The Manganese Hill Mine is a fluorine-fluorite mine located in Chaffee county, Colorado at an elevation of 7,598 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 7,598 Feet (2,316 Meters)
Commodity: Fluorine-Fluorite
Lat, Long: 38.64667, -106.07972
Map: View on Google Maps
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Manganese Hill Mine MRDS details
Site Name
Primary: Manganese Hill Mine
Secondary: Morgan Ranch Deposits
Secondary: Manganese
Secondary: U.S. Fluorspar Co. Mine
Secondary: Chaffee County Fluorspar Mine
Commodity
Primary: Fluorine-Fluorite
Tertiary: Manganese
Location
State: Colorado
County: Chaffee
District: Browns Canyon District
Land Status
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: U.S. Fluorspar And Manganese, Inc.
Years: 1969 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1936
Year Last Production: 1950
Discovery Year: 1923
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Fluorspar deposits (fluorite veins)
Orebody
Not available
Structure
Type: R
Description: Southern Mosquito Range, Arkansas Valley Graben
Type: L
Description: Folds, Faults; N-Trending Fault Bounding Arkansas Valley
Alterations
Alteration Type: L
Alteration Text: Silicification, Fluoritization
Rocks
Name: Gneiss
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic
Analytical Data
Analytical Data: AVERAGE FOR DEPOSIT 20% CAF2
Analytical Data: LENSES TO 56% CAF2
Materials
Ore: Fluorite
Gangue: Manganite
Gangue: Pyrite
Gangue: Opal
Gangue: Hematite
Gangue: Kaolinite
Gangue: Barite
Gangue: Quartz
Gangue: Psilomelane
Gangue: Pyrolusite
Gangue: Calcite
Gangue: Montmorillonite
Gangue: Goethite
Comments
Comment (Reserve-Resource): THESE RESERVES/RESOURCES ARE IN COMBINATION WITH THE MANGANESE HILL MINE
Comment (Deposit): ORE OCCURS AS LENSES AND VEINLETS TO 6 IN THICK IN SHEETED ZONES
Comment (Development): MILL WITH ABOUT 100 TPD CAPACITY OPERATING IN 1950
Comment (Geology): GEOL.DESC: VEINS UP TO 4 TO 5 FT. WIDE, STRIKE N 20E, IN GRANITE. (ARGALL)
Comment (Geology): GEOL.DESC: SOURCE: MESOTHERMAL SPRINGS. 3 TYPES FLUORSPAR OCCURANCES ARE COMMON: 1) LENSES OF BOTRYOIDAL & MASSIVE FLUORSPAR WITH LARGE VUGS, 2) WAVY RIBBON-LIKE LAYERED STRUCTURES OF FLUORSPAR ALONG OPEN FISSURES, 3) SMALL VEINLETS. TWO MAIN STRUCTURES: CHIMNEY HILL VEIN (N50W) AND BANCROFT #1 VEIN (N70E-NEARLY VERTICAL).
Comment (Location): NE OF HECLA JUNCTION, EAST OF US HWY 285, WEST OF ARKANSAS RIVER; NE/4 SEC. 28, T 51 N, R 8 E, ABOUT 650 FT. NORTH OF CHIMNEY HILL MINE. INFO FROM LAND.ST :(1976)
Comment (Production): SEVERAL THOUSAND TONS OF FLUORSPAR PRODUCED FROM MANGANESE HILL AND CHIMNEY HILL MINES.
Comment (Reserve-Resource): Diamond drilling at the Chimney Hill and Manganese Hill area indicated more than 1 million tons of fluorspar material that contains about 20% CaF2. (Van Alstine)
Comment (Workings): SHAFTS, WINZES, INCLINES, ADITS, PITS, TRENCHES; MAJOR DEVELOPMENT IN 3 INCLINES DRIVEN EAST FROM SAME PORTAL AT ANGLES OF ABOUT 10 DEG, 20 DEG, 30 DEG
References
Reference (Deposit): USGS TOPO MAPS, ARKANSAS RIVER SURVEY, 1955, 1: 24,000, 1961
Reference (Deposit): DMEA RECORDS
Reference (Deposit): USBM MINERAL EXAM. FILE
Reference (Reserve-Resource): VAN ALSTINE, R. E. (1969)
Reference (Deposit): COLO BOM AN RPT 1941, 1956
Reference (Deposit): MINE MAP REPO # 404949
Reference (Deposit): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
Reference (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
Reference (Deposit): BRADY, B. T., 1975, MAP SHOWING FLUORSPAR DEPOSITS IN COLORADO: USGS MAP MR-70, 1:500,000, TEXT
Reference (Deposit): ARGALL, 1949, COLO. SCH. MINES QUART., V. 44, NO. 2
Reference (Deposit): CONSV. DIV. COMP. DATE, 1,64
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.
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