| Abstract: | Majuba Hill is the erosional remnant of a mineralized volcanic complex of rhyolite porphyry stocks, dikes, sills and irregular masses of breccia intruded into Triassic(? ) argillites. Majuba Hill is best known for its Cu and Sn ore; in addition, it was mineralized with other metals of possible economic significance, most notably, Mo, Ag, and U. Although this is an intrusive complex with no evidence of any extrusive phases, it was intruded sufficiently near the surface to develop a porphyritic texture. Intense sericitic and argillic alteration affected all stages of intrusion. Fresh rocks were not available for K-Ar analyses. Several samples of feldspars and sericite from altered zones yielded K-Ar ages for the alteration of 24. 7 to 25. 5 m. y. The tight clustering of ages suggests that all stages of the complex were altered within less than 1 m. y. |
| Genre: | Article |
| ProdID: | 70013908 |
| Citation Author: | Wenrich, Karen, J.; Mascarenas, Joseph, F.; Silberman, Miles, L. |
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| Citation End Page: | 233 |
| Citation Issue: | 1-2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geochemical Exploration |
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| Citation Number Of Pages: | 2 |
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| Citation Search Results Text: | GEOCHEMISTRY OF MAJUBA HILL, NEVADA.; 1984; Article; Journal; Journal of Geochemical Exploration; Wenrich, Karen, J.; Mascarenas, Joseph, F.; Silberman, Miles, L. |
| Citation Start Page: | 232 |
| Citation Volume: | 25 |
| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | GEOCHEMISTRY OF MAJUBA HILL, NEVADA.; 1984; Article; Journal; Journal of Geochemical Exploration; Wenrich, Karen, J.; Mascarenas, Joseph, F.; Silberman, Miles, L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1984 00:00 -0600 |
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