Commodities
PrimarySilver
SecondaryCopper
Commodity typeM
Deposit
Deposit typeVein
Model85: Polymetallic veins
Deposit sizeS
Ore controlNw-Trending Fault Zone Cutting Gneiss
Materials
Ore mineralsPyrite
GangueCalcite, Limonite, Quartz
Geology
Host rockGneiss · Twilight Gneiss
Associated rockQuartz Monzonite,Granite
StructureSan Juan Uplift, Needle Mtns Uplift
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationFe Oxidation
Economic & production
Development statusPast Producer
Last production1925
Identification
Deposit ID10014198
MRDS IDD010865
RegionNA
Data scoreB
Coordinates37.61362, -107.74564
References
SCOTT, D.C., 1983, MINERAL INVESTIGATION OF THE WEST NEEDLE WILDERNESS SUTDY AREA AND THE BLM WEST NEEDLE CONTIGUOUS WILDERNESS STUDY AREA, LA PLATA AND SAN JUAN COUNTIES, COLORADO: USBM MLA 35-83, P. 6-7, 36-39.BARKER, FRED, 1969,PRECAMBRIAN GEOLOGY OF THE NEEDLE MOUNTAINS, SOUTHWESTERN COLORADO; USGS PROF. PAPER 644-A.CROSS, WHITMAN, AND OTHERS, 1905, DESCRIPTION OF THE NEEDLE MOUNTAINS QUADRANGLE, COLORADO; USGS FOLIO 131.