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    Carbonates on Mars
    Cód:
    491_9785510806465
    High Quality Content by WIKIPEDIA articles! Evidence for carbonates on Mars has remained elusive until recently. For example, most remote sensing instruments such as OMEGA and THEMIS that are sensitive to infrared emissivity spectral features of carbonates, had not suggested the presence of carbonate outcrops at 100 m or coarser spatial scales. Though ubiquitous, carbonates dominated by Magnesite (MgCO3) in Martian dust had mass fractions less than 5% and could have formed under current atmospheric conditions. Furthermore, with the exception of the surface dust component, carbonates had not been detected by any in situ mission, even though mineralogic modeling does not preclude small amounts of calcium carbonate in Independence class rocks of Husband Hill in Gusev crater (note: An IAU naming convention within Gusev is not yet established).
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