Commodities
PrimarySilver, Copper
SecondaryPlatinum, Gold, Palladium
Commodity typeM
Deposit
Deposit sizeS
WorkingsSurface/Underground
Orebody formPOD, VEINS, DISSEMINATED GRAINS
Ore controlDeposit Is Near Border Of Syenite Stock. Intense Late-Stage Fracturing And Metamorphosed Clastic Rocks Near Intrusion.
Materials
Ore mineralsBornite, Chalcocite, Enargite, Galena, Hematite, Magnetite, Malachite, Marcasite, Pyrite, Sphalerite
GangueAnkerite, Apatite, Calcite, Fluorite, Garnet, Limonite, Quartz, Sanidine
Geology
Host rockMudstone,Shale,Sandstone · Cutler Formation
Associated rockSyenite · Granitic Rocks;Allard Stock
StructureShort Discontinuous Faults Of Small Displacement, Intense Late-Stage Fracturing. La Plata Dome >15 Mi Diameter, San Juan Uplift. Four Corners Platform. Northeast-Trending Fracture Zone
Tectonic settingCentral Cordillera (Southern Rocky Mountains)
AlterationExtreme Potassic Metasomatism, Sericitized And Felspathized Porphyry. Fe Oxidation, Oxidation Of Cu Sulfide
Economic & production
Development statusPast Producer
Production years1911-1914, 1917
First production1911
Last production1917
Discovery year1902
Identification
Deposit ID10087912
MRDS IDD010812
Alternate namesDelaware Claims, Gold Eagle, Copper Hill Tunnel #1
RegionNA
Data scoreB
Coordinates37.40028, -108.07278
References
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.MERTIE, J.B., JR., 1969, ECONOMIC GEOLOGY OF THE PLATINUM METALS: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, P. 95.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.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.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.BOM OPENFILE RPT MLA 2-92ECKEL, 1949