Mine detail: Surprise Mine

Previously called ''

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Location

Lat / long: 40.62018, -117.02455

Resource(M)

Primary: Gold, Silver
Secondary: Copper
Ore: Chrysocolla, Malachite
Gangue: Calcite, Chlorite, Garnet, Goethite, Quartz
Orebody form: IRREGULAR
Discovery year: 1938

Production

Operation type: Unknown
Deposit type: Replacement
Production size: Small
Development status: Producer
Production years: UNDERGROUND: 1937, 1938, 1941, 1945, 1947, 1954. OPEN PIT: 1987-PRESENT (12/92).
First production started: 1937

Geology

Host rock:Harmony Formation;Harmony Formation
Host type:Sandstone
Associated rock:Battle Formation; Antler Peak Limestone
Associated type:Porphyry
Structure:Nw-Trending Fault; Normal Faults
Alteration processes:Strong Silicification And Retrograde Alteration Of Prograde Garnet Skarn.

References

MRDSM231376
DEP10044055
Reference{Deposit:: ROBERTS, R. J. AND ARNOLD, D. C., 1965, ORE DEPOSITS OF THE ANTLER PEAK QUADRANGLE, HUMBOLDT AND LANDER COUNTIES, NEVADA, USGS PROF. PAPER 459-B, 94 PP.}{Deposit:: BATTLE MOUNTAIN GOLD COMPANY, 1988, ANNUAL REPORT FOR 1987.}{Deposit:: NBMG MINING DISTRICT FILE 147, NUMEROUS PRESS CLIPPINGS.}{Deposit:: BONHAM, H. F., 1986, BULK-MINEABLE PRECIOUS METAL DEPOSITS AND PROSPECTS IN NEVADA, NBMG MAP 91.}{Deposit:: NBMG, 1988, THE NEVADA MINERAL INDUSTRY - 1987, NBMG SPECIAL PUBLICATION MI-1987.}{Deposit:: BUFFA, R. AND SCHAFER, R., EDS., 1988, FALL FIELD TRIP GUIDEBOOK, THE GEOLOGICAL SOCIETY OF NEVADA, RENO, P. 271-276.}{Deposit:: NBMG, 1994, MI-1993}{Production:: PRE-1987 ANNUAL AND CUMULATIVE PRODUCTION: ROBERTS, R. J. AND ARNOLD, D. C., 1965, ORE DEPOSITS OF THE ANTLER PEAK QUADRANGLE, HUMBOLDT AND LANDER COUNTIES, NEVADA, USGS PROF. PAPER 459-B, 94 PP. 1987 PRODUCTION: BATTLE MOUNTAIN GOLD COMPANY, 1988, ANNUAL REPORT FOR 1987. NBMG MI-1993}{Reserve-Resource:: 1986-1988 FIGURES: BONHAM, 1988, PRESS CLIPPINGS. NBMG MI-1993}
ReporterLa Pointe, D.D. (Tingley, J.V.), Phinisey, J. D. (Marcus, S.), Li, Zhiping (Moyer, Lorre A.)