دورية أكاديمية
Deposition and erosion of a Light-Toned Yardang-forming unit of Mt Sharp, Gale crater, Mars
| العنوان: | Deposition and erosion of a Light-Toned Yardang-forming unit of Mt Sharp, Gale crater, Mars |
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| المؤلفون: | Dromart, G., Le Deit, Laetitia, Rapin, W., Gasnault, O., Le Mouélic, S., Quantin-Nataf, C., Mangold, N., Rubin, D., Lasue, J., Maurice, S., Newsom, H. E., Pinet, Patrick, C., Scuderi, L., Wiens, R. C. |
| المساهمون: | Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), California Institute of Technology (CALTECH), Institut de recherche en astrophysique et planétologie (IRAP), 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), 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)-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), Department of Earth and Planetary Sciences Santa Cruz, University of California Santa Cruz (UC Santa Cruz), University of California (UC)-University of California (UC), The University of New Mexico Albuquerque, Los Alamos National Laboratory (LANL) |
| المصدر: | ISSN: 0012-821X ; Earth and Planetary Science Letters ; https://hal.science/hal-03091803Test ; Earth and Planetary Science Letters, 2021, 554, pp.116681. ⟨10.1016/j.epsl.2020.116681⟩. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2021 |
| المجموعة: | Université Toulouse III - Paul Sabatier: HAL-UPS |
| مصطلحات موضوعية: | Yardang, Stratigraphy, Eolian, ChemCam, Mars Climate, Gale Crater, [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy |
| الوصف: | International audience ; Gale crater is a large impact crater with a ca 5 km thick sequence of stratified rocks in it, expressed today as a central eroded mound (i.e., Aeolis Mons informally named Mt. Sharp). A goal of the current Mars Science Laboratory mission in Gale crater is to investigate the processes that deposited, lithified, and eroded this fill. The Light-Toned Yardang Unit (LTYu) unit, the subject of the present research, is one of the geological units of Mt Sharp. Our specific purpose here is to refine and interpret the imaging documentation of the morphologic and stratal components of the LTYu, at large outcrop scale. In combination with established orbital images, we use the Remote Micro-Imager (RMI) of ChemCam, a remote sensing instrument currently operated onboard Curiosity rover, which provides several types of context imaging. RMI capabilities now include “Long Distance” acquisitions of targets several kilometers away. In these new acquisitions, substantial differences are visible in LTYu yardang attitudes from lowest to uppermost elevations allowing tentative subdivision of the LTYu into subunits. Bedding geometries in the lower LTYu are consistent with eolian dune foresets which collectively prograde towards an average N134° direction. Based on stratal architectures, the LTYu is viewed as an amalgamated stack of at least two, and possibly four, ancient erg systems bounded by large deflationary “supersurfaces”. Observations point to a multistory generation of yardangs interpreted to have been successively buried during the stratigraphic building of Mt Sharp. We conclude that the successive sequences of eolian deposition-erosion recorded by the LTYu have been generated by cyclic changes from semi-arid to arid conditions, coupled in climatic cycles, including wind regime change. The regional unconformity that tops the Lower mound formation of Mt Sharp, and the subsequent emplacement of the LTYu, collectively express a clear tendency toward sustained arid environments for this region of Mars ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | hal-03091803; https://hal.science/hal-03091803Test; https://hal.science/hal-03091803/documentTest; https://hal.science/hal-03091803/file/Dromart_et_al_yardangs_R2_light.pdfTest |
| DOI: | 10.1016/j.epsl.2020.116681 |
| الإتاحة: | https://doi.org/10.1016/j.epsl.2020.116681Test https://hal.science/hal-03091803Test https://hal.science/hal-03091803/documentTest https://hal.science/hal-03091803/file/Dromart_et_al_yardangs_R2_light.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.A77E153E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.epsl.2020.116681 |
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