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Published December 04, 2012, 12:00 AM

Duluth Metals

A drilling rig from Virginia-based IDEA Drilling collects core samples from the Duluth Metals exploration area just east of the Kawishiwi River near the Boundary Waters Canoe Area Wilderness on June 18, 2010. (2010 file / News Tribune)
Read the article: Even more minerals confirmed at Twin Metals mine site