Colorado · Boulder County
Past Producer

Grand Island-Caribou District

Boulder County, Colorado, United States
GoldLeadSilverCopperZincTitaniumUranium
⌖ Show on mapUSGS source ↗
Commodities
PrimaryGold, Lead, Silver
SecondaryCopper, Zinc
TertiaryTitanium, Uranium
Deposit
Model85: Polymetallic veins
Materials
Ore mineralsArgentite, Chalcopyrite, Galena, Pyrargyrite, Silver, Sphalerite, Titaniferous Magnetitite, Pitchblende, Cerargyrite
GanguePyrite, Quartz
Geology
Host rockMonzogabbro · Caribou stock
Associated rockSchist,Gneiss,Granitoid · "Idaho Springs Formation", "Boulder Creek Granite"
Structureore shoots localized at vein junctions and by changes in dip or strike
Alterationsilicified, pyritized, argillized, and chloritized wall rock
Economic & production
Development statusPast Producer
Identification
Deposit ID10141356
Alternate namesCaribou , Cardinal, Eldora , Nederland , Grand Island
RegionNA
Data scoreB
Coordinates39.9811, -105.57892
References
Moore, F. B., Cavender, W. S., and Kaiser, E. P., 1957, Geology and uranium deposits of the Caribou area, Boulder County, Colorado: U.S. Geological Survey Bulletin 1030-N, pp. 517-552.Harrer, C.M., and Tesch, W.J., Jr., 1959, Reconnaissance of iron occurrences in Colorado, U.S. Bureau of Mines Information circular 7918, 82 p.MINE MAP REPO # 409114Vanderwilt, J.W., 1947, Mineral resources of Colorado: State of Colorado Mineral Resources Board, 547 p.Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.Smith, D. A., 2003, Silver saga, the story of Caribou, Colorado (rev. ed.): Boulder, University Press of Colorado, 230 p.Lovering, T. S., and Goddard, E. N., 1950, Geology and Ore Deposits of the Front Range, Colorado: U.S. Geological Survey Professional Paper 223, 319 p.Dunn, L.G, 2003, Colorado mining districts: A reference: Golden, Colo., Colorado School of Mines Library, 364 p.Calais Resources corporate info., accessed from internet on 12/20/2005.