The Brooks Range in northern Alaska (Fig. 1) contains an enormous accumulation of zinc and barite. The four deposits at Red Dog (Qanaiyaq, Main, Aqqaluk, and Paalaaq) have reserves and resources totaling 140.6 Mt at 16.6 percent Zn and 4.6 percent Pb (Jennings and King, 2002), which surpass most deposits worldwide in terms of grade and size (Fig. 2). Including resources of the unmined Su-Lik (38 Mt at 9% Zn + Pb; Jennings and King, 2002) and Anarraaq deposits (18 Mt at 23% Zn + Pb; King et al., 2002) northwest of...

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