Distribution of sulphides and oxidised sulphur components in SNC meteorites

Details Distribution of sulphides and oxidised sulphur components in SNC meteorites Distribution of sulphides and oxidised sulphur components in SNC meteorites

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..93..314b&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 93, no. 3-4, July 1989, p. 314-320. Research supported by SERC.

Computer Science

20

Abundance, Achondrites, Meteoritic Composition, Sulfides, Sulfur Oxides, Sulfates, Sulfur, Meteorites, Snc Meteorites, Distribution, Sulfides, Oxidation, Weathering, Sulfur, Samples, Meteorite, Sulfates, Abundance, Shergottites, Nakhla, Chassigny, Nakhlites, Alha 77005, Alh Meteorites, Origin, Formation, Parent Bodies, Laboratory Studies, Antarctic Meteorites

Scientific paper

Stepped combustion analysis of sulphur-bearing phases in SNC meteorites indicates that sulphates and sulphides are widespread at low abundance in these meteorites. The amount of sulphate sulphur is highest in shergottites: Shergotty (190 ppm) and ALHA 77005 (90 ppm). Nakhla and Chassigny contain lower sulphate sulphur contents (80-85 ppm) compared with shergottites, but their oxidized/reduced sulphur ratios are significantly greater (1.5 or greater) which indicates higher net oxidation states. Nakhla and Chassigny also contain elemental sulphur as an additional oxidized component. An origin of the sulphates (and elemental sulphur) by terrestrial weathering processes cannot be completely rejected, but is considered more likely that the minerals were incorporated into the host rocks as relict grains of weathering or alteration products formed on the surface of SNC parent body.

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