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Uranium-bearing minerals in placer deposits of the Red River Valley, Elk City district, Idaho County, Idaho

Trace Elements Investigations 562

Prepared in cooperation with the U.S. Atomic Energy Commission
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Abstract

Uranium-bearing multiple oxide minerals were first recognized in the jig-bed concentrate of !the Tyee Mining Company'ss gold dredge on the Red River about 10 miles south of Elk City. Idaho County, Idaho, in late 1951 or early 1952. The gravels of the placer deposits were derived from the Idaho batholith and a roof pendant of Precambrian rocks in the batholith. Three samples taken for analysis show that the jig-bed concenuate contains 0.134 percent uranium. The nonmagnetic, non-radioactive fractions of the samples assayed 0.2 percent niobium, but no columbite was recognized in the samples. The uranium-bearing placer mineals are brannerite. euxenitte, davidite. betafite, and also contain niobium; ilmenite in the gravels may also contain some niobium. Pegmatites are believed to be the somce of the uranium- and niobium-bearing minerals, but the possibility of finding a pegmatite in the area ,that can be mined economically for uranium or niobium is remote.

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Uranium-bearing minerals in placer deposits of the Red River Valley, Elk City district, Idaho County, Idaho
Series title:
Trace Elements Investigations
Series number:
562
Year Published:
1955
Language:
English
Publisher:
U.S. Geological Survey
Description:
Report: 21 p.; Plate 1: 15.04 inches x 13.77 inches
Country:
United States
State:
Idaho
Additional Online Files(Y/N):
Y