Mine detail: Aurora Mine Area

Previously called 'EsmeraldaCambridgeOld Humboldt Mine areaHumboldt West claimHumboldt East claimHumboldt veinProspectus veinMartinezJuniata MineDel Monte MineWide West MineJohnson MinePond MineChihuahua MineGaribaldi MineAntelope MineUtah MineSilver HillMiddle HillLast Chance HillAurora MineAurora Partnership MineChesca Mine'

<< Back to the map

Location

Lat / long:

38.28631, -118.90179

Resource(M)

Primary:	Gold, Silver
Ore:	Gold, Tetrahedrite, Electrum, Acanthite, Naumannite, Bromargyrite, Chalcopyrite, Pyrite
Gangue:	Quartz, Adularia, Calcite
Orebody form:	lenses and stringers
Discovery year:	1860

Production

Operation type:	Surface-Underground
Deposit type:	epithermal vein, typically with little or no wallrock dissemination
Production size:	Large
Development status:	Producer
Production years:	1860-1869; 1914-1918; 1930s, 1983, and 1988-1998 with minor production in intervening years
First production started:	1860
Last production ended:	1998

Geology

Host type:	Andesite,Latite
Associated type:	Rhyolite,Basalt,Granite
Structure:	A young, less than 3 Ma old, broad regional upwarp extends form the southwest of the Bodie Hills through the Bodie District to the area of the Aurora District. This upwarp may continue to the northeast, south of the Borealis mine., Steep N-S striking faults offset the mineralized NE-striking faults.
Alteration processes:	Progressive weak to strong propylitic alteration with quartz-illite alteration surrounding silicification in the mineralized faults.

References

MRDS	W002908
DEP	10310395
Reference	{Deposit:: Ross, D.C., 1961, Geology and Mineral Deposits of Mineral County, Nevada: NBMG Bull 58}{Deposit:: Hill, J.M., 1915, Some Mining Districts in Northeastern California and Northwestern Nevada: USGS Bull 594}{Deposit:: Ferguson, H.G., 1929, The Mining Districts of Nevada: Econ Geol, v. 24, no. 2, p 115-48.}{Deposit:: Green, W.R., 1962, Structural Control of Mineralization at the Aurora Mining District, Mineral County, Nevada: M.S. Thesis, Univ. of Nevada.}{Deposit:: Vanderburg, W.O., 1937, Recon. of Mining Districts in Mineral County, Nevada: U.S. Bur. Mines Inf. Circ. 6941, 79p.}{Deposit:: Koschmann, A.H. and Bergandahl, M.H., 1968, Principal Gold-Producing Districts Of The U.S.: USGS Prof. Paper 610, p.188.}{Deposit:: Lincoln, F.C. 1923, Mining Districts of Nevada: Reno, Nevada Newsletter Pub. Co. p.137-8.}{Deposit:: State Division of Mine Inspection, Dec. 1983, Directory of Nevada Mine Operations Active During Calendar Year 1983.}{Deposit:: NBMG Mining District Files, File 189, Press Clippings.}{Deposit:: Osborne, M.A., 1991, Epithermal Mineralization at Aurora, Nevada: Proceedings of the GSN 1990 Symposium, p. 1097-1110.}{Deposit:: NBMG, 1990, The Nevada Mineral Industry: NBMG Special Publication MI-1989-2004.}{Deposit:: Nevada Division of Minerals, Major Mines of Nevada 1989-2004.}{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:: Metallic Ventures Gold Inc. press releases, 1/20/2004, 11/12/04.}
Reporter	LaPointe, D.D., Schruben, Paul G.