| Lat / long: | 39.66666, -105.30308 |
| Primary: | Mica, Feldspar |
| Secondary: | Beryllium, Niobium (Columbium), Tantalum |
| Tertiary: | REE, Thorium |
| Ore: | Bertrandite, Beryl, Cleavelandite, Columbite, Microcline, Microlite, Monazite, Thorite |
| Gangue: | Garnet, Topaz |
| Orebody form: | TABULAR |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| First production started: | 1945 |
| Last production ended: | 1956 |
| Host rock: | Idaho Springs Formation---Interlayered Hornblende Gneiss, Calc-Silicate Gneiss, And Amphibolite |
| Host type: | Gneiss |
| Associated rock: | Pegmatite |
| Associated type: | Pegmatite |
| Structure: | Front Range Uplift, Denver Basin, Floyd Hill Fault Zone, Unnamed Overturned Anticline |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| MRDS | D010196 |
| DEP | 10013737 |
| Reference | {Deposit:: BOOS, M.F., 1954, GENESIS OF PRECAMBRIAN PEGMATITES IN THE DENVER MOUNTAIN PARKS AREA, COLORADO: GSA BULL., V. 65, P. 115-142}{Deposit:: SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A}{Deposit:: MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 29.}{Deposit:: USBM MIN. EXAM. FILE, REPT. OF 6/1/59 (FROM ORIGINAL CRIB RECORD)}{Production:: ORIGINAL CRIB RECORD (PROBABLY USBM REFERENCE)} |
| Reporter | Schwochow, Stephen D. |