Martian volatiles in shergottite EETA 79001 - New evidence from oxidized sulfur and sulfur-rich aluminosilicates

Details Martian volatiles in shergottite EETA 79001 - New evidence from oxidized sulfur and sulfur-rich aluminosilicates Martian volatiles in shergottite EETA 79001 - New evidence from oxidized sulfur and sulfur-rich aluminosilicates

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.1049g&link_type=abstract

(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 16th, Houston,

Mathematics

Logic

27

Achondrites, Aluminum Silicates, Atmospheric Composition, Mars Atmosphere, Meteoritic Composition, Sulfur Oxides, Volatility, Electron Microscopy, Mineralogy, Petrology, Pyrolysis, Meteorites, Stony Meteorites, Achondrites, Samples, Meteorite, Eeta79001, Shergottites, Volatiles, Mars, Oxidation, Sulfur, Aluminosilicates, Enrichment, Laboratory Studies, Lithology, Pyrolysis, Eurcites, Glasses, Eeta79004, Weathering, Composition, Comparisons, Formation, Procedure, Micrscopy, Sem, Spectrometry, Eds, Petrology,

Scientific paper

This report summarizes initial results of a search for mineralogical and petrological clues to the origin of trapped gases in Lith-C. Evidence is presented that, although Antarctic weathering effects in EETA 79001 are more significant than has been previously recognized, it is possible to distinguish terrestrial from preterrestrial alteration effects through study of properly selected control samples. The major conclusion is that Lith-C formed in an atmosphere that was sufficiently oxidizing to form sulfate from sulfide and that at least a small portion of the sulfate probably exists as sulfur-rich, aluminosilicate mineraloids. The additional enrichment of chlorine in one variety of aluminosilicate denotes a possible petrogenetic link with the S- and Cl-rich, fine-grained materials that cover the Martian surface. Therefore, results reported here are consistent with the origin of EETA 79001 as a Martian rock.

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