Nevada · Eureka County
Producer

Deep Post Mine

Eureka County, Nevada, United States
GoldSilverArsenic
⌖ Show on mapUSGS source ↗
Description

Geologists working for Western States Minerals Corporation

Commodities
PrimaryGold
SecondarySilver, Arsenic
Commodity typeM
Deposit
Deposit typeepithermal, sediment-hosted, disseminated gold
Model173: Sediment-hosted Au
Deposit sizeL
Orebody formSTRATIFORM (APPROXIMATELY)
Ore controlSTRUCTURALLY CONTROLLED NEAR SOUTHERN TERMINUS; PENETRATIVE FARTHER NORTH. HIGH ANGLE FAULTS CONTROL HIGHER GRADE AU. IMBRICATE THRUSTS RELATED TO ROBERTS MT. THRUST OR LATER EVENT INFLUENCED ORE LOCALIZATION. OXIDE ORE GENERALLY OCCURS IN VININI FM.(OR NEWMONT'S RODEO CREEK UNIT); REFRACTORY SULFIDE ORE TYPICALLY OCCURS IN POPOVICH & ROBERTS MT. FORMATIONS. PLUTONIC ROCKS OFTEN ACTED AS DAMS TO MINERALIZING FLUIDS.
Materials
Ore mineralsGold, Pyrite, Arsenopyrite, Marcasite, Orpiment, Realgar, Kaolinite, Dickite, Sericite, Illite, Alunite, Barite, Stibnite, Goethite, Hematite, Jarosite, Gypsum, Calcite
GangueQuartz
Geology
Host rockArgillite,Chert,Mudstone,Siltstone,Sandstone,Limestone · "VININI FM.", "POPOVICH FM./RODEO CREEK UNIT", "POPOVICH FORMATION", "ROBERTS MOUTAIN FM."
Associated rockDiorite,Granodiorite,Quartz Monzonite,Porphyry,Latite · "GOLDSTRIKE STOCK", "LATITE SILL", "DIORITE SILL"
StructureROBERTS MOUNTAIN THRUST, N-NNW-TRENDING ZONE CONSIDERED MAIN HYDROTHERMAL CONDUIT; NNW TO N, AND NE-STRIKING FAULTS
Tectonic settingBASIN AND RANGE; ORIGINALLY, W. EDGE OF N. AMERICAN CRATON
AlterationDecarbonization; argillic and silicic hydrothermal; oxidation.
Economic & production
Development statusProducer
First production1986
Discovery year1982
Identification
Deposit ID10310437
MRDS IDW700371
RegionNA
Data scoreA
Coordinates40.97518, -116.34732
References
Rocky Mountain Pay Dirt, March, 1988, p. 4a-5a.Rocky Mountain Pay Dirt, June, 1988, p. 3a.Knutsen, G. C., Bettles, K. H., Sulfrian, C. E., and Zimmerman, C. J., 1987, Discovery and geology of the Post Gold Deposit, Eureka County, Nevada: Society of Mining Engineers Preprint Number 87-86, 6 p.Albino, George, 1993 Oral Communication, July 22, 1993, Reno, NVArehart, G.B., Foland, K.A., Naeser, C.W., and Kesler, S.E., 1993, 40Ar/39Ar, K/Ar, and Fission Track Geochronology of Sediment-Hosted Disseminated Gold Deposits at Post-Betze, Carlin Trend, Northeastern Nevada; Economic Geology, v. 88, no. 3, P. 622-646Bonham, H.L., 1988, Bulk-Mineable Precious-Metal Deposits, in, The Nevada Mineral Industry, 1987, Nevada Bureau of Mines and Geology MI-1987Bonham, H.L., 1986, Bulk-Mineable Precious-Metal Deposits and Prospects, Nevada Bureau of Mines and Geology Map 91Bonham, H.L., 1991, Bulk-Mineable Precious-Metal Deposits and Prospects, Nevada Bureau of Mines and Geology Map 91, 3rd ed.Environmental Assessment, 1987, Nevada Bureau of Mines and Geology FilesNevada Bureau of Mines and Geology Mining District File 115, Numerous Press ClippingsLauha, E.A., and Bettles, K.H., 1993, A Geologic Comparison of the Post/Betze and Purple Vein Deposits of the Goldstrike and Meikle Mines, Nevada, SME Preprint 93-170, presented at SME Annual Meeting, Reno, NV, Feb. 15-18, 1993Bonham, H.L., and Hess, R.H., 1990, Bulk-Mineable Precious-Metal Deposits, in The Nevada Mineral Industry, 1989, Nevada Bureau of Mines and Geology MI-1989, p. 21Bonham, H.L., 1989, Bulk-Mineable Precious-Metal Deposits, in The Nevada Mineral Industry, 1988, Nevada Bureau of Mines and Geology MI-1988, p.21Arehart, G. B., Eldridge, C.S., Chryssoulis, S.L., Kesler, S.E., 1993, Ion Microprobe Determination of Sulfur Isotope Variations in Sulfides from the Post/Betze Sediment-Hosted Disseminated Gold Deposit, Nevada, USA, Geochimica et Cosmochimica Acta, v.57, pp.1505-1519Long, 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.Thompson, Tommy, Teal, Lewis, and Meeuwig, Richard, editors, 2002, Gold Deposits of the Carlin Trend, NBMG Bulll. 111.Chris H. Clode, Steven R. Grusing, Ivan M. Johnston, and Dean G. Heitt, 2002, Geology of the Deep Star Gold Deposit, in Gold Deposits of the Carlin Trend, NBMG Bull. 111.LONG AND OTHERS, 1998