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Jarosite stability on Mars

Navrotsky, Alexandra and Forray, Ferenc Lázár and Drouet, Christophe Jarosite stability on Mars. (2005) Icarus, vol. 1 (n° 1). pp. 250-253. ISSN 0019-1035

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Official URL: http://dx.doi.org/10.1016/j.icarus.2005.02.003

Abstract

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 thermodynamically stable under most present martian pressures and temperatures. Its stability makes jarosite potentially useful to retain textural, chemical, and isotopic evidence of past history, including possible biological activity, on Mars.

Item Type:Article
Additional Information:http://www.sciencedirect.com/science/journal/00191035
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > University of California - UC Davis (USA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Thomas Bonnecarere
Deposited On:06 May 2008 11:31

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