Mine detail: Mike Deposit

Previously called 'Main Mikepart of Newmont?s Carlin-South operationsWest Mike'

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Location

Lat / long:

40.8097, -116.2473

Resource(M)

Primary:	Gold, Silver
Secondary:	Copper, Zinc, Lead
Tertiary:	Tungsten, Molybdenum, Arsenic, Iron, Bismuth, Antimony
Ore:	Gold, Sphalerite, Galena, Chalcopyrite, Pyrite, Molybdenite, Quartz, Diopside, Garnet, Stibnite, Scheelite, Powellite
Gangue:	Pyrite
Orebody form:	tabular
Discovery year:	1989

Production

Operation type:	Surface
Deposit type:	disseminated; Pluton-related poly metallic skarn
Production size:	None
Development status:	Producer

Geology

Host rock:	Roberts Mountains Formation, Popovich Formation, Rodeo Creek Unit
Host type:	Limestone,Siltstone,Chert,Argillite,Hornfels,Mafic Intrusive Rock,Intermediate Volcanic Rock
Associated rock:	Richmond Stock, Welches Canyon Stock
Structure:	Deposits in the Maggie Creek subdistrict are primarily hosted by lower-plate carbonate and clastic rocks of Devonian and Silurian age exposed in a domed window through the Roberts Mountains allochthon. The Carlin window is an erosionally breached, northwest-trending anticlinorium, exposing an autochthonous core beneath upperplate, siliceous and carbonate-clastic rocks of Devonian to Ordovician age in the Roberts Mountains overthrust sheet. Lower-plate exposures are bound by high-angle, normal faults on the southeastern, southwestern, and northwestern flanks of the Schroeder Mountain uplift. The margins of the window are down-faulted, and disconformably overlain by volcaniclastic sedimentary rock and gravel of the Tertiary Carlin Formation. Most of the deposits are in the southwestern part of the Carlin Window in a mile-wide northwest-elongated belt of subdued topography along and in the footwall of the Good Hope reverse fault between Marys and Schroeder Mountains called the Tusc Corridor., Carlin-type gold mineralization is concentrated along the northwest-dipping Soap Creek fault, the northwest-striking, northeast-dipping Good Hope reverse fault, and the west-dipping Valley fault.
Alteration processes:	Alteration products include sooty pyrite/marcasite, variable silicification, kaolinite, sulfide-silica-matrix breccia, dissolution-collapse breccia, and quartz-orpiment veins.

References

DEP	10310468
Reference	{Deposit:: Schull, H.W., 1991, The Lithostratigraphy and Sedimentology of the Contact/Transition Between the Roberts Mountains Formation and the Western Facies Rocks in the Carlin Mining District, Eureka and Elko Counties, Nevada, in Raines, G.L., et al., eds., The Geology and Ore Deposits of the Great Basin, The Geological Society of Nevada, Reno, p. 705-712.}{Deposit:: Ekburg, C., Rota, J., and Arkell, B., 1991, Geology and Mineral Deposits of the Maggie Creek Subdistrict, Carlin Trend, Eureka County, Nevada, in Raines, G.L., et al., eds., The Geology and Ore Deposits of the Great Basin, The Geological Society of Nevada, Reno, p. 625-633.}{Deposit:: Rota, J., 1990, Geology and Mineral Deposits of the Maggie Creek Subdistrict, Carlin Trend, Eureka County, Nevada, Oral Presentation at Great Basin Symposium, The Geological Society of Nevada, Sparks, NV, April, 1990.}{Deposit:: Arkell, B., 1992, Geology of the Tusc and Mac Deposits, in Buffa, R. and Coyner, A., eds., Geology and Ore Deposits of the Great Basin-Field Trip Guidebook Compendium, The Geological Society of Nevada, Reno, p. 862-864.}{Deposit:: Mcfarlane, D., 1992, Gold Production on the Carlin Trend, in Buffa, R. and Coyner, A., eds., Geology and Ore Deposits of the Great Basin-Field Trip Guidebook Compendium, The Geological Society of Nevada, Reno, p. 841-843.}{Deposit:: NBMG, 1994, MI-1993}{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.}{Deposit:: John W. Norby and Michael J.T. Orobona, 2002, Geology and Mineral Systems of the Mike Deposit; in Gold Deposits of the Carlin Trend, NBMG Bull. 111.}
Reporter	LaPointe, D.D., Schruben, Paul G.