Post Deposit

Eureka County, Nevada, United States

GoldSilverArsenic

⌖ Show on map USGS source ↗

Description

Geologists Working For Western States Minerals Corporation

Commodities

PrimaryGold

SecondarySilver, Arsenic

Commodity typeM

Deposit

Model172: Carbonate-hosted Au-Ag

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, Marcasite

GangueAlunite, Barite, Calcite, Dickite, Goethite, Gypsum, Hematite, Illite, Jarosite, Kaolinite, Orpiment, Pyrite, Quartz, Realgar, Sericite, Stibnite

Geology

Host rockMudstone,Argillite,Siltstone,Sandstone,Limestone,Chert · Vinini Formation;Popovich Formation/Rodeo Creek Unit;Popovich Formation;Popovich Formation;;Roberts Moutain Formation

Associated rockDiorite · Goldstrike Stock;Goldstrike Stock;Unknown;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 ID10084949

MRDS IDW700371

Alternate namesBetze, Betze Deposit, Post/Betze, Upper Post, Post Mine, Deep Post, Lower Post

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, P21BONHAM, H.L., 1989, BULK-MINEABLE PRECIOUS-METAL DEPOSITS, IN, THE NEVADA MINERAL INDUSTRY, 1988, NEVADA BUREAU OF MINES AND GEOLOGY MI-1988, P21AREHART, 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.1505-1519ALL 1980-1988 BARRICK FIGURES ALL IN BONHAM, 1989. 1988 NEWMONT AND 1989 BARRICK FIGURES FROM BONHAM AND HESS, 1990.