| Locality type: | Mine |
| Classification |
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| Species: | Sillimanite |
| Formula: | Al2(SiO4)O |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Sillimanite 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 |
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| Mindat Occurrence Record ID: | 736996 |
| Long-form Identifier: | 1:3:736996:4 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Sillimanite |
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| 3.2km (2.0 miles) | ⓘCopper Girl (Copper Girl 1906; Patented Claims: Valley View), Copper Gulch Area, 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 |
| 8.1km (5.0 miles) | ⓘDawson Gold project, Fremont County, Colorado, USA |
| 14.7km (9.1 miles) | ⓘFive Points Gulch, Fremont County, Colorado, USA |
| 20.3km (12.6 miles) | ⓘDevil's Hole Mine, Fremont County, Colorado, USA |
| 26.5km (16.5 miles) | ⓘMine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA |
| 26.6km (16.6 miles) | ⓘCotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA |
| 35.3km (21.9 miles) | ⓘWhopper Mine and Prospect, Micanite Mining District (Currant Creek Mining District), Colorado, USA |
| 37.0km (23.0 miles) | ⓘClimax Mine (Mine No. 8 U.S. Mica Company; Climax Mica Mine), Micanite Mining District (Currant Creek Mining District), Colorado, USA |
| 43.1km (26.8 miles) | ⓘFamous Lode Mica Prospect (Famous Lodge Pegmatites; Little Joe From Kokomo Claim Adjoining), Micanite Mining District (Currant Creek Mining District), Colorado, USA |
| References |
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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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