Location: | Jefferson County, Colorado, United States, North America |
Lat / long: | 39.70027, -105.37308 |
dep_id: | 10013732 |
mrds_id: | D010190 |
Commodity type: | metallic and nonmetallic |
Major mineral: | Feldspar, Mica |
Trace mineral: | REE |
Operation type: | Unknown |
Production size: | Small ammount of material produced |
Development status: | Past Producer |
ore: | Albite, Cleavelandite, Microcline |
gangue: | Allanite, Garnet, Magnetite, Muscovite, Quartz |
orebody_fm: | LENTICULAR |
Reporter: | Schwochow, Stephen D. |
hrock_unit: | Idaho Springs Formation---Interlayered Hornblende Gneiss, Calc-Silicate Gneiss, And Amphibolite;Pegmatite |
hrock_type: | Gneiss |
arock_unit: | Pegmatite |
arock_type: | Pegmatite |
Structure: | Front Range Uplift, Denver Basin, Floyd Hill Fault Zone, Unnamed Overturned Anticline |
tectonic: | Central Cordillera (Southern Rocky Mtns) |
Year first produced: | 1935 |
yr_lst_prd: | 1949 |
References: |
- 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. 27.
- Deposit:: BOOS, M.F., 1954, GENESIS OF PRECAMBRIAN GRANITIC PEGMATITES IN THE DENVER MOUNTAIN PARKS AREA, COLORADO: GSA BULL., V. 65, NO. 2, P. 115-142.
- Deposit:: USBM MIN. EXAM. FILE, REPT. OF 6/29/59 (FROM ORIGINAL CRIB RECORD)
- Production:: ORIGINAL CRIB RECORD (PROBABLY USBM REFERENCE)
|