Commodities
PrimarySilver
TertiaryCopper, Lead, Zinc, Gold
Commodity typeM
Deposit
Deposit typeVein
Model85: Polymetallic veins
Deposit sizeS
Ore controlNw-Se And Wnw-Ese-Trending Faults And Fractures
Materials
Ore mineralsChalcopyrite, Galena, Pyrite, Sphalerite
GangueCalcite, Hematite, Limonite, Quartz
Geology
Host rockGneiss,Limestone · Twilight Gneiss;Ouray And Leadville Limestones
Associated rockMonzonite,Gabbro,Trachyte · Electra Lake Gabbro;Monzonite Porphyry And Quartz Trachyte
StructureSan Juan Uplift, Needle Mtns Uplift, Unnamed Faults
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationFe Oxides; Cu Carbonates; Silicification
Economic & production
Development statusPast Producer
Last production1925
Discovery year1883
Identification
Deposit ID10101876
MRDS IDD010866
Alternate namesPatented Claims: Bank, MS 1778, Castle Rock Srpings, MS 1778, Sarah G., MS 20762
RegionNA
Data scoreB
Coordinates37.59751, -107.7762
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 JUAN COUNTIES, COLORADO: USBM MLA 35-83.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.HENDERSON, C.W., 1926, MINING IN COLORADO, A HISTORY OF DISCOVERY, DEVELOPMENT, AND PRODUCTION: USGS PROF. PAPER 138. P. 177-178.BURCHARD, H.C., 1884, COLORADO--LA PLATA COUNTY, IN REPORT OF THE DIRECTOR OF THE MINT, UPON THE PRODUCTION OF PRECIOUS METALS IN THE UNITED STATES DURING THE CALENDAR YEAR 1883: GPO, P. 368-376.BLM MINERAL SURVEYS MS 1778, 1779, 20762.STEVEN, T.A., AND OTHERS, 1974, GEOLOGIC MAP OF THE DURANGO QUADRANGLE, SOUTHWESTERN COLORADO: USGS MAP I-764.COLORADO DIV. MINES INF. REPT.