The Bureau of Mines investigated chromite deposits and occurrences in Alaska between 1979 and 1984 as part of the Bureau’s critical and strategic minerals program. Beneficiation and mineralogical characterization tests were performed on 68 samples.
Chromite-bearing ultramafic rocks occur in eight regions in Alaska. One hundred sixty-one subeconomic podiform-type deposits and one placer deposit are estimated to contain 3.4–4.7 million tons of chromic oxide (Cr2O3) in high-chromium and high-iron chromite. In most cases, mine-site beneficiation would be required to produce shipping-grade concentrates.
In the Chugach trend, an inferred reserve base comprises 2.8 million tons of Cr...
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