Sedimentological and Geochemical Perspectives on a Marginal Lake Environment Recorded in the Hartmann's Valley and Karasburg Members of the Murray Formation, Gale Crater, Mars
نویسندگان
چکیده
This study utilizes instruments from the Curiosity rover payload to develop an integrated paleoenvironmental and compositional reconstruction for 65-m thick interval of stratigraphy comprising Hartmann's Valley Karasburg members Murray formation, Gale crater, Mars. The consists cross-stratified sandstone (Facies 1), planar-laminated 2), mudstone 3). Facies 1 is composed showing truncated sets concave-curvilinear laminae stacked into cosets. Sets are estimated be meter-to sub-meter-scale, consistent with low-height dunes. Thin stratigraphic intervals stacking patterns 2 3 support a wet aeolian dune interpretation. Meter-thick packages 2) interpreted represent interfingering dune-interdune strata. meter-thick lacustrine deposition persistent standing water. Integration geochemistry each facies reveals some control based on depositional process. Models source rock composition Alpha Particle X-Ray Spectrometer measurements show that derived basaltic source. Alteration indices geochemical trends provide evidence moderate chemical weathering occurred before changes due diagenesis. Differences in wt% FeO(T) TiO2 between minimal, though point sediment sorting transport. Comparisons terrestrial sedimentary systems indicate reflect environment where diverse subaqueous subaerial persisted adjacent long-lived body
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ژورنال
عنوان ژورنال: Journal Of Geophysical Research: Planets
سال: 2022
ISSN: ['2169-9100', '2169-9097']
DOI: https://doi.org/10.1029/2022je007280