| Abstract: | Pb concentrations and isotopic compositions have been determined for authigenic overgrowths and detrital cores of K-feldspar from Cambrian sedimentary rocks in Texas, Tennessee, and Pennsylvania (group 1) and southeastern Missouri (group 2). Overgrowths and cores were separated by abrasion and analyzed separately. The disparity in Pb isotopic ratios of group 1 overgrowths and Pb in nearby Mississippi Valley-type deposits implies that the regional authigenic K-feldspar event was not synchronous with ore deposition in the southeastern United States. In contrast, Pb isotopic ratios from group 2 authigenic K-feldspar are similar to ratios in ores of southeastern Missouri, suggesting a genetic relation in late Paleozoic time. -from Authors |
| Genre: | Article |
| ProdID: | 70018304 |
| Citation Author: | Aleinikoff, J. N.; Walter, M.; Kunk, M. J.; Hearn, Jr, P. P. |
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| Citation End Page: | 76 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geology |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Do ages of authigenic K-feldspar date the formation of Mississippi valley-type Pb-Zn deposits, central and southeastern United States?: Pb isotopic evidence; 1993; Article; Journal; Geology; Aleinikoff, J. N.; Walter, M.; Kunk, M. J.; Hearn, Jr, P. P. |
| Citation Start Page: | 73 |
| Citation Volume: | 21 |
| Citation Year: | 1993 |
| Type: | citation/reference |
| Text: | Do ages of authigenic K-feldspar date the formation of Mississippi valley-type Pb-Zn deposits, central and southeastern United States?: Pb isotopic evidence; 1993; Article; Journal; Geology; Aleinikoff, J. N.; Walter, M.; Kunk, M. J.; Hearn, Jr, P. P. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1993 00:00 -0600 |
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