| Lat / long: | 39.68138, -105.32336 |
| Primary: | Feldspar, Beryllium, Mica |
| Secondary: | Niobium (Columbium), Tantalum |
| Tertiary: | Bismuth, REE, Uranium, Thorium, Lithium |
| Ore: | Allanite, Beryl, Columbite, Euxenite, Gadolinite, Microcline, Monazite, Muscovite, Pyrochlore, Tantalite, Xenotime |
| Gangue: | Biotite, Sericite, Topaz, Triphylite |
| Orebody form: | TABULAR |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| First production started: | 1942 |
| Last production ended: | 1944 |
| 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 |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| MRDS | D010198 |
| DEP | 10013739 |
| Reference | {Deposit:: HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 84}{Deposit:: OLSON, J.C., AND ADAMS, J.W., 1962, THORIUM AND RARE EARTHS IN THE UNITED STATES: USGS MAP MR-28}{Deposit:: BOOS, M.F., 1954, GENESIS OF PRECAMBRIAN PEGMATITES IN THE DENVER MOUNTAIN PARKS AREA, COLORADO: GSA BULL., V. 65, P. 115-142}{Deposit:: HEINRICH, E.W., 1947, BEYERITE FROM COLORADO: AM. MINERALOGIST, V. 32, NOS. 11-12, P. 660-669}{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 (FROM ORIGINAL CRIB RECORD)}{Production:: ORIGINAL CRIB RECORD (PROBABLY USBM REFERENCE)} |
| Reporter | Schwochow, Stephen D. |