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Sulfide mining exploration in northeastern Minnesota

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Uploaded by on Nov 8, 2010

A helicopter with a magnetometer hanging below it--used for identifying possible sulfide mineral deposits--flies a grid pattern over a lake in northeastern Minnesota during the summer of 2010.

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  • We saw this helicopter flying over  Birch Lake near Babbitt, Minnesota, summer 2010. We've also watched three years of drilling over 3,000 feet under the lake.

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