Mine detail: Cotopaxi District

Previously called ''

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Location

Lat / long: 38.38195, -105.6953

Resource(M)

Primary: Zinc, Copper
Secondary: Lead, Gold, Silver
Ore: Chalcopyrite, Gahnite, Galena, Gold, Silver, Sphalerite
Gangue: Biotite, Garnet, Gypsum, Hornblende, Quartz
Orebody form: LENSOID
Discovery year: 1875

Production

Operation type: Unknown
Production size: Small
Development status: Past Producer
First production started: 1850
Last production ended: 1945

Geology

Host rock:Migmatitic Gneiss
Host type:Gneiss,Skarn (Tactite)
Associated rock:Granodiorite Of Boulder Creek Age
Associated type:Diorite
Structure:Thirtynine Mile Volcanic Field, Wet Mountains, Cotopaxi Fault
Tectonic:Central Colorado (Southern Rocky Mountains)

References

MRDSD009484
DEP10101797
Reference{Deposit:: VANDERWILT, J.W., 1947, MINERAL RESOURCES OF COLORADO: COLORADO MINERAL RESOURCES BOARD, P. 83-85.}{Deposit:: TAYLOR, R.B., SCOTT, G.R., WOBUS, R.A., EPIS, R.C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE COTOPAXI 15-MINUTE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP T-900, 1:62,500.}{Deposit:: LINDGREN, WALDEMAR, 19078 NOTES ON COPPER DEPOSITS IN CHAFFEE, FREMONT, AND JEFFERSON COUNTIES, COLORADO: USGS BULLETIN 340, P. 157-174.}{Deposit:: HEINRICH, E.W., 1981, PRECAMBRIAN TUNGSTEN AND COPPER-ZINC SKARN DEPOSITS OF SOUTH-CENTRAL COLORADO: CGS RESOURCE SERIES 21, P. 30, 83-88}{Deposit:: HARRER, C.M. AND TESCH, W.J., JR., 1959, RECONNAISSANCE OF IRON OCCURRENCES IN COLORADO: USBM IC 7918, 82 P.}{Deposit:: Sheridan, D.M., and Raymond, W.H., 1984, Precambrian deposits of zinc-copper-lead sulfides and zinc spinel (gahnite) in Colorado: U.S. Geological Survey Bulletin 1550, 31 p.}{Deposit:: Sheridan, D.M., Raymond, W.H., Taylor, R.B., and Hasler, J.W., 1990, Metallogenic map of stratabound exhalative and related occurrences in Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1971, scale 1:1,000,000.}{Geology:: Heimann, Adriana, 2002, The composition of zinc-rich spinels associated with metamorphosed massive sulfide deposits - a reexamination: Society of Economic Geologists Abstracts, 2002 Denver Annual Meeting.}{Production:: VANDERWILT, J.W., 1947, P. 84}
ReporterCollins, Donna B., Keller, John W.