Commodities
PrimaryCopper, Gold
SecondarySilver, Zinc, Lead
TertiaryTungsten, Barium-Barite
Commodity typeB
Deposit
Deposit typereplacement, veins
Model59: Skarn Cu
Deposit sizeM
Orebody formtabular to irregular
Ore controlOre is localized by proximity of favorable reactive host rocks to intrusives, coupled with fault intersections.
Materials
Ore mineralsMalachite, Chalcanthite, Cerussite, Cerargyrite, Duftite, Azurite, Galena, Bornite, Chalcopyrite, Sphalerite, Chalcocite, Tetrahedrite, Scheelite, Pyromorphite
GangueCalcite, Garnet, Tremolite, Quartz, Fluorite, Wollastonite, Halloysite, Pyrite, Barite
Geology
Host rockLimestone,Skarn (Tactite),Siltstone · "Devils Gate Limestone (copper host rock)", "Webb Formation siltstone (gold host rock)"
Associated rockQuartz Monzonite,Porphyry · Chainman Shale
StructureNorth- to northeast-trending Bunker Hill fault; E-W-trending Bald Mountain fault
Alterationsericitization, silicification
Economic & production
Development statusPast Producer
First production1870
Last production1959
Discovery year1870
Identification
Deposit ID10310317
MRDS IDM233382
Alternate namesBullion Copper-Gold Project, Polymetallic prospect, Nevada Bunker Hill Mines, Aladdin Claim, Blue Sky Claim, Tripoli Claim, Webfoot Claim, Mahogany Claim, Standing Elk Claim, Hoffman Claim, Mounted Ledge Claim, Bullion Claim, Cleveland Claim, Portal Claim
RegionNA
Data scoreB
Coordinates40.51658, -116.01063
References
Ketner, K.B., and Smith, Jr., J.F., Geology of the Railroad Mining District, Elko County, Nevada. USGS Bulletin 1162-BSmith, R.M., Mineral Resources of Elko County, Nevada, USGS Open File Report, 1976-56Granger, A.E., et al., 1957, Geology and Mineral Resources of Elko County, Nevada, NBMG Bulletin 54Emmons, W.H., 1910, A Reconnaissance of some Mining Camps of Elko, Lander, and Eureka Counties, Nevada. USGS Bulletin 408.Mines Register, 1937.La Pointe and others, 1991, NBMG Bull. 106NBMG MI-96; MI-97.Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Significant deposits of gold, silver, copper, lead, and zinc in the United States: U.S. Geological Survey Open-File Report 90-206A, 33 p.; 98-206B. one 3.5 inch diskette.Royal Standard Minerals website, 2006 http://www.royalstandardminerals.com/