Commodities
PrimaryGold, Lead, Zinc, Silver
SecondaryMolybdenum, Copper
Deposit
Deposit typepolymetallic vein and replacement
Model72: Polymetallic replacement
Materials
Ore mineralsAnglesite, Galena, Cerussite, Gold, Covellite, Marcasite, Malachite, Pyrite, Smithsonite, Pyrrhotite, Silver, Sphalerite, Chalcopyrite
GangueLimonite, Wad
Geology
Host rockLimestone · Robinson, White Quail, and Jacque Mountain Members of the Minturn Formation
Associated rockMetasedimentary Rock,Granitoid,Mixed Clastic/Carbonate Rock,Clastic Sedimentary Rock · "granulite, banded gneiss, migmatite", "granitic rocks and pegmatite", "Minturn Formation", "Maroon Formation", "various quartz monzonite porphyry stocks, sills, and dikes"
StructureKokomo syncline, many small high-angle faults
Alterationwidespread silicification (jasperoid)
Economic & production
Development statusPast Producer
Identification
Deposit ID10108243
MRDS IDDC03563
Alternate namesTenmile District (or Tenmile Area), Robinson, McNulty
RegionNA
Data scoreB
Coordinates39.42499, -106.19089
References
SHARPS, 1963: CSM MIN. IND. BULL., VOL. 6, NO. 6CONSV. DIV. COMP. DATE, 8,65BERGENDAHL, M.H., AND KOSCHMANN, A.H., 1971, ORE DEPOSITS OF THE KOKOMO-TENMILE DISTRICT, COLORADO: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 652, 53 P.Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.Koschmann, A. H., and Wells, F. G., 1946, Preliminary report on the Kokomo mining district, Colorado: Colorado Scientific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.Dempsey, S., and Fell, J. E., 1986, Mining the summit-Colorado's Ten Mile district, 1860-1960: Norman, University of Oklahoma Press.Mach, C. J., 1992, Geology and mineral deposits of the Kokomo district, Colorado: Fort Collins, CO, Colorado State University, M.S. thesis, 154 p.Dunn, L.G, 2003, Colorado mining districts: A reference: Golden, Colo., Colorado School of Mines Library, 364 p.