Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer

Details Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sci...306.1740k&link_type=abstract

Science, Volume 306, Issue 5702, pp. 1740-1745 (2004).

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280

Scientific paper

Mössbauer spectra measured by the Opportunity rover revealed four mineralogical components in Meridiani Planum at Eagle crater: jarosite- and hematite-rich outcrop, hematite-rich soil, olivine-bearing basaltic soil, and a pyroxene-bearing basaltic rock (Bounce rock). Spherules, interpreted to be concretions, are hematite-rich and dispersed throughout the outcrop. Hematitic soils both within and outside Eagle crater are dominated by spherules and their fragments. Olivine-bearing basaltic soil is present throughout the region. Bounce rock is probably an impact erratic. Because jarosite is a hydroxide sulfate mineral, its presence at Meridiani Planum is mineralogical evidence for aqueous processes on Mars, probably under acid-sulfate conditions.

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