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Thunderbird Mine (Virginia Mine; Nelson Reserve On-3), Mesabi Range, St. Louis Co., Minnesota, USA



Detailed Mineral List:
Ankerite
Formula: Ca(Fe2+ ,Mg,Mn2+)(CO3)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Minnesotaite
Formula: (Fe,Mg)3(Si4O10)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Photo: © 2008, JGW. Minnesotaite from Thunderbird Mine, Mesabi Range, St. Louis Co., Minnesota, USA
Quartz var: Chert
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Siderite
Formula: FeCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.


6 entries listed. 5 valid minerals.
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