A field examination of radioactive occurrences in the Caddy Lake area of Manitoba

Abstract

The Caddy Lake area is located just north of the Trans Canada Highway near the Manitoba-Ontario border. The area surveyed is the eastern and northern contact of a granodiorite batholith intruded into Precambrian volcanic and sedimentary rocks. The survey consisted of 50 miles of traversing using a gammaray spectrometer and 88 radioactive anomalies of various magnitudes were defined. These anomalies are concentrated along contacts between the various rock units in the area. On the basis of the measured spectra and hand specimen examination, none of the anomalies appears to have economic significance.