Communication Dans Un Congrès Année : 2025

Prow & co.: inside the fluvial lenses of Gale's layered sulfate unit

Juergen Schieber
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Edwin S. Kite
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Nina L Lanza
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Abigail Fraeman
Ashwin R. Vasavada

Résumé

For three years, the Curiosity rover has been exploring the layered sulfate unit (LSu) of Gale crater, Mars. Not only interesting as a potential record of a monotonic environmental shift towards arid conditions at the Noachian-Hesperian transition, we now know that this interval evidences complex environmental parameters which are characterized by alternating wetter and drier conditions at various timescales [1-3]. Such changes in depositional setting are particularly apparent within the Contigo mbr. of the Mirador fm. There, the LSu strata is dominated by stacked, large-scale cross-stratified aeolian sandstones, tens of meters in thickness, that are punctuated by erosion-resistant, decameter-wide, darker-toned and mostly lens-shaped sandstone bodies that suggest a fluvial deposition [4]. Using image data acquired with Mastcam and ChemCam’s RMI, we detail a wealth of sedimentary structures distributed across these lenses, focusing at the Prow outcrop and neighboring buttes (Fig. 1). We also provide a first assessment of the chemical compositions seen by ChemCam’s LIBS at the Prow.
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Dates et versions

hal-04929261 , version 1 (04-02-2025)

Identifiants

  • HAL Id : hal-04929261 , version 1

Citer

Gwénaël Caravaca, Sanjeev Gupta, William Rapin, Juergen Schieber, Laetitia Le Deit, et al.. Prow & co.: inside the fluvial lenses of Gale's layered sulfate unit. 56th Lunar and Planetary Science Conference, Lunar and Planetary Institute, Mar 2025, The Woodlands (Texas), United States. pp.1389. ⟨hal-04929261⟩
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