| Abstract: | Three samples (metamorphic country rock, Idaho batholith granite, and auriferous quartz vein) were dated by the 40Ar/39Ar age spectrum technique. The lode deposits are Cretaceous (71 m.y.); their cooling histories and depths of emplacement, inferred from the age spectra, are evidence for the granite plutons and the lode deposits having been emplaced at the same 40-9 km depth and being genetically related. Thus, the Idaho batholith is not barren, and at least two precious-metal mineralizing events, Cretaceous and Eocene in age, occur in central Idaho. Class differences between the two ages of deposits, of style, alteration and mineralogy, are suggested. -G.J.N. |
| Genre: | Article |
| ProdID: | 70014521 |
| Citation Author: | Lund, K.; Snee, L. W.; Evans, K. V. |
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| Citation End Page: | 996 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Economic Geology |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | Age and genesis of precious metals deposits, Buffalo Hump district, central Idaho: implications for depth of emplacement of quartz veins.; 1986; Article; Journal; Economic Geology; Lund, K.; Snee, L. W.; Evans, K. V. |
| Citation Start Page: | 990 |
| Citation Volume: | 81 |
| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Age and genesis of precious metals deposits, Buffalo Hump district, central Idaho: implications for depth of emplacement of quartz veins.; 1986; Article; Journal; Economic Geology; Lund, K.; Snee, L. W.; Evans, K. V. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1986 00:00 -0600 |
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