Mine detail: Griffen Property

Previously called 'A. Griffen Ranch'

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Location

Lat / long:

38.2939, -105.29307

Resource(B)

Primary:	Barium-Barite, Lead, Thorium, Stone, Crushed/Broken
Secondary:	Uranium, Fluorine-Fluorite, Copper
Ore:	Thorite
Gangue:	Chalcopyrite, Fluorite, Hematite, Limonite, Pyrite, Quartz, Siderite, Barite, Galena
Discovery year:	1951

Production

Operation type:	Surface
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Hornblende-Plagioclase Gneiss And Alaskitic Granite Gneiss
Host type:	Gneiss
Associated rock:	Lamprophyre
Associated type:	Plutonic Rock,Lamprophyre
Structure:	Wet Mountains, Nw-Trending Shear Zones
Tectonic:	Central Cordillera (Southern Rocky Mountains)
Alteration processes:	Moderate Wallrock Silicification And Pyritization

References

MRDS	D008929
DEP	10101768
Reference	{Deposit:: CHRISTMAN, R.A., HEYMAN, A.M., DELLWIG, L.F, AND GOTT, G.B., 1953, THORIUM INVESTIGATIONS 1950-52, WET MOUNTAINS, COLORADO: USGS CIRCULAR 290, P. 22, 25.}{Deposit:: NELSON-MOORE, J.L., COLLINS, D.B. AND HORNBAKER, A.L., 1979, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULLETIN 40, P. 144}{Deposit:: TAYLOR, R.B., SCOTT, G.R., WOBUS, R.A., EPIS, R.C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE ROYAL GORGE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-869, 1:62,500}
Reporter	Collins, Donna B.