REF: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:: USBM MIN. EXAM. FILE, REPT. OF 2/2/59 (FROM O
Commodities (Major) - Mica, Quartz, Feldspar; (Minor) - REE
Development Status: Occurrence
Host Rock Unit: Idaho Springs Formation---Feldspar-Rich Gneiss
Structure: Front Range Uplift, Denver Basin, Hurricane Hill Fault System, Unnamed Syncline, Idaho Springs-Ralston Shear Zone
Host Rock: Gneiss
Tectonic Structure: Central Cordillera (Southern Ricky Mtns)
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Map Reference: 39°50'34"N , 105°22'20"W
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Mineral List: |
Biotite  | | | | Reference: | [Minerals of Colorado (1997) Eckels, E. B.] |
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Fluorite
var: Yttrofluorite | | (Ca | | Y | | )F | | where 0.05< x <0.3 |
| | | Reference: | [Minerals of Colorado (1997) Eckels, E. B.] |
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Microcline | | | | Reference: | [U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.] |
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Muscovite | | | | Reference: | [U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.] |
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Quartz | | | | Reference: | [U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.] |
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5 entries listed. 3 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
