The Alexite Manganese Mine is a manganese mine located in Gunnison county, Colorado at an elevation of 9,140 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: 9,140 Feet (2,786 Meters)
Commodity: Manganese
Lat, Long: 38.23444, -107.06444
Map: View on Google Maps
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Alexite Manganese Mine MRDS details
Site Name
Primary: Alexite Manganese Mine
Commodity
Primary: Manganese
Location
State: Colorado
County: Gunnison
District: White Earth (Powderhorn) District
Land Status
Land ownership: BLM Administrative Area
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
Not available
Ownership
Owner Name: Alexite Engineering Co.
Home Office: Colorado Springs, Co.
Years: 1944 -
Production
Year: 1943
Description: Ap_Grade: ^38% Mn
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1943
Year Last Production: 1943
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
Not available
Orebody
Not available
Structure
Type: R
Description: Gunnison Uplift, San Juan Volcanic Field
Type: L
Description: Iron Hill Alkalic Complex, Cimarron Fault, Powderhorn Stock, Unnamed Faults
Alterations
Alteration Type: L
Alteration Text: Oxidation Of Fe And Mn
Rocks
Name: Pyroxenite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cambrian
Analytical Data
Analytical Data: MUILENBURG (1919) CITES AVERAGE SAMPLE ASSAY OF 21.66% MN. 21.20% SIO2, 19.65% FE, 0.034% S, 0.147% P. ALEXITE'S STOCKPILED ORE CONTAINED 38% MN.
Materials
Ore: Wad
Gangue: Limonite
Gangue: Opal
Gangue: Jasper
Comments
Comment (Workings): 25-FT-DEEP SHAFT, TWO SHORT TUNNELS OF UNKNOWN EXTENT; OPEN CUTS
Comment (Production): PRESUMABLY 1943 WAS ONLY YEAR OF PRODUCTION. ORE WAS STOCKPILED AT SALIDA.
Comment (Deposit): OLSON (1974) DESCRIBES JASPER VEIN AS CONTAING FE AND MN STAINS AND OPAL IN CAVITIES AND FRACTURES. AT THIS SITE, JASPER LIES ON TWO INTERSECTING FAULTS (TRENDING N 22 W AND N 2 W) AT INFERRED FAULT CONTACT OF FINE- TO MEDIUM-GRAINED GRANITE ON WEST WITH PYROXENITE AND POWDERHORN GRANITE ON EAST. SEVERAL SMALL JASPER BODIES ON WEST WALL OF MORE NORTH-TRENDING FAULT TREND GENERALLY N 65 W. JASPER THOUGHT TO BE SILICEOUS SINTER OF HOT SPRING ORIGIN.
Comment (Location): ON NORTH SLOPE OF NE PROJECTION OF RUDOLPH HILL ABOUT 0.5 MILE SW OF ALEXITE'S POWDERHORN NO. 1 VERMICULITE MINE, 3.35 MILES SE OF POWDERHORN AND 1.4 MILES SW OF IRON HILL. ; INFO FROM LAND.ST :1976
References
Reference (Production): COLORADO DIV. MINES ANNUAL OPERATOR REPT. AND INF. REPT.
Reference (Deposit): OLSON, J.C., 1974, GEOLOGIC MAP OF THE RUDOLPH HILL QUADRANGLE, GUNNISON, HINSDALE, AND SAGUACHE COUNTIES, COLORADO: USGS MAP GQ-1177.
Reference (Deposit): MUILENBURG, G.A., 1919, MANGANESE DEPOSITS OF COLORADO: CGS BULL. 15, P. 38-40.
Reference (Deposit): COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.
Reference (Deposit): LA PLANTE, F.R., 1943, GUNNISON COUNTY ACTIVITIES: COLORADO MINING ASSOC. 1943 MINING YEARBOOK, P. 35-36. PROD
Colorado Mining Photos
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