Jarosite in a Pleistocene East African saline-alkaline paleolacustrine deposit: Implications for Mars aqueous geochemistry
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منابع مشابه
Jarosite in a Pleistocene East African saline‐alkaline paleolacustrine deposit: Implications for Mars aqueous geochemistry
[1] Jarosite occurs within altered tephra from the saline‐alkaline paleolake deposits of Pliocene‐Pleistocene Olduvai Gorge, Tanzania. Zeolites (mainly phillipsite), authigenic K‐feldspar, and Mg/Fe‐smectites dominate the mineral assemblage, indicating saline‐ alkaline diagenetic conditions (pH > 9). As jarosite is ordinarily an indicator of acidic conditions on Earth and Mars, its association ...
متن کاملJarosite in an East African Saline-alkaline Paleolake Deposit: Implications
FOR MARS. L. J. McHenry, V. F. Chevrier, and C. Schröder, Department of Geosciences, University of WisconsinMilwaukee, PO Box 413, Milwaukee, WI 53201, [email protected], W.M. Keck Laboratory for Space and Planetary Simulation, Arkansas Center for Space and Planetary Science, MUSE 202, University of Arkansas, Fayetteville, AR 72701, Institut für Anorganische Chemie und Analytische Chemie, Johann...
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Jarosite, a potassium (sodium) iron sulphate hydrated mineral, has recently been identified on the martian surface by the Opportunity rover. Using recent thermochemical data [Drouet and Navrotsky, 2003, Geochim. Cosmochim. Acta 67, 2063–2076; Forray et al., 2005, Geochim. Cosmochim. Acta, in press], we calculate the equilibrium decomposition curve of jarosite and show that it is thermodynamical...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2011
ISSN: 0148-0227
DOI: 10.1029/2010je003680