Jarosite stability on Mars

Alexandra Navrotsky; Ferenc Lázár Forray; Christophe Drouet

doi:10.1016/j.icarus.2005.02.003

Jarosite stability on Mars

Alexandra Navrotsky, Ferenc Lázár Forray, Christophe Drouet

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

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.

Original language	English (US)
Pages (from-to)	250-253
Number of pages	4
Journal	Icarus
Volume	176
Issue number	1
DOIs	https://doi.org/10.1016/j.icarus.2005.02.003
State	Published - Jul 2005
Externally published	Yes

Keywords

Jarosite
Mars climate
Mineral stability
Mineralogy

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1016/j.icarus.2005.02.003

Cite this

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title = "Jarosite stability on Mars",

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.",

keywords = "Jarosite, Mars climate, Mineral stability, Mineralogy",

author = "Alexandra Navrotsky and Forray, {Ferenc L{\'a}z{\'a}r} and Christophe Drouet",

note = "Funding Information: This work was supported by the U.S. Department of Energy Grant DEFG0397SF14749. We thank to S. McLennan and anonymous reviewers for their helpful comments and suggestions, which improve the quality of this paper. ",

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doi = "10.1016/j.icarus.2005.02.003",

language = "English (US)",

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pages = "250--253",

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T1 - Jarosite stability on Mars

AU - Navrotsky, Alexandra

AU - Forray, Ferenc Lázár

AU - Drouet, Christophe

N1 - Funding Information: This work was supported by the U.S. Department of Energy Grant DEFG0397SF14749. We thank to S. McLennan and anonymous reviewers for their helpful comments and suggestions, which improve the quality of this paper.

PY - 2005/7

Y1 - 2005/7

N2 - 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.

AB - 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.

KW - Jarosite

KW - Mars climate

KW - Mineral stability

KW - Mineralogy

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Jarosite stability on Mars

Abstract

Keywords

ASJC Scopus subject areas

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