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Article Dans Une Revue Journal of Geophysical Research. Planets Année : 2023

The Curiosity Rover’s Exploration of Glen Torridon, Gale crater, Mars: An Overview of the Campaign and Scientific Results

Kristen Bennett
Lauren Edgar
Gregory Wong
Amy Mcadam
Thomas Bristow
Abigail Fraeman
Ashwin Vasavada
Lucy Thompson
Patrick Gasda
Kathryn Stack
Allan Treiman
Jennifer Eigenbrode

Résumé

The Mars Science Laboratory rover, Curiosity, explored the clay mineral-bearing Glen Torridon region for one martian year between January 2019 and January 2021, including a short campaign onto the Greenheugh pediment. The Glen Torridon campaign sought to characterize the geology of the area, seek evidence of habitable environments, and document the onset of a potentially global climatic transition during the Hesperian era. Curiosity roved 5 km in total throughout Glen Torridon, from the Vera Rubin ridge to the northern margin of the Greenheugh pediment. Curiosity acquired samples from 11 drill holes during this campaign and conducted the first martian thermochemolytic-based organics detection experiment with the Sample Analysis at Mars instrument suite. The lowest elevations within Glen Torridon represent a continuation of lacustrine Murray formation deposits, but overlying widespread cross bedded sandstones indicate an interval of more energetic fluvial environments and prompted the definition of a new stratigraphic formation in the Mount Sharp group called the Carolyn Shoemaker formation. Glen Torridon hosts abundant phyllosilicates yet remains compositionally and mineralogically comparable to the rest of the Mount Sharp group. Glen Torridon samples have a great diversity and abundance of sulfurbearing organic molecules, which are consistent with the presence of ancient refractory organic matter. The Glen Torridon region experienced heterogeneous diagenesis, with the most striking alteration occurring just below the Siccar Point unconformity at the Greenheugh pediment. Results from the pediment campaign show that the capping sandstone formed within the Stimson Hesperian aeolian sand sea that experienced seasonal variations in wind direction.
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Dates et versions

hal-03842401 , version 1 (27-12-2022)
hal-03842401 , version 2 (22-06-2023)

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Kristen Bennett, Valerie Fox, Alex Bryk, William Dietrich, Christopher Fedo, et al.. The Curiosity Rover’s Exploration of Glen Torridon, Gale crater, Mars: An Overview of the Campaign and Scientific Results. Journal of Geophysical Research. Planets, 2023, The Curiosity Rover's Investigation of Glen Torridon and the Surrounding Area, 128 (1), pp.e2022JE007185. ⟨10.1029/2022JE007185⟩. ⟨hal-03842401v2⟩
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