Computer Science
Scientific paper
Jun 1954
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1954gecoa...5..286t&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 5, Issue 6, pp.286-298
Computer Science
9
Scientific paper
Sulphur and carbon isotope abundance studies have been made on the sulphur well cores and adjacent formations of the Texas and Louisiana salt domes. The free sulphur was found to be depleted in S 34 with respect to associated sulphate by 3.9 per cent on the average. This compares to a 3.2 per cent fractionation of the sulphur isotopes in the formation of free sulphur from sulphate by bacterial action in North African lakes. Also, the associated sulphate was found to be enriched in S 34 as compared to adjacent anhydrite formations to various extents depending on the sulphur well investigated. Carbon isotope ratios obtained for the calcite matrix of the sulphur well cores showed that the carbon of the calcite was depleted by from 3.3 to 5.5 per cent in C 13 as compared to standard limestone. These results indicate that the calcite was formed simultaneously with the free sulphur from carbon of organic origin by a process resulting in some further fractionation of the carbon isotopes. All the isotope abundance data can be reconciled with the conclusion that the large sulphur deposits of the southwestern United States have been formed by living organisms.
Thode H. G.
Wallouch R.
Wanless R. K.
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