Nevada · White Pine County
Producer

Robinson Mine

White Pine County, Nevada, United States
CopperGoldMolybdenumSilver
⌖ Show on mapUSGS source ↗
Description

Thomas Robinson (1868)

Commodities
PrimaryCopper, Gold
SecondaryMolybdenum, Silver
Deposit
Deposit typePorphyry Cu-Au
Model58: Porphyry Cu, skarn-related78: Porphyry Cu-Au
Deposit sizeL
Orebody formvariable from tabular to blanket to disseminated
Ore controlThe main influence on mineralizationi s the metamorphic aureole surrounding the porphyry intrusion, but mineralization also follows fractures in some cases.
Materials
Ore mineralsChalcocite, Chalcopyrite, Molybdenite, Chrysocolla, Malachite, Azurite, Cuprite, Copper, Bornite, Sphalerite, Galena
GanguePyrite, Chalcopyrite, Argentite, Sericite, Clay, Fluorite, Quartz, Magnetite, Limonite
Geology
Host rockLimestone,Porphyry,Quartz Monzonite,Siltstone,Sandstone · "Ely Limestone", "Chainman Shale"
Associated rockPorphyry,Quartz Monzonite,Rhyolite · Weary Flat quartz monzonite
StructureHost rocks have been folded, faulted, and fractured. Mineralization follows fractures in some cases., Rocks in the are folded into na east-trending anticline with moderate to gentle dipping flanks, later intruded by pluton and cut by nomal faults.
Tectonic settingPaleozoic Cordillerian miogeosyncline
AlterationMost significant is the hydrothermal alteration from monzonite intrusion. The deposit generally follows the typical porphyry copper deposit model in the pattern of alteration and mineralization. Anhydrous skarn developed in sedimentary rocks adjacent to potassically altered quartz monzonite. Peripheral to this is a quartz-sericite alteration zone followed by a quartz-clay-pyrite zone. Lacally present are advanced argillic alteration and some formation of retrograde hydrous skarn.
Economic & production
Development statusProducer
Production yearsLate 1800's-1978, 1986-1999, 2005-present
First production1860
Last production2009
Discovery year1868
Identification
Deposit ID10310402
MRDS IDW700594
Alternate namesAultman Pit, Kimberly Pit, Liberty Pit, Ruth Pit, Tripp Pit, Veteran Pit, Wedge Pit, Veteran Extension, Twin Peaks, Puritan, Pilot Knob, Northwest Ruth, New Liberty, Nellie, Los Angeles, Kranovich, J. D. Hill, Alpha, Rob Roy, Robinson Gold
RegionNA
Data scoreA
Coordinates39.25661, -114.99948
References
McDowell, F.W., and Kulp, J.L., 1967, Age of intrusion and ore deposition in the Robinson mining district of Nevada: Economic Geology, v. 62, p. 905?909The Geological Society of Nevada 1996 Spring Field trip, Geology and Gold Deposits of Eastern Nevada, GSN Special Publication No. 23.Wilson, W. R., 1978, Geology of the Robinson Mining District, Nevada, Nevada Bureau of Mines and Geology Report 32, pp. 55 - 61.Spencer, A. C., 1917, The Geology and Ore Deposits of Ely, Nevada, USGS Professional Paper 96, 189 pp.Mining Magazine, January 1989, p. 44.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.Durgin, Dana, 1989, Alta Gold's Robinson Project, in GSN Special Pub. #9, Geology and Mineral Deposits of White Pine County, 1989 Spring Field Trip Guide Book, eds. Schafer and Buffa.Felix E. Mutschler, Steve Ludington, and Arthur A. Bookstrom, 1999, Giant Porphyry-Related Metal Camps of the World-A Database; USGS Open-File Report 99-556.Quadra Mining Ltd. news releases, 8/11/2004, 2/22/2005.NBMG MI-2004.http://www.quadramining.com/s/RobinsonMine.aspWestra, G., 1982, Alteration and mineralization in the Ruth porphyry copper deposit near Ely, Nevada, Economic Geology; v. 77; no. 4; p. 950-970Bauer, H.L., Jr., Breitrick, R.A., Cooper, J.J., and Anderson, J.A., 1966, Porphyry copper deposits in the Robinson mining district, Nevada, in Titley, S.R., and Hicks, C.L., eds., Geology of the porphyry copper deposits, southwestern North America: Univ. of AZ Press, Tucson, AZEinaudi, M.T., 1982, Description of skarns associated with porphyry copper plutons, in Titley, S.R., ed., Advances in geology of the porphyry copper deposits, southwestern North America: Tucson, University of Arizona Press, p. 139-183.James, L.P., 1976b, Zoned alteration in limestone at porphyry copper deposits, Ely, Nevada: Economic Geology, v. 71, p. 488?512.James, L.P., 1990, Gold in the Ely (Robinson) copper district, White Pine County, Nevada: U.S. Geological Survey Bulletin 1857?E, p. E28?E42.Maher, David, 1996, Stratigraphy, structure, and alteration of igneous and carbonate wall rocks at Veteran Extension in the Robinson (Ely) porphyry copper district, Nevada, in Coyner, A.R., and Fahey, P.L., eds., Geology and ore deposits of the American CordillianSeedorff, E., 1993, Robinson mining district geology and mineralization, summer field trip: Geological Society of Nevada Special Publication 17, 69 p.Shaver, S.A., and Jeanne, R.A., 1996, The geology and evolution of the weakly Au-(Cu)-mineralized far eastern side of the Robinson mining district, Ely, Nevada, in Coyner, A.R., and Fahey, P.L., eds., Geology and ore deposits of the American CordilleraWestra, G., 1979b, Porphyry copper genesis at Ely, Nevada, in Ridge, J.D., ed., Papers on mineral deposits of Western North America, The International association on the genesis of ore Deposits, Fifth Quadrennial Symposium Proceedings, v.2: Nevada Bureau of Mineshttp://www.quadramining.com/i/pdf/RobinsonNI43-101Final.pdfProduction Results from Quadra Mining Ltd. \nhttp://www.quadramining.com/s/RobinsonMine.asphttp://www.quadramining.com/i/pdf/RobinsonNI43-101Final.pdf, pg 68Revised Reserve Table as of Janurary 1, 2006\nhttp://www.quadramining.com/i/pdf/2006-01-20_NR.pdf