| Lat / long: | 39.2498, -115.55688 |
| Primary: | Molybdenum, Tungsten, Silver, Gold, Copper |
| Secondary: | Lead, Zinc |
| Tertiary: | Tellurium, Bismuth, Arsenic, Antimony |
| Ore: | Scheelite, Molybdenite, Chalcopyrite, Gold, Pyrite, Arsenopyrite |
| Gangue: | Quartz, Garnet, Pyroxene, Tremolite |
| Orebody form: | irregular |
| Operation type: | Surface |
| Deposit type: | Poly-metallic skarn |
| Production size: | Small |
| Development status: | Producer |
| Host rock: | Secret Canyon Shale, Dunderberg Shale |
| Host type: | Limestone,Shale |
| Associated rock: | Seligman Stock |
| Associated type: | Granodiorite |
| Structure: | Rocks in the mine area have been affected by the NNW-trending Hoppe Springs Anticline, and later by steep normal faults with N-S, NE, and NW orientations. |
| Alteration processes: | An extensive alteration aureole (five kilometers by two kilometers) formed in the Cambrian Secret Canyon and Dunderberg Shale Formations surropunding the Cretaceous granodirite stock. Alteration consistes of an early biotite hornfels replaced in part by a diopside-orthoclase hornfels. Skarn alteration is zoned from a garnet-dominated assemblage adjacent to the stock to a garnet-pyroxene skarn to a calcite-diopside-quartz-kspar-tremolite skarn, to distal biotite hornfels. Retrograde alteration consists of quartz-calcite-iron oxide assemblage afterg arnet and a subordinate quartz-calcite-epidote-iron oxide-amphibole-chlorite assemblage after garnet-pyroxene. |
| DEP | 10310557 |
| Reference | {Deposit:: NBMG MI-96}{Deposit:: MI-97}{Deposit:: Map 91}{Deposit:: NBMG Bull 57, 1960}{Deposit:: Myers, G., Dennis, M. D., Wilkinson, W. H., and Wendt, C. J., 1991, Precious Metal Distribution in the Mount Hamilton Polymetallic Skarn System, Nevada: in Raines, G.L., Lisle, R.E., Schafer, R.W. and Wilkinson, W.H., Eds., Symposium Proceedings, Geology and Ore Deposits of the Great Basin, Geologic Society of Nevada and the U.S. Geological Survey, April 1-5, 1990, p. 677-685.}{Deposit:: Myers, G., Dennis, M. D., Wilkinson, W. H., and Wendt, C. J., 1991, Precious Metal Distribution in the Mount Hamilton Polymetallic Skarn System, Nevada:reprinted in Geology and Gold Deposits of Eastern Nevada; Bald Mountain Mine, Alligator Ridge, Robinson Project, Mount Hamilton Mine, Jones, A. Elizabeth, Ed., Special Publication - Geological Society of Nevada, Report: 23}{Deposit:: Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Database of significant deposits of gold, silver, copper, lead, and zinc in the United States; Part A, Database description and analysis; part B, Digital database: U.S. Geological Survey Open-File Report 98-206, 33 p., one 3.5 inch diskette.} |
| Reporter | LaPointe, D.D., Schruben, Paul G. |