Geochemistry of Diagenetic Fluids and Sedimentary Protolith of Gale Crater

Niles, P B

关键词: GEOCHEMISTRY;    SEDIMENTS;    CRATERS;    DEPOSITION;    ICE;    DUST;    IN SITU RESOURCE UTILIZATION;    WEATHERING;   

RP-ID  :  JSC-E-DAA-TN66437

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来源: NASA Technical Reports Server

【 摘 要 】

The geochemical composition of the sediments of Gale crater can be modeled using two component mixing between a weathered basalt and a sulfate rich endmember. This suggests that the amount of in-situ weathering occurring after deposition was minimal, and most of the variation in weathering indi-ces can be explained simply through addition of Ca-sulfate minerals during diagenesis. Evidence for burial of Gale sediments can be explained through the pres-ence of large ice/dust deposits.