Mine detail: Hilltop No. 23 Mine

Previously called 'Hilltop Group'

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Location: Larimer County, Colorado, United States, North America
Lat / long: 40.50637, -105.34392
dep_id: 10087856
mrds_id: D010327
Commodity type: metallic
Major mineral: Beryllium
Trace mineral: Uranium
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Beryl
Reporter: Schwochow, Stephen D.
hrock_unit: Metasedimentary Rocks-Mica Schist;Pegmatite
hrock_type: Mica Schist
arock_unit: Pegmatite;Tonalite (Quartz Diorite)
arock_type: Tonalite,Pegmatite
Structure: Front Range Uplift, Thompson Canyon Fault, Mt Olympus Batholith, Ne-Trending Folds
tectonic: Central Cordillera (Southern Rocky Mtns)
yr_lst_prd: 1958
References:
  • Deposit:: THURSTON, W.R., 1955, PEGMATITES OF THE CRYSTAL MOUNTAIN DISTRICT, LARIMER COUNTY, COLORADO: USGS BULL. 1011, 185 P., 13 PLS.
  • Deposit:: MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BERING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 30.
  • Deposit:: COLORADO DIV. MINES INF. REPT.
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