Mine detail: Alexite Manganese Mine

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Location: Gunnison County, Colorado, United States, North America
Lat / long: 38.23444, -107.06506
dep_id: 10014561
mrds_id: D011386
Commodity type: metallic
Major mineral: Manganese
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Wad
gangue: Jasper, Limonite, Opal
alteration: Oxidation Of Fe And Mn
ore_ctrl: Extinct Hot Springs At Fault Intersection
Reporter: Schwochow, Stephen D.
hrock_type: Pyroxenite,Granite
arock_unit: Jasper;Pyroxenite;Fine-To Medium-Grained Granite;Powderhorn Granite
arock_type: Pyroxenite,Granite
Structure: Gunnison Uplift, San Juan Volcanic Field, Iron Hill Alkalic Complex, Cimarron Fault, Powderhorn Stock, Unnamed Faults
tectonic: Central Cordillera (Southern Rocky Mtns)
Year first produced: 1943
yr_lst_prd: 1943
References:
  • Deposit:: OLSON, J.C., 1974, GEOLOGIC MAP OF THE RUDOLPH HILL QUADRANGLE, GUNNISON, HINSDALE, AND SAGUACHE COUNTIES, COLORADO: USGS MAP GQ-1177.
  • Deposit:: MUILENBURG, G.A., 1919, MANGANESE DEPOSITS OF COLORADO: CGS BULL. 15, P. 38-40.
  • Deposit:: COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.
  • Deposit:: LA PLANTE, F.R., 1943, GUNNISON COUNTY ACTIVITIES: COLORADO MINING ASSOC. 1943 MINING YEARBOOK, P. 35-36. PROD
  • Production:: COLORADO DIV. MINES ANNUAL OPERATOR REPT. AND INF. REPT.
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