Bulk and stable isotopic compositions of carbonate minerals in Martian meteorite ALH 84001: No proof of high formation temperature

Details Bulk and stable isotopic compositions of carbonate minerals in Martian meteorite ALH 84001: No proof of high formation temperature Bulk and stable isotopic compositions of carbonate minerals in Martian meteorite ALH 84001: No proof of high formation temperature

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998m%26ps...33..737t&link_type=abstract

Meteoritics & Planetary Science, vol. 33, no. 4, pp. 737-742.

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Understanding the origin of carbonate minerals in the martian meteorite ALH 84001 is crucial to evaluating the hypothesis that they contain traces of ancient martian life. Using arguments based on chemical equilibria among carbonates and fluids, an origin at >650C (inimical to life) has been proposed. However, the bulk and stable isotope compositions of the carbonate minerals are open to multiple interpretations, and so lend no particular support to a high temperature origin. Determining the formation temperature of the carbonates in ALH 84001 must rely on other (possibly less direct) methods.

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