| Abstract: | The isotopic abundances of uranium and the radium activity ratios of eleven samples of uranium ore from the Colorado Plateau have been measured. No significant variation in the isotopic abundance of the uranium was noted; with‘in the experimental error, the average U235/U238 ratio is 137.7. There is a significant variation in the Ra226/Ra223 activity ratios (0.048-0.143), which indicates a relatively recent alteration of the ore samples. The variations do not, however, explain the lead-uranium and lead-lead age discrepancies. ?? 1957. |
| Genre: | Article |
| ProdID: | 70010797 |
| Citation Author: | Senftle, F. E.; Stieff, L.; Cuttitta, F.; Kuroda, P. K. |
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| Citation End Page: | 193 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geochimica et Cosmochimica Acta |
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| Citation Number Of Pages: | 5 |
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| Citation Search Results Text: | Comparison of the isotopic abundance of U235 and U238 and the radium activity ratios in Colorado Plateau uranium ores; 1957; Article; Journal; Geochimica et Cosmochimica Acta; Senftle, F. E.; Stieff, L.; Cuttitta, F.; Kuroda, P. K. |
| Citation Start Page: | 189 |
| Citation Volume: | 11 |
| Citation Year: | 1957 |
| Type: | citation/reference |
| Text: | Comparison of the isotopic abundance of U235 and U238 and the radium activity ratios in Colorado Plateau uranium ores; 1957; Article; Journal; Geochimica et Cosmochimica Acta; Senftle, F. E.; Stieff, L.; Cuttitta, F.; Kuroda, P. K. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1957 00:00 -0600 |
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