| Title: |
Sedimentary architecture of the delta front at Jezero crater, Mars |
| Authors: |
Mangold, Nicolas; Gupta, Sanjeev; Caravaca, Gwénaël; Dromart, Gilles; Gasnault, Olivier; Le Mouélic, Stéphane; Quantin-Nataf, Cathy; Horgan, Briony; Bell, Jim F.; Beyssac, Olivier; Maurice, Sylvestre; Núñez, Jorge; Shuster, David L.; Stack‐Morgan, Katie, M.; Weiss, Benjamin P.; Wiens, Roger, C |
| Contributors: |
Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG); Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST); Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ); Department of Earth Science and Engineering Imperial College London; Imperial College London; Institut de recherche en astrophysique et planétologie (IRAP); Université Toulouse III - Paul Sabatier (UT3); Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE); École normale supérieure de Lyon (ENS de Lyon); Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL); 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); Purdue University West Lafayette; Arizona State University Tempe (ASU); Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC); Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement IRD : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Johns Hopkins University Applied Physics Laboratory Laurel, MD (APL); Berkeley Geochronology Center (BGC); Jet Propulsion Laboratory (JPL); NASA-California Institute of Technology (CALTECH); Department of Earth, Atmospheric and Planetary Sciences MIT, Cambridge (EAPS); Massachusetts Institute of Technology (MIT) |
| Source: |
International Conference on Fluvial Sedimentology 2023 ; https://hal.science/hal-04052771 ; International Conference on Fluvial Sedimentology 2023, Jul 2023, Riva Del Garda, Italy ; https://www.icfs2023.it/ |
| Publisher Information: |
CCSD |
| Publication Year: |
2023 |
| Collection: |
Université Toulouse III - Paul Sabatier: HAL-UPS |
| Subject Terms: |
Mars; mars2020; jezero crater; Perseverance; delta; delta front; sedimentology sedimentary architecture; [SDU]Sciences of the Universe [physics]; [SDU.STU]Sciences of the Universe [physics]/Earth Sciences; [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology; [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy |
| Subject Geographic: |
Riva Del Garda; Italy |
| Description: |
International audience ; The Perseverance rover landed on the floor of Jezero crater in February 2021, a site selected thanks to the presence of fluvial valleys, sedimentary fans and astrobiologically-relevant minerals (phyllosilicates, carbonates). Images obtained along the rover traverse by the Mastcam-Z camera and the SuperCam instrument provide in-situ observations of scarps along the western fan and the residual butte Kodiak. These images display a variety of facies consistent with a deltaic architecture: Close to the base of scarps of the butte Kodiak, subhorizontal, fine-grained layers are interpreted as bottomsets transitioning progressively into steeply inclined (up to 35°) planar beds interpreted as foresets. Above foresets, sandstones and pebbly sandstones display cross-bedding and local channelization as observed in fluvial deposits, interpreted as topsets on the deltaic plain. The transition from foresets to topsets display varying elevations (from -2510 to -2580 m below datum) suggestive of fluctuating lake levels in a closed lake system. Boulder-rich conglomerates are observed toward the top of scarps. They display a clast-supported texture with imbricated, rounded cobbles and ~1 m thick beds with fining upward sequence consistent with accretion of fluvial bars from high-energy floods of still undetermined origin (e.g., glacial dam break, rapid snowmelt). The persistence of a lake during these flood events is currently unknown. The overall architecture and presence of flood deposits suggest a building of the fan in relatively short period at geological scale in agreement with estimations made in the past (hundreds to thousands of years). |
| Document Type: |
conference object |
| Language: |
English |
| Availability: |
https://hal.science/hal-04052771 |
| Accession Number: |
edsbas.9E281B2B |
| Database: |
BASE |