NOTES ON GEOPHYSICAL WORK AT MARYSVALE, UTAH

Technical Report · Thu May 01 04:00:00 EDT 1958

OSTI ID:4246842

Gilbert, R E

The Marysvale area lies in south-central Utah, 175 miles south of Salt Lake City. Uranium deposits of the area are in volcanic and plutonic rocks of Tertiary age. Direct current resistivity methods were tested in two localities in the Marysvale area. In the Bullion Monarch mine area, an altered rhyolite dike was successfully traced by this method, and the information was used in planning diamond drilling for uranium occurrences within the dike. In the Lucky Strike areas an attempt was made to locate the contact between quartz monzonite and rhyolite agglomerate and to measure the thickness of the rhyolite. Subsequent diamond driliing proved the contact to be about 200 ft farther east and 100 ft deeper than was predicted from the resistivity work. The error may have been caused by a lack of homogeneity in the basal section of the rhyolite. Self-potential and resistivity methods were tested across the Prospector vein. Neither method detected the vein. Resistivity methods can be used to outline zones of intense alteration, thereby supplying desirable information on the location of uranium deposits in altered rhyolite. Magnetometor traverses could be run along the old resistivity lines to ascertain if comparable results may be obtained. (auth)

• Research Organization: Grand Junction Operations Office. Salt Lake Branch Office, AEC
• NSA Number: NSA-13-015210
• OSTI ID: 4246842
• Report Number(s): RME-2050
• Country of Publication: United States
• Language: English

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