Aerial gamma Ray and Magnetic Survey: Chicago Quadrangle, Indiana, Illinois, and Michigan. Final Report

摘要

The Chicago quadrangle covers approximately 6000 square miles of area in the extreme northeastern portion of the Midwestern Physiographic Providence. Within this area, a moderately thick lower Paleozoic section overlies the Precambrian basement. Wisconsinan glacial material comprises the majority of material exposed at the surface. A search of available literature revealed no known uranium deposits. A total of 34 uranium anomalies were detected and are discussed briefly. None were considered significant since all appear to be related to cultural features. The magnetic data appear to primarily reflect complexities in the Precambrian basement. (ERA citation 06:010330)