Mine detail: Brandt Beryl-Topaz Prospect

Previously called 'Beaver Brook Pegmatite'

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Location: Clear Creek County, Colorado, United States, North America
Lat / long: 39.70943, -105.39976
dep_id: 10013762
mrds_id: D010226
Commodity type: metallic
Major mineral: Beryllium
Operation type: Unknown
Production size: No production occurred
Development status: Occurrence
ore: Beryl
gangue: Topaz
orebody_fm: TABULAR
Reporter: Schwochow, Stephen D.
hrock_unit: Idaho Springs Formation---Feldspar-Rich Gneiss Interlayered With Hornblende Gneiss
hrock_type: Gneiss
arock_unit: Pegmatite
arock_type: Pegmatite
Structure: Front Range Uplift, Denver Basin, Floyd Hill Fault Zone
tectonic: Central Cordillera (Southern Rocky Mtns)
References:
  • Deposit:: HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 30
  • Deposit:: SHERIDAN, D.M., AND MARSH, S.P., 1976, GEOLOGIC MAP OF THE SQUAW PASS QUADRANGLE, CLEAR CREEK, JEFFERSON, AND GILPIN COUNTIES, COLORADO: USGS MAP GQ-1337
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