Commodities
PrimarySilver, Gold
SecondaryCopper
TertiaryAntimony, Mercury, Zinc, Lead, Tellurium
Commodity typeM
Deposit
Deposit typeVein
Model85: Polymetallic veins
Deposit sizeS
WorkingsSurface/Underground
Orebody formTabular
Materials
Ore mineralsChalcopyrite, Cinnabar, Galena, Gold, Pyrite, Sphalerite, Tetrahedrite, Silver
GangueDickite, Quartz, Sericite
Geology
Host rockMudstone,Shale,Sandstone · Dolores Formation
Associated rockDiorite · Porphyritic Rocks--Diorite-Monzonite Porphyry
StructureLa Plata Dome, San Juan Uplift, Four Corners Platform
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationSilicification; Sericitization
Economic & production
Development statusPast Producer
First production1880
Last production1987
Identification
Deposit ID10014153
MRDS IDD010803
Alternate namesSilver Saddle Nos. 1-32, Shalkao Nos. 1-12, Hardway Smith Nos. 1-12, Road Runner Nos. 1-8, Margo No. 2,4,5, Unpatented Claims: Margo, Rebecca, MS 2382, Morning Star, MS 2381, North Star, MS 2380, Wray, MS 2379, Patented Claims: Martha, MS 1721, Egyptian Queen Mine, Beth Nos. 1-12, Threrese, Bessie G. Extension, Bessie G., MS 2055, Lady Douglass, MS 2378
RegionNA
Data scoreA
Coordinates37.4321, -108.00889
References
ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PL PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 73-76, 91-93.COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.BLM MINERAL SURVEYS MS 1721, 2055, 2378, 2379, 2380, 2381, 2382MINING RECORD, 9/7/83, 2/8/84Neubert, J.T., and others, 1992, Mineral appraisal of San Juan Naitonal forest, Colorado: U.S. Bureau of Mines Mineral Land Assessment Open-File Report MLA 2-92.CBM ANNUAL REPORT 1976U.S. Bureau of Mines, 1965, Mercury potential of the United States: U.S. Bureau of Mines Information Circular IC-8252, p. 376 p.ECKEL AND OTHERS, 1949, P. 91 (AS COMPILED FROM MINT, USBM, AND PRIVATE RECORDS); COLORADO DIV. MINES ANNUA. OPERATOR REPTS.