Main commodities | Ag; Au |
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Other commodities | Cu; Sb |
Ore minerals | chalcopyrite; gold; pyrite; tetrahedrite |
Gangue minerals | quartz |
Quadrangle map, 1:250,000-scale | CR |
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Quadrangle map, 1:63,360-scale | A-1 |
Latitude | 55.14324 |
Longitude | -132.04844 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | The Fortune Mine is about 0.2 mile west of Lake Williams and about 0.1 mile south of James Lake. It is near the southeast corner of section 31, T. 77 S., R. 89 E. |
Geologic descriptionAs described by Brooks (1902), Wright and Wright (1908), Smith (1914), Chapin (1916), and Brooks and Capps (1924), the deposit at the Fortune Mine consists of 3 quartz veins 1 to 2 feet thick in graphitic schist with bands of marble. The veins strike N30W to N60W and dip 10 to 25N. They contain minor tetrahedrite, chalcopyrite, and pyrite. The Fortune Mine consists of a shallow shaft and several open cuts. There were small test shipments, one as late as 1922, but apparently no significant production. The schist and marble are part of the Wales Group of Late Proterozoic and Cambrian age (Herreid, 1967). The geology of the Dolomi area is dominated by an arcuate, generally north-trending, fault system and by a large dome centered over the eastern third of Paul Lake (Herreid, 1967). The Wales Group country rocks consist chiefly of several marble layers 200 to 1300 feet thick, interbedded with calcareous chlorite schist and marble. | |
Geologic map unit | (-132.050111069872, 55.1428842563078) |
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Mineral deposit model | Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a). |
Mineral deposit model number | 36a |
Age of mineralization | Veins are younger than the Late Proterozoic or Cambrian host rocks. |
Workings or exploration | The Fortune Mine consists of a shallow shaft and several open cuts. |
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Indication of production | Yes; small |
Reserve estimates | None. |
Production notes | There were small test shipments, one as late as 1922, but apparently no significant production. |
MRDS Number | A010039 |
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References | |
Reporters | D.J. Grybeck (Applied Geology) |
Last report date | 5/1/2004 |