Mine detail: Browns Canyon District

Previously called 'Mines and deposits include: Colorado-American, Delay Adit, Lloyd Shaft, Chimney Hill, Manganese HillBrowns Canyon Fluorspar Area'

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Location

Lat / long: 38.64722, -106.0756

Resource(B)

Primary: Fluorine-Fluorite
Tertiary: Manganese
Ore: Fluorite
Gangue: Barite, Calcite, Goethite, Hematite, Kaolinite, Manganite, Montmorillonite, Opal, Psilomelane, Pyrite, Pyrolusite, Quartz
Orebody form: TABULAR, LENTICULAR
Discovery year: 1923

Production

Operation type: Unknown
Production size: Medium
Development status: Past Producer
First production started: 1927
Last production ended: 1949

Geology

Host rock:Banded Gneiss
Host type:Gneiss,Rhyolite
Associated rock:Gneissic Quartz Monzonite;Ash-Flow Tuff
Associated type:Gneiss,Rhyolite
Structure:Southern Mosquito Range, Arkansas Valley Graben, Folds, Faults; N-Trending Fault Bounding Arkansas Valley
Tectonic:Central Cordillera (Southern Rocky Mountains)
Alteration processes:Silicification, Fluoritization

References

MRDSD010255
DEP10013778
Reference{Deposit:: VAN ALSTINE, R.E., 1969, GEOLOGY AND MINERAL DEPOSITS OF THE PONCHA SPRINGS NE QUADRANGLE, CHAFFEE COUNTY, COLORADO: USGS PROFESSIONAL PAPER 626, 52 P.}{Deposit:: 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. 38-43}{Deposit:: BRADY, B.T., 1975, MAP SHOWING FLUORSPAR DEPOSITS IN COLORADO: USGS MAP MR. 70, 1:500,000, TEXT}{Deposit:: Vanderwilt, J.W., 1947, Mineral resources of Colorado: State of Colorado Mineral Resources Board, 547 p.}{Deposit:: Argall, G. O., Jr., 1949, Industrial minerals of Colorado: Colorado School of Mines Quarterly, v. 44, no. 2, 477 p.}{Deposit:: 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 IN-HOUSE MINERAL PROPERTY FILES (NOS.25.8-25.13, 25.15, AND 25.35) CONTAINING PROPRIETARY AND UNPUBLISHED INFORMATION RELATING TO MINING PROPERTIES WITHIN THE BROWNS CANYON FLUORSPAR DISTRICT.}{Deposit:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}{Development:: COLORADO MINING ASSOCIATION, 1944 MINING YEAR BOOK: DENVER, PP. 28-31; 1946 MINING YEAR BOOK.PP. 43-47.}{Production:: VAN ALSTINE, R.E., (1969)}{Reserve-Resource:: VAN ALSTINE, R.E. (1969)}
ReporterCollins, Donna B., Osmonson, Beach, Richard A.