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Iron-sulfur mineralogy of Mars - Magmatic evolution and chemical weathering productsModels are developed for the magmatic evolution and the oxidative weathering of sulfide minerals on Mars, based on petrogenetic associations among komatiitic rock types, Viking geochemical data, SNC meteorites, and terrestrial Fi-Ni deposits. The weathering model was tested by exposing komatiitic pyrrhotites and olivines to sulfuric acid solutions, with or without dissolved ferric iron, and identifying the reaction products by Moessbauer spectroscopy. The results suggest that, on Mars, acidic groundwater has induced oxidative weathering of pyrrhotite, yielding FeS2 and then FeOOH.
Document ID
19900061719
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Burns, Roger G.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Fisher, Duncan S.
(MIT Cambridge, MA, United States)
Date Acquired
August 14, 2013
Publication Date
August 30, 1990
Publication Information
Publication: Journal of Geophysical Research
Volume: 95
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
90A48774
Funding Number(s)
CONTRACT_GRANT: NAGW-1078
CONTRACT_GRANT: NAGW-2073
CONTRACT_GRANT: NSG-7604
Distribution Limits
Public
Copyright
Other

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