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

REF:Deposit:: MOREY, G.B.,1972. MESABI RANGE; IN; SIMS,P.K. AND MOREY, G.B.,EDS., GEOLOGY OF MINNESOTA; A CENTENNIAL VOLUME,MINN.GEOL.SURV.,P.204-217.
Deposit:: WHITE, D.A.,1954. STRATIGRAPHY AND STRUCTURE OF THE MESABI RANGE, MINNESOTA, MINN.GEOL.SURV.BULL
Commodities (Major) - Iron
Development Status: Producer
Host Rock Unit: Biwabik - Ore, Divided Into 4 Informal Units: Upper Slaty 75' Thick Limestones And Marls; Upper Cherty - 175 Ft Of Conglomerate
Structure: Mesabi Range, Biwabik Fm. Exposed In A Long Narrow Belt Within The Mountains., Restricted Basin Required For Banded Iron Formation Deposition.
Tectonic Structure: North American Craton, Southern Most Portion Of Canadian Shield.





Map Reference: 47°28'56"N , 92°32'51"W

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Mineral List:
  • Ankerite
  • Calcite
  • Magnetite
  • Minnesotaite
  • Quartz
    var: Chert
  • Siderite


    6 entries listed. 5 valid minerals.

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