The Duluth Complex in northeastern Minnesota is the world’s largest known undeveloped reserves of copper, nickel and platinum group metals.
Estimates are that the complex holds about 9.5 billion tons of metallic mineral reserves, according to Dean Peterson, chief engineer with Big Rock Exploration and former program manager for the Economic Geology Group of the University of Minnesota Duluth Natural Resources Research Institute. A minerals exploration company is planning to look a little deeper into it.
Franconia Minerals LLC has submitted a proposal plan to the Minnesota Department of Natural Resources (DNR) to explore for metallic minerals on state land within several areas near Babbitt.
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