Aerial gamma ray and magnetic survey, Raton Basin Project. Volume II. Shiprock Quadrangle, Arizona/New Mexico. Final report

Technical Report · Fri Jun 01 04:00:00 EDT 1979

OSTI ID:6145020

The Shiprock 1/sup 0/ x 2/sup 0/ sheet covers portions of five major tectonic features: (1) San Juan Basin; (2) De Chelly Uplift; (3) Black Mesa Basin; (4) Defiance Uplift; and (5) Monument Uplift. Medsozoic sedimentary rocks dominate the lithology of the quadrangle. Scattered Tertiary volcanics are present. Uranium is being produced from epigenetic deposits in the Triassic Chinle and Jurassic Morrison Formations. A total of 130 statistical anomalies were defined of which a representative number are discussed. Only a small proportion of the anomalies were associated with known districts. The bulk of the anomalies were not associated with geologic units known to produce uranium elsewhere. The largest number of anomalies occurred in the Menefee Formation of Cretaceous age, although the highest count rate averages were observed in volcanics. The single largest anomaly appears associated with a mine location. Magnetic data in general define major structure, but only marginally reflect structural features in the overlying sediments.

• Research Organization: GeoMetrics, Inc., Sunnyvale, CA (USA)
• DOE Contract Number: EY-76-C-13-1664
• OSTI ID: 6145020
• Report Number(s): GJBX-116(79)(Vol.2)(Shiprock)
• Country of Publication: United States
• Language: English

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