Communication Dans Un Congrès Année : 2024

SEDIMENTARY EVOLUTION OF THE JEZERO WESTERN FAN, MARS

1 Department of Earth Science and Engineering [Imperial College London]
2 JPL - Jet Propulsion Laboratory
3 LPG - Laboratoire de Planétologie et Géosciences [UMR_C 6112]
4 IRAP - Institut de recherche en astrophysique et planétologie
5 PSI - Planetary Science Institute [Tucson]
6 Department of Earth and Atmospheric Sciences [Atlanta]
7 UF|Geological - Department of Geological Sciences [Gainesville]
8 EPSS - Department of Earth, Planetary and Space Sciences [Los Angeles]
9 Purdue University [West Lafayette]
10 Rice University [Houston]
11 TAMU - Texas A&M University [College Station]
12 SBU - Stony Brook University [SUNY]
13 CU - Cornell University [Ithaca]
14 APL - Johns Hopkins University Applied Physics Laboratory [Laurel, MD]
15 Department of Earth and Planetary Sciences [Knoxville]
16 Planetary Geosciences Institute [Knoxville]
17 LGL-TPE - Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement
18 SESE - School of Earth and Space Exploration [Tempe]
19 Joanneum Research Forschungsgesellschaft mbH
20 Caltech Division of Geological and Planetary Sciences
21 EAPS - Department of Earth, Atmospheric and Planetary Sciences [MIT, Cambridge]
22 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie
23 UCPH - Københavns Universitet = University of Copenhagen = Université de Copenhague
24 BGC - Berkeley Geochronology Center
25 JSC - NASA Johnson Space Center
26 LANL - Los Alamos National Laboratory
27 CALTECH - California Institute of Technology
Kathryn M. Stack
Libby R. W. Ives
  • Fonction : Auteur
  • PersonId : 1308380
Joel A. Hurowitz
  • Fonction : Auteur
  • PersonId : 1308361
Christian Tate
Justin Maki
Rachel Kronyak
Vivian Z Sun
David L. Shuster
Justin I Simon

Résumé

Sedimentary fans developed at the mouths of Martian valleys have been interpreted as the deposits of sustained surface water flow on early Mars building either fluvial fan systems or deltas into standing bodies of water [1]. Whilst much insight has been gleaned from orbital observations, it is only possible to constrain the character, relative timing and persistence of ancient aqueous activity on Mars through detailed on-the-ground interrogation of sedimentary successions built during fan growth. A prominent sedimentary fan deposit at the western margin of Jezero crater – the Western fan – has been interpreted from orbital data/observations to be a river delta that prograded into an ancient lake basin during the Late Noachian-Early Hesperian epochs on Mars (~3.6-3.8 Ga) [2]. The Western fan deposit forms a point-sourced depositional system developed at the mouth of Neretva Vallis, a valley system that is incised across the crater rim and has an extensive extra-crater catchment draining over diverse ancient geological units in Nili Planum [4]. The mechanism of crater rim breaching remains unconstrained. Between 2022 and 2023, the Mars 2020 Perseverance rover explored the Western fan, with the objective of characterizing its paleoenvironmental context and collecting a diverse suite of sedimentary rock samples for return to Earth via the Mars Sample Return mission. Perseverance has now completed her traverse across the Western fan having commenced in the distal downstream sectors exposed at the erosional front of the fan and then crossing across its upper exposed surface toward the fan apex region near the mouth of Neretva Vallis. This transect provides a unique window into a Martian sediment routing system at a time when climate conditions permitted the flow of surface water. In this contribution, we review the overall sedimentary architecture of the fan and develop a model for its evolution based on detailed mapping of lithofacies changes across the fan. A first-order synoptic overview is presented.

Fichier principal
Vignette du fichier
3370.pdf (122.12 Ko) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-04650004 , version 1 (16-07-2024)

Licence

Identifiants

  • HAL Id : hal-04650004 , version 1

Citer

Sanjeev Gupta, Kathryn M. Stack, Nicolas Mangold, Libby R. W. Ives, Samantha J Gwizd, et al.. SEDIMENTARY EVOLUTION OF THE JEZERO WESTERN FAN, MARS. Tenth International Conference on Mars 2024, Lunar and Planetary Institute, Jul 2024, Pasadena (California), United States. pp.3370. ⟨hal-04650004⟩
413 Consultations
368 Téléchargements

Partager

  • More