| Abstract: | A U/Pb isochron age of 27.5 + or - 0.5 m.y. is determined for the Golden Fleece vein, an age which is identical with the age of the quartz latite lavas that the vein cuts. Within the Lake City area, only the Golden Fleece vein contains pitchblende and Au-Ag tellurides and has Pb isotope ratios that together define it as unique within the area. The 27.5 m.y. age relates this vein to the waning stages of the Uncompahgre caldera (27-29) rather than to the Lake City caldera (23.1 m.y.). -G.J.N. |
| Genre: | Article |
| ProdID: | 70012965 |
| Citation Author: | Hon, K.; Ludwig, K. R.; Simmons, K. R.; Slack, J. F.; Grauch, R. I. |
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| Citation End Page: | 417 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Economic Geology |
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| Citation Number Of Pages: | 8 |
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| Citation Search Results Text: | U-Pb isochron age and Pb isotope systematics of the Golden Fleece vein - implications for the relationship of mineralization to the Lake City caldera, western San Juan Mountains, Colorado.; 1985; Article; Journal; Economic Geology; Hon, K.; Ludwig, K. R.; Simmons, K. R.; Slack, J. F.; Grauch, R. I. |
| Citation Start Page: | 410 |
| Citation Volume: | 80 |
| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | U-Pb isochron age and Pb isotope systematics of the Golden Fleece vein - implications for the relationship of mineralization to the Lake City caldera, western San Juan Mountains, Colorado.; 1985; Article; Journal; Economic Geology; Hon, K.; Ludwig, K. R.; Simmons, K. R.; Slack, J. F.; Grauch, R. I. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1985 00:00 -0600 |
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