Some Rare-Earth Mineral Deposits in Mohave County, Arizona

DURING LATE SUMMER, 1955, the writer spent a week in the western part of Arizona examining rare-earth mineral deposits in Mohave County. Occurrences of rare-earth minerals long have been reported from several pegmatite deposits in the Cerbat and Aquarius Ranges, north and southeast of Kingman, respectively. Galbraith (1947) reports chevkinite from the Aquarius Range (p. 90); gadolinite from near Kingman, " ... and in the northern part of the county, in sand dunes" (p. 87); euxenite in the Cerbat Range ". . . as scattered masses up to 50 pounds weight in pegmatite, Kingman Feldspar mine," and east of Big Sandy River, south of Burro Creek (p. 90); samarskite in the Aquarius Range with allanite (p. 40); and allanite in the Aquarius Range with gadolinite and at the Kingman Feldspar Mine (p. 89). Moore (1953) reports that gadolinite has been mined from pegmatites in the Aquarius Range, 30 miles south of Hackberry (p. 8); samarskite has been found in pegmatites in the Aquarius Range associated with allanite (p. 23); euxenite in masses up to 50 pounds has been found in the Kingman Feldspar Mine, Cerbat Range (p. 23); fergusonite has been produced by L. L. Edgerton from the Aquarius Range (p. 23), and allanite occurs at the Kingman Feldspar Mine (p. 26). Collections of the Smithsonian Institution in Washington, D. C., contain gadolinite from the Black Beauty Claim, 20 miles south of Hackberry, Arizona, and fergusonite from the Peacock Mining District near Kingman. 22 p.