| Abstract: | The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, 1.2; Sr, 120; Th, 0.2; and U, 0.1. The ratio Sr87 to Sr86 is about 0.702, that of K to U is 1.4 ?? 104, and of Th to U is 1.8. These amounts of K, Th, U, and radiogenic Sr87 are less than in other common igneous rocks. The ratios of Th to U and Sr87 to Sr 86 suggest that the source region of the oceanic tholeiites was differentiated from the original mantle material some time in the geologic past. |
| Genre: | Article |
| ProdID: | 70010445 |
| Citation Author: | Tatsumoto, M.; Hedge, C. E.; Engel, A. E. J. |
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| Citation End Page: | 888 |
| Citation Issue: | 3698 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 3 |
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| Citation Search Results Text: | Potassium, rubidium, strontium, thorium, uranium, and the ratio of strontium-87 to strontium-86 in oceanic tholeiitic basalt; 1965; Article; Journal; Science; Tatsumoto, M.; Hedge, C. E.; Engel, A. E. J. |
| Citation Start Page: | 886 |
| Citation Volume: | 150 |
| Citation Year: | 1965 |
| Type: | citation/reference |
| Text: | Potassium, rubidium, strontium, thorium, uranium, and the ratio of strontium-87 to strontium-86 in oceanic tholeiitic basalt; 1965; Article; Journal; Science; Tatsumoto, M.; Hedge, C. E.; Engel, A. E. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1965 00:00 -0600 |
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