Commodities
PrimarySilver
TertiaryCopper
Commodity typeM
Deposit
Deposit typeVein
Model85: Polymetallic veins
Deposit sizeS
Materials
Ore mineralsPyrite
GangueLimonite, Quartz
Geology
Host rockGneiss · Twilight Gneiss
StructureSan Juan Uplift, Needle Mtns Uplift
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationFe Oxidation
Economic & production
Development statusPast Producer
Last production1925
Identification
Deposit ID10014200
MRDS IDD010869
RegionNA
Data scoreB
Coordinates37.61029, -107.77758
References
SCOTT, D.C., 1983, MINERAL INVESTIGATION OF THE WEST NEEDLE WILDERNESS STUDY AREA AND THE BLM WEST NEEDLE CONTIGUOUS WILDERNESS STUDY AREA, LA PLATA AND SAN JUA COUNTIES, COLORADO: USBM MLA 35-83, P. 7, 19.BARKER, FRED, 1969, PRECAMBRIAN GEOLOGY OF THE NEEDLE MOUNTAINS, SOUTHWESTERN COLORADO: USGS PROF. PAPER 644-A.CROSS, WHITMAN, AND HOLE, A.D., 1910, DESCRIPTION OF THE ENGINEER MOUNTAIN QUADRANGLE: USGS FOLIO 171.