Preliminary summary of reconnaissance for uranium on the Seward Peninsula, Alaska, During 1951

Reconnaissance examinations for uranium were made at nine localities
in the York, Nome, and Koyuk districts of the Seward Peninsula, Alaska,
during .the 1951 field season. In addition carborne radiometric traverses
were made of four roads in the Nome and Council districts. Only at
Brooks Mountain in the York district are uranium-bearing deposits that
required detailed study.
On the southwest flank of Brooks Mountain, zeunerite occurs as a
surface coating on quartz-tourmaline veins occupying joint fractures in
granite| at a second locality, also on the southwest flank of the mountain,
zeunerite is disseminated in a highly-weathered, altered zone of granite
near a contact with limestone. Preliminary radiometric analyses show an
average of about 0.05 percent equivalent uranium in the vein material and
about 0.07 percent equivalent uranium in the weathered, altered granitic
zone.