Mine detail: Anna Lee Lode

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Location: Custer County, Colorado, United States, North America
Lat / long: 38.17612, -105.31001
dep_id: 10012882
mrds_id: D008875
Commodity type: metallic
Major mineral: Thorium, REE
Operation type: Surface
Production size: No production occurred
Development status: Prospect
ore: Thorite
gangue: Barite, Galena, Hematite, Limonite, Pyrite, Quartz
orebody_fm: TABULAR
model: 30: Thorium-rare-earth veins
alteration: Altered Syenite And Basic Dikes Appear To Be Related To Mineralization
ore_ctrl: Mineralized Veins; Narrow Syenite Dikes Parallel Mineralization
Reporter: Collins, Donna B.
hrock_unit: Hornblende-Plagioclase Gneiss And Alaskitic Granite Gneiss
hrock_type: Gneiss,Syenite
arock_unit: Biotite Granite
arock_type: Granite
Structure: Wet Mountains, Nw-Trending Shear Zones; Shearing Of Dikes
tectonic: Central Cordillera (Southern Rocky Mountains)
disc_yr: 1952
References:
  • Deposit:: CHRISTMAN, R.A., HEYMAN, A.M., DELLWIG, L.F, AND GOTT, G.B., 1953, THORIUM INVESTIGATIONS 1950-52, WET MOUNTAINS, COLORADO; USGS CIRCULAR 290, P.20-22
  • Deposit:: BROCK, M.R. AND SINGEWALD, 1968, GEOLOGIC MAP OF THE MOUNT TYNDALL QUADRANGLE, CUSTER COUNTY, COLORADO: USGS MAP GQ-596
  • Deposit:: NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULLETIN 40P. 119
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