A New Constraint on the Physicochemical Condition of Mars Surface during the Amazonian Epoch Based on Chemical Speciation for Secondary Minerals in Martian Nakhlites
نویسندگان
چکیده
Iddingsite in Martian nakhlites contains various secondary minerals that reflect water–rock interaction on Mars. However, the formation processes of Fe iddingsite are unclear because they include carbonates precipitated under reductive and alkaline conditions sulfates generally oxidative acidic conditions. Mineral types cannot coexist equilibrium. Herein, we characterize carbonate phase meteorite Yamato 000593 as siderite Mn-bearing via field-emission electron probe microanalyzer (FE-EPMA). Then, examined distribution speciation trace Cr S within through synchrotron micro-focused X-ray fluorescence-X-ray absorption fine structure scanning transmission microscopy (μ-XRF-XAFS/STXM) analysis to estimate transition history Eh-pH during explain coexistence sulfate phases nakhlite vein. Specifically, mesostasis heterogeneous Mn-FeCO3 incorporating Cr(III) constrain condition. The fluid chemistry determined herein based elements provide a new constraint physicochemical condition water altered body Amazonian epoch.
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ژورنال
عنوان ژورنال: Minerals
سال: 2021
ISSN: ['2075-163X']
DOI: https://doi.org/10.3390/min11050514