Sulfur isotope abundances in basic sills, differentiated granites, and meteorites
| Autor: | H. G. Thode, M. Shima, W. H. Gross |
|---|---|
| Rok vydání: | 1963 |
| Předmět: |
Atmospheric Science
Geochemistry Soil Science chemistry.chemical_element Mineralogy Aquatic Science Oceanography Mantle (geology) Sill Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Sulfur content Earth-Surface Processes Water Science and Technology geography geography.geographical_feature_category Ecology Isotope Paleontology Forestry Extrusive Sulfur Igneous rock Geophysics chemistry Meteorite Space and Planetary Science Geology |
| Zdroj: | Journal of Geophysical Research. 68:2835-2847 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/jz068i009p02835 |
| Popis: | Studies were made of the S/sup 32//S/sup 34/ ratios in four large basic sills presumably of deep-seated origin. The average ratio for these sills was determined by weighting each sample according to sulfur content and in accordance with the thickness of rock represented by each sample. These average ratios were within 1.0 per mil of the value for meteoritic sulfur. This is comparable with a spread of about 12.0 per mil for igneous rocks and an over-all spread of about 120.0 per mil for terrestrial samples. In the study of igneous rocks, both intrusive and extrusive, a number of granitic intrusives were found to have S/sup 32//S/sup 34/ ratios completely outside the range of values for all other igneous rocks. The results suggest that these intruded granites are regenerated sediments rather than acidic differentiates that have risen from the subcrust or mantle. (auth) |
| Databáze: | OpenAIRE |
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