Helen Mine (Hanna Mining Company Agt; Butler Brothers), Mesabi Range, Itasca Co., Minnesota, USA
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Development Status: Past Producer - Part of Butler Taconite Package, State of Minnesota, Butler Brother, 1942.
Host Rock Unit: Biwabik Iron Formation, Iron Formation
Structure: Faults
Tectonic Structure: Shield
Mineral List
3 entries listed. 2 valid minerals.
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References
White, D.A. (1954) Stratigraphy and structure of the Mesabi Range, Minnesota, PhD dissertation, University of Minnesota, 171 p.
Morey, G.B. (1972) The Mesabi Range: in Sims, P.K. & Morey, G.M. editors Geology of Minnesota: A Centennial Volume (in honor of George M. Schwartz),Minnesota Geological Survey: 204-217.
Office of Ore Estimation (19??) Mines Directory, University of Minnesota.
Tretheway, W.D., editor (1981) Minnesota Mining Directory: Minerals Resources Research Center: University of Minnesota, p. 82.
Morey, G.B. (1972) The Mesabi Range: in Sims, P.K. & Morey, G.M. editors Geology of Minnesota: A Centennial Volume (in honor of George M. Schwartz),Minnesota Geological Survey: 204-217.
Office of Ore Estimation (19??) Mines Directory, University of Minnesota.
Tretheway, W.D., editor (1981) Minnesota Mining Directory: Minerals Resources Research Center: University of Minnesota, p. 82.