Experimental formation of carbonates from perchlorate and sulphate brines: Implications for Jezero crater, Mars.

ABSTRACT: Extensive carbonate precipitation has occurred on Mars. To gain insight into the carbonation mechanisms and formation processes under ancient Martian aqueous conditions, we examine the precipitation of carbonates resulting from atmospheric carbon fixation, focusing on interactions between various brines and silicate and perchlorate solutions in alkaline environments. The micro-scale morphology and composition of the resulting precipitates are analysed using ESEM micrographs, EDX chemical compositional analysis, X-ray diffraction, and micro-Raman spectroscopy. Our findings indicate a significant atmospheric carbonation process involving chlorate and sulphate brines reacting with alkaline perchlorate solutions, leading to the precipitation of calcium carbonate polymorphs, including vaterite,

SUBMITTER: Escamilla-Roa E 

PROVIDER: S-EPMC11620553 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature