Buckhorn

The Buckhorn is a gold and silver mine located in Eureka county, Nevada at an elevation of 6,719 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: Buckhorn

State: Nevada

County: Eureka

Elevation: 6,719 Feet (2,048 Meters)

Commodity: Gold, Silver

Lat, Long: 40.18861, -116.48889

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Satelite image of the Buckhorn

Buckhorn MRDS details

Commodity

Primary: Gold
Primary: Silver
Tertiary: Arsenic
Tertiary: Mercury
Tertiary: Tungsten
Tertiary: Thallium
Tertiary: Antimony
Tertiary: Copper
Tertiary: Zinc

Location

State: Nevada
County: Eureka
District: Buckhorn District

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Type: Surface

Ownership

Owner Name: Cominco American, Inc.

Owner Name: Cominco American, Inc./Equinox Resources Ltd. Joint Venture

Production

Year: 1910
Material type: ORE-AU, AG
Description: Ap_Grade: ^5.23 Opt Au, 49.3 Opt Ag
Year: 1932
Time Period: 1931-32
Material type: ORE-AU, AG
Description: Cp_Grade: ^0.23 Opt Au, 1.85 Opt Ag
Year: 1916
Time Period: 1910-1916
Material type: ORE-AU, AG
Description: Cp_Grade: ^0.15 Opt Au, 1.25 Opt Ag
Year: 1916
Material type: ORE-AU, AG
Description: Ap_Grade: ^0.18 Opt Au, 1.62 Opt Ag
Year: 1915
Material type: ORE-AU, AG
Description: Ap_Grade: ^0.14 Opt Au, 1.02 Opt Ag
Year: 1931
Material type: ORE-AU, AG
Description: Ap_Grade: ^0.81 Opt Au, 5.96 Opt Ag
Year: 1914
Material type: ORE-AU, AG
Description: Ap_Grade: ^0.18 Opt Au, 1.47 Opt Ag

Deposit

Record Type: Site
Operation Category: Producer
Deposit Type: Hot Spring
Operation Type: Unknown
Year First Production: 1910
Discovery Year: 1908
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Basin And Mountains

Mineral Deposit Model

Model Name: Epithermal vein, Comstock

Orebody

Not available

Structure

Type: R
Description: Roberts Mountains Thrust

Type: L
Description: A System Of Parallel Normal Faults Strikes N10w And Controls Mineralization. Displacements Are Less Than A Few Hundred Feet.

Alterations

Alteration Type: L
Alteration Text: See Comments

Rocks

Name: Andesite
Role: Host
Age Type: Associated Rock
Age in Years: 16.300000+-0.900000
Age Young: Miocene

Name: Andesite
Role: Associated
Age Type: Associated Rock
Age in Years: 16.300000+-0.900000
Age Young: Miocene

Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Miocene

Analytical Data

Analytical Data: AS, HG, W, TL, SB ARE ENRICHED IN THE DEPOSIT. A SLIGHT ENRICHMENT OF CU AND ZN IN THE SULFIDE ZONE MAY INDICATE A DEPTH ZONATION.

Materials

Ore: Montmorillonite
Ore: Sericite
Ore: Quartz
Ore: Goethite
Ore: Gypsum
Ore: Calcite
Ore: Pyrite
Ore: Jarosite
Ore: Kaolinite
Ore: Marcasite

Comments

Comment (Geology): SEE WELLS AND ELLIOT (1969) USGS OPEN-FILE REPORT FOR GEOCHEMICAL AND GEOLOGIC MAPS OF THE MINE AREA. BASALTIC ANDESITE FLOWS ARE ABOUT 400 FT. THICK AS DETERMINED FROM RESISTIVITY MEASUREMENTS. BENEATH THE TERTIARY ROCKS ARE EITHER THE CHERTY FOURMILE CANYON FORMATION, OR CARBONATES OF THE LOWER PLATE ASSEMBLAGE. EXTENSIONS OF THE JURASSIC MILL CANYON STOCK MAY BE PRESENT AT DEPTH. RHYOLITE PLUGS AND FLOWS (15.3, 0.4 MA) EXPOSED FOUR MILES SOUTHWEST OF MINE MAY BE RELATED TO HYDROTHERMAL SYSTEM RESPONSIBLE FOR AU MINERALIZATION AT BUCKHORN.

Comment (Reserve-Resource): 1984 RESERVES CALCULATED USING CUTOFF OF 0.02 OPT AU.

