Description
Colorado Fluorspar Mines, Inc.; American Fluorspar Corp.; U.S. Fluorspar & Manganese, Inc.; Commercial Minerals, Inc.
Commodities
PrimaryFluorine-Fluorite
TertiaryManganese
Commodity typeB
Deposit
Model174: Fluorspar deposits (fluorite veins)
Deposit sizeM
WorkingsSurface/Underground
Orebody formTABULAR, LENTICULAR
Ore controlFault Breccia; Fault Zone Striking N 30-50 W Dipping 65-85 Sw; Fractures
Materials
Ore mineralsFluorite
GangueBarite, Calcite, Goethite, Hematite, Kaolinite, Manganite, Montmorillonite, Opal, Psilomelane, Pyrite, Pyrolusite, Quartz
Geology
Host rockGneiss,Rhyolite · Banded Gneiss
Associated rockGneiss,Rhyolite · Gneissic Quartz Monzonite;Ash-Flow Tuff
StructureSouthern Mosquito Range, Arkansas Valley Graben, Folds, Faults; N-Trending Fault Bounding Arkansas Valley
Tectonic settingCentral Cordillera (Southern Rocky Mountains)
AlterationSilicification, Fluoritization
Economic & production
Development statusPast Producer
First production1927
Last production1949
Discovery year1923
Identification
Deposit ID10013778
MRDS IDD010255
Alternate namesMines and deposits include: Colorado-American, Delay Adit, Lloyd Shaft, Chimney Hill, Manganese Hill, Browns Canyon Fluorspar Area
RegionNA
Data scoreA
Coordinates38.64722, -106.0756
References
VAN ALSTINE, R.E., 1969, GEOLOGY AND MINERAL DEPOSITS OF THE PONCHA SPRINGS NE QUADRANGLE, CHAFFEE COUNTY, COLORADO: USGS PROFESSIONAL PAPER 626, 52 P.VAN ALSTINE, R.E. AND COX, D.C., 1969, FLUORSPAR MINES AND PROSPECTS, IN, GEOLOGY AND MINERAL DEPOSITS OF THE PONCHA SPRINGS NE QUADRANGLE, CHAFFEE COUNTY, COLORADO: USGS PROFESSIONAL PAPER 626, P. 38-43BRADY, B.T., 1975, MAP SHOWING FLUORSPAR DEPOSITS IN COLORADO: USGS MAP MR. 70, 1:500,000, TEXTVanderwilt, J.W., 1947, Mineral resources of Colorado: State of Colorado Mineral Resources Board, 547 p.Argall, G. O., Jr., 1949, Industrial minerals of Colorado: Colorado School of Mines Quarterly, v. 44, no. 2, 477 p.U.S. BUREAU OF MINES. IN-HOUSE MINERAL PROPERTY FILES (NOS.25.8-25.13, 25.15, AND 25.35) CONTAINING PROPRIETARY AND UNPUBLISHED INFORMATION RELATING TO MINING PROPERTIES WITHIN THE BROWNS CANYON FLUORSPAR DISTRICT.Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.COLORADO MINING ASSOCIATION, 1944 MINING YEAR BOOK: DENVER, PP. 28-31; 1946 MINING YEAR BOOK.PP. 43-47.VAN ALSTINE, R.E., (1969)VAN ALSTINE, R.E. (1969)