Mineral Resource Map
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Mine detail: Silent Friend
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North America
United States
Colorado
Boulder
Previously called ''
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Location
Lat / long:
39.99799, -105.36179
Resource(M)
Primary:
Tungsten
Tertiary:
Gold, Silver
Ore:
Pyrite, Gold, Chalcopyrite, Galena, Sphalerite, Tennantite
Production
Operation type:
Underground
Development status:
Past Producer
Geology
Host type:
Schist
References
MAS
80130719
DEP
10166210
Reference
REF. USGS PROF PAPER # 223 PLATE 22
Reporter
Intermountain Field Operations Center (IFOC)