Mine detail: Little Bald Mountain Mine

Previously called 'LBM ClaimsNorth pitSouth pitLittle Bald Mountain IILbm Mine'

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Location

Lat / long:

39.91793, -115.54733

Resource(M)

Primary:	Gold, Silver
Tertiary:	Mercury
Ore:	Gold, Pyrite, Clay, Limonite
Discovery year:	1984

Production

Operation type:	Surface-Underground
Deposit type:	sediment-hosted disseminated gold
Production size:	Small
Development status:	Producer
First production started:	1985
Last production ended:	2004

Geology

Host rock:	Antelope Valley Limestone
Host type:	Sedimentary Rock
Associated rock:	Bald Mountain Stock
Associated type:	Quartz Monzonite,Porphyry
Structure:	The Bald Mountain district is located in an area of thinned crust along the eastern side of the Late Proterozoic rift that split the North American craton. It is also in the west-central portion of the Late Devonian-Early Mississippian Antler foreland basin, and near the eastern edge of deformation related to the late Paleozoic Humboldt orogeny To the west of the Bald Mountain district, geologic interpretations are dominated by recognition of Paleozoic deformation, whereas to the east, interpretations emphasize Mesozoic contraction and plutonism and Tertiary extension., The rocks in the mine area have been affected by N-trending faults and less prominent W-trending fractures.
Tectonic:	The Bald Mountain district is located in an area of thinned crust along the eastern side of the Late Proterozoic rift that split the North American craton. It is also in the west-central portion of the Late Devonian-Early Mississippian Antler foreland basin, and near the eastern edge of deformation related to the late Paleozoic Humboldt orogeny.
Alteration processes:	Alteration at the mine property consists predominantly of argillization and sericitization of igneous rocks, and sillicification of host rocks.

References

MRDS	M242962
MAS	320330513
DEP	10310383
Reference	{Deposit:: NBMG MI-86 through MI-02}{Deposit:: NBMG Map 91, 1st, 2nd, 3rd}{Deposit:: DEIS, 1995}{Deposit:: FEIS, 1995}{Deposit:: Hitchborn and others, 1996, Geology and Gold Deposits of the Bald Mountain Mining District, White Pine County, Nevada, in Geology and Ore Deposits of the American Cordillera Symposium Proceedings, eds. A. Coyner and P. Fahey.}{Deposit:: The Geological Society of Nevada 1996 Spring Field trip, Geology and Gold Deposits of Eastern Nevada, GSN Special Publication No. 23}{Deposit:: MASMILS 0320330513; Nevada Land Status, 1990}{Deposit:: www.placerdome.com}{Deposit:: Amer. Mines (1989) through Amer. Mines (1991-92)}{Deposit:: NBMG Mining District Files 323, Press}{Deposit:: GSN 1985 Meeting and Fall Field Trip Road Log}{Deposit:: Adamson, T.J., 1987, in Bulk Mineable Precious Metal Deposits of the Western U.S., 1987 GSN, Field Trip Guidebook and Technical Volume.}{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:: Nutt, C.J., Hofstra, A.H., Hart, K.S., and Mortensen, J.K., 2000, Structural setting and genesis of gold deposits in the Bald Mountain-Alligator Ridge area, east-central Nevada, in Cluer, J.K., Price, J.G., Struhsacker, E.M., Hardyman, R.F., and Morris, C.L., eds., Geology and Ore Deposits 2000: The Great Basin and Beyond: Geological Society of Nevada Symposium Proceedings, May 15-18, 2000, p. 513-537.}{Deposit:: BLM, 2004, Bald Mountain Mine Exploration Program Programmatic Environmental Assessment NV040-04-023, Case File # N78825.}{Deposit:: NEVADA BUREAU OF MINES & GEOLOGY, SPE. PUB. 10, 1990, P16.}{Deposit:: RANDOL MINING DIRECTORY, 1994/95, U.S. MINES & MINING COMPANIES, P331.}{Deposit:: RANDOL MINING DIRECTORY, 1996/97, U.S. MINES & MINING COMPANIES, P254.}{Deposit:: AMERICAN MINES HANDBOOK, 1996, P181.}
Reporter	Buckingham, David A., Paidakovich, Matthew E., La Pointe, D.D. (Tingley, J.V.), Li, Zhiping (Moyer, Lorre A.), LaPointe, D.D., Schruben, Paul G.