Hydrated Minerals Associated with Interior Layered Deposits near the Southern Wall of Melas Chasma, Valles Marineris, Mars

Details Hydrated Minerals Associated with Interior Layered Deposits near the Southern Wall of Melas Chasma, Valles Marineris, Mars Hydrated Minerals Associated with Interior Layered Deposits near the Southern Wall of Melas Chasma, Valles Marineris, Mars

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p23b1711l&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P23B-1711

Physics

[5410] Planetary Sciences: Solid Surface Planets / Composition, [5415] Planetary Sciences: Solid Surface Planets / Erosion And Weathering, [5464] Planetary Sciences: Solid Surface Planets / Remote Sensing, [6225] Planetary Sciences: Solar System Objects / Mars

Scientific paper

MRO CRISM full resolution targeted mode hyperspectral image data (FRT00013F5B) centered at 10.22 S, 74.46 W over a portion of the southern wall and nearby floor of Melas Chasma show a sequence of interior layered deposits with distinct mineral associations. This study area is located to the southeast of the region analyzed by Roach et al. (2010, Icarus, 206, 253-268). The topography associated the deposits was examined using standard product elevation maps derived from HRSC data and used along with superposition relationships to help define the stratigraphic order. The bottom of the exposed section consists of repeating interbedded monohydrated and polyhydrated sulfate-bearing layers. Jarosite-bearing layers are found above this sequence, along with layers that have a 2.3 micrometer absorption tentatively identified as due to Fe/Mg smectite-bearing material. The top of the section is dominated by an areally extensive polyhydrated sulfate-bearing unit. Detailed results will be presented along with an analysis of the changing aqueous conditions inferred from the mineral associations.

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