Mine detail: Joker Pit

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Location: Moffat County, Colorado, United States, North America
Lat / long: 40.75663, -107.72761
dep_id: 10013445
mrds_id: D009738
Commodity type: metallic
Major mineral: Gold, Thorium, Titanium, Metal, Niobium (Columbium), Iron, REE
Operation type: Unknown
Deposit type: Fossil Placer
Production size: Small ammount of material produced
Development status: Producer
ore: Columbite, Euxenite, Gold, Ilmenite, Magnetite, Monazite, Rutile
gangue: Garnet, Quartz, Zircon
conc_proc: Gravity Concentration And Streamflow Processes
Reporter: Schwochow, Stephen D., Spanski, Gregory T.
hrock_unit: Unconsolidated Deposits--Alluvium;Cathedral Bluffs Member Of Wasatch Formation
hrock_type: Conglomerate
Structure: Washakie Basin
tectonic: Colorado Platform
References:
  • 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.
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