Mine detail: Fourmile Creek District

Previously called 'Fourmile DistrictTimberlake Creek District'

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Location

Lat / long: 40.85496, -107.68011

Resource(M)

Primary: Gold
Secondary: Silver
Tertiary: Thorium, Titanium, Metal, REE, Niobium (Columbium), Iron
Ore: Columbite, Euxenite, Ilmenite, Magnetite, Rutile
Discovery year: 1891

Production

Operation type: Unknown
Deposit type: Placer
Production size: Small
Development status: Past Producer
First production started: 1892
Last production ended: 1940

Geology

Host rock:Unconsolidated Deposits--Alluvium;Cathedral Bluffs Member Of Wasatch Formation
Host type:Sand and Gravel,Conglomerate
Associated rock:Upper Tertiary Intrusive Rocks (Pliocene And Miocene)
Associated type:Trachyte,Basalt
Structure:Washakie Basin
Tectonic:Colorado Platform

References

MRDSD009749
DEP10013454
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:: MARKS, J.H., 1915, PRELIMINARY REPORT, THE TIMBERLAKE OR FOURMILE PLACER DISTRICT, MOFFAT COUNTY: COLORADO STATE PLAN. COMM. UNPUB. REPT., 9 P.}{Deposit:: GALE, H.S., 1908, GOLD PLACER DEPOSITS NEAR LAY, ROUTT COUNTY, COLORADO: USGS BULL. 340, P. 84-95.}{Deposit:: Dunn, L.G., 2003, Colorado Mining Districts--A Reference: Golden, Colo., Colorado School of Mines Library, p. 220-221.}{Production:: 1932-40 FROM VANDERWILT, J.W., 1947, MINERAL RESOURCES OF COLORADO, P. 146; 1911-1931 FROM MINERAL RESOURCES OF THE U.S.}
ReporterSchwochow, Stephen D.