Rosamond Prospect, Kern county, California

Trace Elements Memorandum 514
This report concerns works done on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission



Small quantities of autunite and gummite (?) occur in tuffaceous sedimentary rocks of the Rosamond formation of Miocene age at the Rosamond prospect. The property is about 10 miles south of Mojave, Jern County, California, in the western Mojave Desert. Examination of the propert in January 1952, by George W. Walker and Luther H. Baumgardner of the U.S. Geological Survey, indicates the the autunite occurs principally as coating on fracture and joint surfaces and, to a less extent, as disseminations in the tuffaceous rocks adjacent to faults. A waxy, reddish-brown, radioactive mineral, here called gummite (?), is found in small quantities on slickensided fault surfaces associated with iron oxides and chlorite (?). The uranium minerals are erratically distributed over an area of about 15 acres. Assay of 12 samples indicate a uranium content ranging from 0.002 to 0.59 percent and an average content of slightly less than 0.08 percent uranium.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Rosamond Prospect, Kern county, California
Series title Trace Elements Memorandum
Series number 514
DOI 10.3133/tem514
Year Published 1953
Language English
Publisher U.S. Geological Survey
Description Report: 11 p.; 1 Plate: 14.46 x 15.13 inches
Country United States
State California
County Kern County
Other Geospatial Rosamond Prospect
Additional Online Files (Y/N) Y
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