Mine detail: Kokomo District

Previously called 'McNultyRobinsonTenmile District (or Tenmile Area)'

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Location

Lat / long:

39.42499, -106.19089

Resource(M)

Primary:	Gold, Lead, Silver, Zinc
Secondary:	Molybdenum, Copper
Ore:	Anglesite, Galena, Cerussite, Gold, Covellite, Marcasite, Malachite, Pyrite, Smithsonite, Pyrrhotite, Silver, Sphalerite, Chalcopyrite
Gangue:	Limonite, Wad

Production

Operation type:	Surface-Underground
Deposit type:	polymetallic vein and replacement
Development status:	Past Producer

Geology

Host rock:	Robinson, White Quail, and Jacque Mountain Members of the Minturn Formation
Host type:	Limestone
Associated rock:	granulite, banded gneiss, migmatite, granitic rocks and pegmatite, Minturn Formation, Maroon Formation, various quartz monzonite porphyry stocks, sills, and dikes
Associated type:	Metasedimentary Rock,Granitoid,Mixed Clastic/Carbonate Rock,Clastic Sedimentary Rock
Structure:	Kokomo syncline, many small high-angle faults
Alteration processes:	widespread silicification (jasperoid)

References

MRDS	DC03563
DEP	10108243
Reference	{Deposit:: SHARPS, 1963: CSM MIN. IND. BULL., VOL. 6, NO. 6}{Deposit:: CONSV. DIV. COMP. DATE, 8,65}{Deposit:: BERGENDAHL, M.H., AND KOSCHMANN, A.H., 1971, ORE DEPOSITS OF THE KOKOMO-TENMILE DISTRICT, COLORADO: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 652, 53 P.}{Deposit:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}{Deposit:: Koschmann, A. H., and Wells, F. G., 1946, Preliminary report on the Kokomo mining district, Colorado: Colorado Scientific Society Proceedings, v. 15, no. 2, p. 51-112.}{Deposit:: Dempsey, S., and Fell, J. E., 1986, Mining the summit-Colorad * Ten Mile district, 1860-1960: Norman, University of Oklahoma Press.}{Deposit:: Mach, C. J., 1992, Geology and mineral deposits of the Kokomo district, Colorado: Fort Collins, CO, Colorado State University, M.S. thesis, 154 p.}{Names:: Dunn, L.G, 2003, Colorado mining districts: A reference: Golden, Colo., Colorado School of Mines Library, 364 p.}
Reporter	Beach, Richard A., Wilson, Anna B.