 | | Journal (article/letter/editorial) | | Deposits,Ely, Nevada L^UI•F.NCV.P. J^•Es Abstract The porphyry copperdepositsnear Ely, Nevada, occur within...this zone show a crude metal zoning pattern. Biotite-orthoclasealteration in porphyry grades upward...origin(Nielsen, 488 PORPHYRYCOPPERDEPOSITS,ELY, NEVADA 489 Present Work available. Sedimentaryunitsare...for miles beyondthe ore deField work in the Robinson district was carried posit and its alteration aureole...aid in explorationfor madethroughall areasof the district, but the major concealeddeposits. effort consistedof |  | | Report (issue) | | Gold in the Bingham District, Utah By EDWIN W. TOOKER Gold in the Butte District, Montana By EDWIN W...TOOKER Gold in the Ely (Robinson) Copper District, White Pine County, Nevada By LAURENCE P.JAMES The...Tomboy-Minnie Gold Deposits at Copper Canyon, Lander County, Nevada By TED G. THEODORE, STEPHEN S. HOWE, and DAVID...Gold in the Bingham District, Utah / by Edwin W. looker Gold in the Butte District, Montana / by Edwin...looker Gold in the Ely (Robinson) Copper District, White Pine County, Nevada / by Laurence P. James The |  | | Journal (article/letter/editorial) | | silicatealterationassemblages. A centralzoneof biotite-orthoclase alterationis surrounded by a partial...highestcopper contentnormallyoccurswithinthe biotite-orthoclase zoneor at its outerborderswith quartz-sericite...ratiosin the orthoclase field,therebyformingthe biotite-orthoclase alteration. In orderto form the str...workers undoubtedly recognize this problem (Meyer district-scale view of their characteristics. In addibetween... interlayeredwith montmorillonite.Chloriteand biotite vary in A1/Si, and in Mg/Fe, as well as other probable |  | | Book | | Editors. SPENCER . . R. TirLey has worked as a mining geologist in the western United States in both...where no maps were available. In southern Yuma County he even discovered and named a whole new range...specific mention are the mapping in southern Yuma County, studies on gold lode and placer deposits, work...Range Province, and work on a number of individual mining districts and on numerous mineral commodities....establish Tucson, Arizona, as the hub of the copper mining industry of the United States. In fact, an inscribed |  | | Book | | derfoot0000ornd GEOLOGY UNDERFOOT IN CENTRAL NEVADA Richard L. Orndorff ~ Robert W. Wieder Harry...Official Highway Map of Nevada (Nevada State Department of Transportation) and from Nevada Atlas and Gazetteer...Orndorff, Richard L. Geology underfoot in central Nevada / Richard L. Orndorff, Robert W. Wieder, Harry...0-87842-418-0 (alk. paper) 1. Geology—Nevada—Guidebooks. 2. Nevada—Guidebooks. I. Wieder, Robert W., 1958—...miner’ cabin sits next to U.S. 50 near Eureka, Nevada. —Dave Futey photo Winnemucca 12,3 3 0 50 |
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