Commodities
PrimaryFluorine-Fluorite, Gold
SecondaryUranium, Copper, Lead, Silver
TertiaryTungsten, Molybdenum, Tellurium
Commodity typeB
Deposit
Model84: Alkaline Au-Te (Au-Ag-Te veins)
Materials
Ore mineralsGold, Fluorite, Telluride, Pyrite, Galena, Tetrahedrite
GangueQuartz
Geology
Host rockMica Schist,Mafic Gneiss,Granite,Granodiorite · "Idaho Springs Formation", "Swandyke hornblends gneiss", "Boulder Creek , Overland Mountain, and Silver Plume granites"
Associated rockAlkali-Granite (Alaskite) · sodic granite-quartz monzonite porphyry of Porphyry Mtn
Structurethrough-going NW-trending faults
Alterationsericitic and silicified wall rocks
Economic & production
Development statusPast Producer
Identification
Deposit ID10008720
MRDS IDD001069
Alternate namesJimtown, Central
RegionNA
Data scoreB
Coordinates40.12722, -105.3875
References
Nelson-Moore, J.L., Collins, D.B., and Hornbaker, A.L., 1978, Radioactive mineral occurrences of Colorado: Colorado Geological Survey Bulletin 40, 1054 p., 12 pl.LEMMON, D.M. AND TWETO, O.L., 1962, TUNGSTEN IN THE U.S., USGS MAP, MR-25Goddard, E. N., 1946, Fluorspar Deposits of the Jamestown District, Boulder County, Colorado: Colorado Scientific Society Proceedings, v. 15, no.1, 47 p.Vanderwilt, J.W., 1947, Mineral resources of Colorado: State of Colorado Mineral Resources Board, 547 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.Brady, B. T., 1975, Map showing fluorspar deposits in Colorado: U.S. Geological Survey Mineral Investigations Resources Map MR-70.Koschmann, A. H., and Bergendahl, M. H., 1968, Principal gold-producing districts of the United States: U.S. Geological Survey Professional Paper 610, 283 p.Sunshine Mining Co. Colorado exploration files, file ID 14, Boulder County, Jamestown project, unpublished data, available at Colorado Geological Survey.