| Location: | Jefferson County, Colorado, United States, North America |
| Lat / long: | 39.79638, -105.27114 |
| dep_id: | 10013736 |
| mrds_id: | D010194 |
| Commodity type: | metallic and nonmetallic |
| Major mineral: | Mica, Beryllium |
| Trace mineral: | Quartz, Feldspar |
| Operation type: | Unknown |
| Production size: | Small ammount of material produced |
| Development status: | Past Producer |
| ore: | Beryl, Muscovite, Quartz |
| orebody_fm: | TABULAR |
| Reporter: | Schwochow, Stephen D., Spanski, Gregory T. |
| hrock_unit: | Idaho Springs Formation---Plagioclase-Quartz-Biotite Gneiss And Plagioclase-Hornblende Gneiss, And Amphibolite;Pegmatite |
| hrock_type: | Gneiss,Amphibolite |
| arock_unit: | Pegmatite |
| arock_type: | Pegmatite |
| Structure: | Front Range Uplift, Denver Basin, Junction Ranch Fault Zone |
| tectonic: | Central Cordillera (Southern Rocky Mtns) |
| References: |
- Deposit:: SHERIDAN, D.M., AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF THE RALSTON BUTTES DISTRICT, JEFFERSON COUNTY, COLORADO: USGS PROF. PAPER 520 (INCL. GEOLOGIC MAP OF RALSTON BUTTES QUAD)
- Deposit:: MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 28
- Deposit:: USBM MIN. EXAM. FILE, REPT. OF 1/26/59 (FROM ORIGINAL CRIB RECORD)
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