Mine detail: Joker Pit

Previously called ''

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Location

Lat / long:

40.75663, -107.72761

Resource(M)

Primary:	Gold, Thorium, Titanium, Metal, Niobium (Columbium), Iron, REE
Ore:	Columbite, Euxenite, Gold, Ilmenite, Magnetite, Monazite, Rutile
Gangue:	Garnet, Quartz, Zircon

Production

Operation type:	Unknown
Deposit type:	Fossil Placer
Production size:	Small
Development status:	Producer

Geology

Host rock:	Unconsolidated Deposits--Alluvium;Cathedral Bluffs Member Of Wasatch Formation
Host type:	Conglomerate
Structure:	Washakie Basin
Tectonic:	Colorado Platform

References

MRDS	D009738
DEP	10013445
Reference	{Deposit:: PARKER, B.H., JR., 1974, THE PLACERS OF MOFFAT COUNTY, IN GOLD PLACERS OF COLORADO: COLORADO SCHOOL OF MINES QUART., V. 69, NO. 4, P. 150-168.}{Deposit:: TWETO, OGDEN, 1976, GEOLOGIC MAP OF THE CRAIG 1X2 QUADRANGLE, NORTHWESTERN COLORADO: USGS MAP I-972}{Deposit:: SNOW, E.P., 1895, THE FOURMILE PLACER FIELDS OF (MOFFAT COUNTY), COLORADO AND WYOMING: ENG. MINING JOUR., V. 60, P. 102-105}{Deposit:: HOOVER, HERBERT C., 1897, GEOLOGY OF THE FOUR-MILE PLACER MINING DISTRICT (MOFFAT COUNTY), COLORADO: ENG. MINING JOUR., V. 63, P. 510.}{Deposit:: 5) MINING RECORD (VARIOUS ARTICLES): 2/16/83, 4/6/83, 4/13/83, 6/8/83, 6/29/83, 9/28/83, 11/30/83.}{Deposit:: 6) DENVER POST 6/29/84.}
Reporter	Schwochow, Stephen D., Spanski, Gregory T.