Mine detail: Roscoe Placers

Previously called ''

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Location

Lat / long: 39.7461, -105.43642

Resource(M)

Primary: Gold, Silver
Ore: Gold, Silver
Gangue: Garnet, Magnetite, Pyrite
Orebody form: LENTICULAR, IRREGULAR

Production

Operation type: Unknown
Deposit type: Placer
Production size: Small
Development status: Past Producer
First production started: 1932
Last production ended: 1936

Geology

Host rock:Post-Piney Creek Alluvium;Piney Creek Alluvium
Host type:Sand and Gravel
Structure:Front Range Uplift, Denver Basin, Blackhawk Fault, Floyd Hill Fault Zone
Tectonic:Central Cordillera (Southern Rocky Mtns)
Alteration processes:Oxidized Au-Bearing Sulfides From Upstream Lode Mining And Milling Wastes

References

MRDSD010205
DEP10013746
Reference{Deposit:: PARKER, B.H., JR., 1974, GOLD PLACERS OF COLORADO: COLORADO SCHOOL OF MINES QUART., V. 69, NO. 3, P. 66, 98, 115-126.}{Deposit:: SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A.}{Deposit:: SHERIDAN, D.M., AND MARSH, S.P., 1976, GEOLOGIC MAP OF THE SQUAW PASS QUADRANGLE, CLEAR CREEK, JEFFERSON, AND GILPIN COUNTIES, COLORADO: USGS MAP GQ-1337.}{Deposit:: FORBES, R.H., 1933, THE HUMPHREYS GOLD CORPORATION DREDGING OPERATIONS ON CLEAR CREEK: MINES MAG., V. 23, NO. 5, P. 9-10.}{Deposit:: GARDNER, E.D., AND GUITERAS, J.R., 1937, PLACER OPERATIONS OF HUMPHREYS GOLD CORPORATION, CLEAR CREEK, COLORADO; USBM IC-6961, 16 P.}{Production:: GARDNER AND GUITERAS (1937)}
ReporterWilson, Anna B., Schwochow, Stephen D.