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Biotite from
Green Mountain Mine (Copper Boy Mine), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA


Locality type:Mine
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Green Mountain Mine (Copper Boy Mine), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:736994
Long-form Identifier:1:3:736994:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.3km (2.0 miles) ⓘIron Mountain, Iron Mountain complex, Fremont County, Colorado, USA
4.0km (2.5 miles) ⓘGood News No. 1 Property (Goat Park; Good News Complex), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
4.1km (2.6 miles) ⓘIron Mountain Mine (Iron Mountain Deposit; Iron Mountain Titaniferous Magnetite Deposit), McClure Mountain Complex, Fremont County, Colorado, USA
4.4km (2.7 miles) ⓘGood News No. 2 Claims (Goat Park), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
4.8km (3.0 miles) ⓘEl Plomo Mine, Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
6.1km (3.8 miles) ⓘHorseshoe Mine (School Section Deposit), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
6.4km (4.0 miles) ⓘMcClure Gulch carbonatite, McClure Mountain Complex, Fremont County, Colorado, USA
6.7km (4.2 miles) ⓘJoker Mine (Rocky Mountain Boy Claims Patented Claims), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
8.1km (5.0 miles) ⓘDawson Gold project, Fremont County, Colorado, USA
8.9km (5.5 miles) ⓘDawson Mountain - Surprise Group (Unpatented Claims: Sam 1-15 1977 Part; Copper Boy 1902), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
References
(2005). The Canadian Mineralogist 43, 601-622.
Spry, Paul G.; McFadden, Scott; Teale, Graham S.; Alers, Brian; Shallow, John M.; Glenn, Justin M. (2022) Nodular sillimanite rocks as field indicators to metamorphosed massive sulfide deposits. Ore Geology Reviews, 141. 104632 doi:10.1016/j.oregeorev.2021.104632
Berke, Edward H., Spry, Paul G., Heimann, Adriana, Teale, Graham S., Johnson, Benjamin, von der Handt, Anette, Alers, Brian, Shallow, John M. (2023) The genesis of metamorphosed Paleoproterozoic massive sulphide occurrences in central Colorado: geological, mineralogical and sulphur isotope constraints. Geological Magazine, 160 (7) 1345-1375 doi:10.1017/s0016756823000407
 
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