Aerial gamma ray and magnetic survey: Mason City quadrangle, Iowa and Minnesota. Final report

Technical Report · Sun Feb 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/6605567· OSTI ID:6605567

The Mason City quadrangle covers 6900 miles of the northern Midwestern Physiographic Province in northern Iowa and southern Minnesota. The surface is largely covered by Quaternary glacial and related deposits. The subglacial surface is exposed only in the northeast and is composed of thin Mesozoic and Paleozoic sediments overlying Precambrian basement. A search of available literature revealed no known uranium deposits. A total of 89 uranium anomalies were detected and briefly described in this report. None were considered significant, and all appear to be related to cultural features. Concentrations of K, U, and T are extremely low throughout the quadrangle. Magnetic data appear to illustrate complexities in the underlying Precambrian.

• Research Organization: EG and G GeoMetrics, Sunnyvale, CA (USA)
• DOE Contract Number: AC13-76GJ01664
• OSTI ID: 6605567
• Report Number(s): GJBX-65(81)
• Country of Publication: United States
• Language: English

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