New deposits of lead, zinc, and silver were found in a large altered zone 18 miles long and 2 to 5 miles wide near Quartz Creek west of Granite Mountain in the eastern Seward Peninsula, Alaska. New deposits of molybdenum, 'bismuth, and silver were found associated with a previously reported occurrence of uranium, copper, lead, and zinc minerals in the upper Peace River drainage northeast of Granite Mountain. Both groups of deposits are associated spatially with felsic plutonic rocks and occur near the western edge of a late Mesozeic province of volcanic plutonic rocks. Both groups of deposits warrant further investigation as possible exploration target areas. spectrographic analyses were done by K. J. Curry, E. E. Martinez, and J. M. Motooka, and atomic-absorption analyses were done by R. L. Miller and W. R. Vaughn. Officials of the Radio Corp. of America and their personnel at the Granite Mountain microwave relay station were very helpful and cooperative.
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