Mine detail: Copper Hill Mine

Previously called 'Gold EagleDelaware Claims'

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Location

Lat / long:

37.40029, -108.07343

Resource(M)

Primary:	Copper, Silver
Secondary:	Gold, Platinum, Palladium
Ore:	Bornite, Chalcocite, Enargite, Galena, Hematite, Magnetite, Malachite, Marcasite, Pyrite, Sphalerite
Gangue:	Ankerite, Apatite, Calcite, Fluorite, Garnet, Limonite, Quartz, Sanidine
Orebody form:	POD, VEINS, DISSEMINATED GRAINS
Discovery year:	1902

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Production years:	1911-1914, 1917
First production started:	1911
Last production ended:	1917

Geology

Host rock:	Cutler Formation
Host type:	Mudstone,Shale,Sandstone
Associated rock:	Granitic Rocks;Allard Stock
Associated type:	Syenite
Structure:	San Juan Uplift. Four Corners Platform. Northeast-Trending Fracture Zone, Short Discontinuous Faults Of Small Displacement, Intense Late-Stage Fracturing. La Plata Dome >15 Mi Diameter
Tectonic:	Central Cordillera (Southern Rocky Mountains)
Alteration processes:	Extreme Potassic Metasomatism, Sericitized And Felspathized Porphyry. Fe Oxidation, Oxidation Of Cu Sulfide

References

MRDS	D010812
DEP	10087912
Reference	{Deposit:: ECKEL, E.B., 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 219, P. 56, 63-65, 105-106.}{Deposit:: MERTIE, J.B., JR., 1969, ECONOMIC GEOLOGY OF THE PLATINUM METALS: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, P. 95.}{Deposit:: WERLE, J.L., IKRAMUDDIN, MOHAMMED, AND MUTSCHLER, F.E., 1984, ALLARD STOCK, LA PLATA MOUNTAINS, COLORADO - AN ALKALINE ROCK-HOSTED PORPHYRY COPPER-PRECIOUS METAL DEPOSIT: CANADIAN JOURNAL OF EARTH SCIENCES, V. 21, P. 630-641.}{Deposit:: ECKEL, E.B., 1938, COPPER ORES OF THE LA PLATA DISTRICT, COLORADO, AND THEIR PLATINUM CONTENT: COLORADO SCIENTIFIC SOCIETY PROCEEDINGS, V. 13, NO., 12, P. 647-664.}{Deposit:: PAGE, N.J, CLARK, A.L., DESBOROUGH, G.A., AND PARKER, R.L., 1973, PLATINUM-GROUP METALS, IN BROBST, D.A., AND PRATT, W.P., EDS., UNITED STATES MINERAL RESOURCES: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 820, P. 540.}{Production:: ECKEL, 1949}
Reporter	Hasler, J. William, Schwochow, Stephen D., Peterson, Jocelyn A., Blair, Will N.