Mine detail: Buckhorn Mine

Previously called 'Junkyard pitSouth Buckhorn workingsGhost ZoneGlory HoleNBMG sample locations 1512-1516, 1551-1554, 1557, 1558North Buckhorn pit'

<< Back to the map

Location

Lat / long:

40.18852, -116.48981

Resource(M)

Primary:	Gold, Silver
Secondary:	Copper, Zinc
Tertiary:	Thallium, Antimony, Mercury, Tungsten, Arsenic
Ore:	Gold, Kaolinite, Montmorillonite, Adularia, Jarosite, Goethite, Pyrite, Sericite, Calcite, Gypsum, Plagioclase, Limonite, Marcasite
Gangue:	Quartz
Orebody form:	tabular
Discovery year:	1908

Production

Operation type:	Surface
Deposit type:	fault breccia; vein
Production size:	Small
Development status:	Producer
Production years:	1910; 1914-1916; 1931-1932; 1936; 1984-1991
First production started:	1910

Geology

Host type:	Andesite
Associated type:	Rhyolite
Structure:	A system of parallel normal faults strikes N10W and controls mineralization. Displacements are less than a few hundred feet., Roberts Mountains Thrust
Alteration processes:	Argillization of basaltic andesite host rock is the main alteration. Underlying and overlying sediments are silicified. The upper two-thirds (100 ft.) of the mineralized zone is oxidized, the lower third is pyritic. The oxidation of the upper portion is believed to be hypogene, not supergene. In the oxide zone, white kaolinite-rich rocks are found at the center surrounded by purple montmorillonite-rich rocks in peripheral locations. The change in color typically marks the edge of the possible ore zone. Major elements introduced during alteration include Si, Al, K, and Ti. Major elements depleted in altered rocks are Mg, Ca, Na, Mn.

References

MRDS	W016362
DEP	10310544
Reference	{Deposit:: Roberts, R. J., Radtke, A. S., Coats, R. R., 1971, Gold-bearing deposits in north central Nevada and southwestern Idaho, Economic Geology, v. 66, p. 14-33.}{Deposit:: Roberts, R. J., Montgomery, K. M., Lehner, R. E., 1967, Geology and mineral resources of Eureka County, Nevada, Nevada Bureau of Mines Bull. 64, p. 68-69.}{Deposit:: Wells, J. D., Stosier, L. R., Elliott, J. E., 1969, Geology and Geochemistry of the Cortez Gold Deposit, Nevada, Economic Geology, v. 64, p. 526-537.}{Deposit:: Plahuta, J.T., 1985, Geology of the Buckhorn Mine, Eureka County, Nevada, in Geological Society of Nevada Special Publication #3.}{Deposit:: Monroe, S.C., et al, 1988, Geology and Mineralization at the Buckhorn Mine, Eureka County, Nevada, in Bulk Mineable Precious Metal Deposits of the Western United States, Symposium Proceedings, the Geological Soceity of Nevada, Reno, p. 273-291.}{Deposit:: Vanderburg, W.O., 1938, Reconnaissance of Mining Districts in Eureka County, Nevada, USBM Inf. Circ. 7022.}{Deposit:: NBMG MI-79; NBMG MI-83 to MI-00; NBMG Map 91 1st, 2nd, 3rd; Amer. Mines (1989), 1989 thru (2000), 1999}{Deposit:: Nevada Dept. of Minerals,1994}{Deposit:: The Mining Record,v.104, no.41}{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}
Reporter	LaPointe, D.D. , Schruben, Paul G.