Comment (Development): DEVELOPMENT ARE $12 MILLION. PRODUCTION COSTS ARE $200/OZ GOLD.

Comment (Development): THE FIRST CLAIMS WERE STAKED IN 1908. IN 1910, BUCKHORN MINES CO. WAS ORGANIZED AND A MILL WAS CONSTRUCTED IN 1913. THIS CYANIDE PLANT OPERATED 1914-1916, PROCESSING OXIDIZED ORE MINED BY GLORY HOLE METHOD. PARDNERS MINES CORP. REOPENED THE MINE AND OPERATED A FLOTATION MILL 1935-1937 TO TREAT SULFIDE ORE. FROM 1938 TO 1978 PRODUCTION WAS LIMITED TO WORKING OF THE DUMPS. IN 1978, BAR RESOURCES LTD. ATTEMPTED TO PROCESS OXIDE ORE FROM AN OPEN PIT, BUT FAILED DUE TO MINING AND TREATMENT PROBLEMS CAUSED BY HIGH CLAY CONTENT OF THE ORE. BETHLEHEM COPPER CORP. ACQUIRED AN INTEREST IN THE PROPERTY IN 1979. COMINCO AMERICAN'S INVOLVEMENT BEGAN IN 1980 WITH THE PURCHASE OF BETHLEHEM COPPER. DURING 1980, BETHLEHEM BLOCKED OUT A POTENTIALLY BULK-MINEABLE OREBODY IN THE AREA OF THE 1978 BAR RESOURCES PIT. A FEASIBILITY STUDY WAS INITIATED IN MARCH 1983. CONSTRUCTION BEGAN IN SEPTEMBER AND GOLD WAS POURED IN JUNE 1984. ; ECON.COM: TOTAL CAPITAL COSTS FOR COMINCO AMERICAN MINE

Comment (Deposit): ORE OCCURS AS THREE LENSES (NORTH BUCKHORN, JUNKYARD, GLORY HOLE) ALONG A ZONE 3000 FT. LONG AND 100-1000 FT. WIDE. BARREN AREAS BETWEEN ORE LENSES TYPICALLY CONTAIN LESS THAN 50 PPB GOLD.

Comment (Workings): PRIOR TO 1985, MINE WORKINGS CONSISTED OF TWO GLORY HOLES AND A 1,750 FT. HAULAGE ROAD, ALONG WITH EXTENSIVE SUBSIDIARY WORKINGS. IN 1985, ORE WAS BEING MINED BY OPEN PIT AT A RATE OF 750,000 TONS PER YEAR WITH AN AVERAGE STRIPPING RATIO OF 1.38:1.

Comment (Deposit): Discovery Year: 1908-1909

Comment (Commodity): AG:AU RATIO 15:1. GOLD RECOVERY IS 67%.

Comment (Production): ONLY CUMULATIVE PRODUCTION FIGURES AVAILABLE FOR 1932 AND 1936 PRODUCTION.

References

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.

Reference (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.

Reference (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.

Reference (Deposit): PLAHUTA, J.T., 1985, GEOLOGY OF THE BUCKHORN MINE, EUREKA COUNTY, NEVADA, IN GEOLOGICAL SOCIETY OF NEVADA SPECIAL PUBLICATION #3.

Reference (Deposit): VANDERBURG, W.O., 1938, RECONNAISSANCE OF MINING DISTRICTS IN EUREKA COUNTY, NEVADA, USBM INF. CIRC. 7022.

Reference (Deposit): NBMG, 1994, MI-1993

Reference (Deposit): VANDERBURG, W.O., 1938

Reference (Deposit): NEVADA DEPT. OF MINERALS,1994

Reference (Deposit): THE MINING RECORD,V.104, NO.41

Reference (Production): VANDERBURG, W.O., 1938, RECONNAISSANCE OF MINING DISTRICTS IN EUREKA COUNTY, NEVADA, USBM INF. CIRC. 7022 NBMG MI-1993

Reference (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.

Reference (Reserve-Resource): PLAHUTA, J.T., 1985, GEOLOGY OF THE BUCKHORN MINE, EUREKA COUNTY, NEVADA, IN GEOLOGICAL SOCIETY OF NEVADA SPECIAL PUBLICATION #3. NBMG MI-1993

Nevada Gold

Nevada has a total of 368 distinct gold districts. Of the of those, just 36 are major producers with production and/or reserves of over 1,000,000 ounces, 49 have production and/or reserves of over 100,000 ounces, with the rest having less than 100,000 ounces. Read more: Gold Districts of Nevada.