| Abstract: | The Copley Greenstone, Balaklala Rhyolite, and Mule Mountain stock in the West Shasta Cu-Zn district, California, have Rb-Sr, Sm-Nd, U-Pb, and K-Ar systematics that indicate they are a cogenetic suite of ensimatic island-arc rocks about 400 Ma. Pervasive alteration and mineralization of these rocks, for the most part, was syngenetic and the major component of the mineralizing fluid was Devonian seawater. K-Ar ages of quarz-sericite concentrates from ore horizons and Rb-Sr systematics of a few rock and ore specimens record a later thermal and mineralizing event in the district of about 260 Ma. Contamination of some rocks with pelagic sediments is indicated by the Sm-Nd data. -Authors |
| Genre: | Article |
| ProdID: | 70013049 |
| Citation Author: | Kistler, R. W.; McKee, E. H.; Futa, K.; Peterman, Z. E.; Zartman, R. E. |
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| Citation End Page: | 2135 |
| Citation Issue: | 8 |
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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: | A reconnaissance Rb-Sr, Sm-Nd, U-Pb, and K-Ar study of some host rocks and ore minerals in the West Shasta Cu- Zn district, California ( USA).; 1985; Article; Journal; Economic Geology; Kistler, R. W.; McKee, E. H.; Futa, K.; Peterman, Z. E.; Zartman, R. E. |
| Citation Start Page: | 2128 |
| Citation Volume: | 80 |
| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | A reconnaissance Rb-Sr, Sm-Nd, U-Pb, and K-Ar study of some host rocks and ore minerals in the West Shasta Cu- Zn district, California ( USA).; 1985; Article; Journal; Economic Geology; Kistler, R. W.; McKee, E. H.; Futa, K.; Peterman, Z. E.; Zartman, R. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1985 00:00 -0600 |
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