYMMETRY, MOON, Geology, HYDROCODE SIMULATIONS
Abstract

Deformation is a ubiquitous process that occurs to rocks during impact cratering; thus, quantifying the deformation of those rocks can provide first-order constraints on the process of impact cratering. Until now, specific quantification of the conditions of stress and strain within models of impact cratering has not been compared to structural observations. This paper describes a methodology to analyze stress and strain within numerical impact models. This method is then used to predict deformation and its cause during peak-ring formation: a complex process that is not fully understood, requiring remarkable transient weakening and causing a significant redistribution of crustal rocks. The presented results are timely due to the recent Joint International Ocean Discovery Program and International Continental Scientific Drilling Program drilling of the peak ring within the Chicxulub crater, permitting direct comparison between the deformation history within numerical models and the structural history of rocks from a peak ring. The modeled results are remarkably consistent with observed deformation within the Chicxulub peak ring, constraining the following: (1) the orientation of rocks relative to their preimpact orientation; (2) total strain, strain rates, and the type of shear during each stage of cratering; and (3) the orientation and magnitude of principal stresses during each stage of cratering. The methodology and analysis used to generate these predictions is general and, therefore, allows numerical impact models to be constrained by structural observations of impact craters and for those models to produce quantitative predictions.Plain Language Summary During impact cratering events, extreme forces act on rocks beneath the crater to produce deformation. Computer simulations of large impact cratering events are particularly important because the conditions of those events can never be simultaneously produced by laboratory experiments. In this study, we describe a method by which the forces and deformations that occur during cratering can be measured in computer simulations of impact cratering events. Combining this analysis with geological observations from impact structures allows us to improve our understanding of impact crater formation. Here, we use this method to study the Chicxulub impact structure, Mexico, to understand the formation of peak rings, rings of hills found internal to the rim of large impact craters. Our analysis provides estimates of the sequence of forces and deformation during peak-ring formation. As deformation produces fractures, our analysis has important implications for how fluids flow through rocks in craters.

Published
2019
Full Text
View/download PDF

6. Quantifying the Release of Climate‐Active Gases by Large Meteorite Impacts With a Case Study of Chicxulub

Author

Artemieva , Natalia, Morgan , Joanna, Gulick , S.P.S., Chenot , E., Christeson , G.L., Claeys , P., Cockell , C.S., Coolen , M.J.L., Ferrière , L., Gebhardt , C., Goto , K., Green , S., Jones , H., Kring , D.A., Lofi , J., Lowery , C.M., Ocampo-Torres , R., Perez-Cruz , L., Pickersgill , A.E., Poelchau , M., Rae , A.S.P., Rasmussen , C., Rebolledo-Vieyra , M., Riller , U., Sato , H., Smit , J., Tikoo , S.M., Tomioka , N., Urrutia-Fucugauchi , J., Whalen , M.T., Wittmann , A., Xiao , L., Yamaguchi , K.E., Zylberman , W., Collins , G.S., Bralower , T.J., Biogéosciences [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 ), Géosciences Montpellier, Université des Antilles et de la Guyane ( UAG ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Institut de chimie et procédés pour l'énergie, l'environnement et la santé ( ICPEES ), 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 ), Centre européen de recherche et d'enseignement de géosciences de l'environnement ( CEREGE ), Centre National de la Recherche Scientifique ( CNRS ) -Institut de Recherche pour le Développement ( IRD ) -Aix Marseille Université ( AMU ) -Collège de France ( CdF ) -Institut National de la Recherche Agronomique ( INRA ) -Institut national des sciences de l'Univers ( INSU - CNRS ), Funding from the International Ocean Discovery Program (IODP), the International Continental scientific Drilling Project (ICDP), NASA grant 15-EXO15_2-0054 and NERC grant NE/P005217/1., Natural Environment Research Council (NERC), The Leverhulme Trust, Biogéosciences [UMR 6282] [Dijon] (BGS), 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, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-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)-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 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), 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), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS), 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), 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), 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), 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), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), and 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)

Subjects
010504 meteorology & atmospheric sciences, Earth science, Potentially hazardous object, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Sediment, [ SDU.STU ] Sciences of the Universe [physics]/Earth Sciences, 010502 geochemistry & geophysics, Atmospheric sciences, 01 natural sciences, Shock (mechanics), Water depth, Geophysics, Meteorite, Volume (thermodynamics), 13. Climate action, Meteorology & Atmospheric Sciences, General Earth and Planetary Sciences, Sedimentary rock, Porosity, Geology, 0105 earth and related environmental sciences
Abstract

9 pages; International audience; Potentially hazardous asteroids and comets have hit Earth throughout its history, with catastrophic consequences in the case of the Chicxulub impact. Here we reexamine one of the mechanisms that allow an impact to have a global effect—the release of climate-active gases from sedimentary rocks. We use the SOVA hydrocode and model ejected materials for a sufficient time after impact to quantify the volume of gases that reach high enough altitudes (> 25 km) to have global consequences. We vary impact angle, sediment thickness and porosity, water depth, and shock pressure for devolatilization and present the results in a dimensionless form so that the released gases can be estimated for any impact into a sedimentary target. Using new constraints on the Chicxulub impact angle and target composition, we estimate that 325 ± 130 Gt of sulfur and 425 ± 160 Gt CO2 were ejected and produced severe changes to the global climate.

Published
2017
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results