A report containing the results of a transient magnetotelluric survey over a buried valley system in Southern Manitoba (1.3 Mb). Comparison with EM-47 data collected on nearly the same profile is very good. The TAMT data was able to resolve structure nearly as shallow as the EM-47 (7 m), but also four to five times deeper (400 m).

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Released courtesy of Cogema Resources Inc., this report contains the results of a transient magnetotelluric survey over the graphitic Saskatoon Lake conductor in North-Western Saskatchewan (3 Mb). Our TAMT data locates the conductor between stations 24W and 25W at 700 m depth while UTEM III data places the conductor between stations 23W and 24W at 800 m depth. This is reasonable given that there is also a shallow west dipping graphitic package of significant horizontal extent associated with the steeply dipping Saskatoon Lake conductor. The TAMT data may respond more strongly to the shallow west dipping graphitic package than does the UTEM III data. A very wide (1km), shallow TAMT anomaly within the sandstone correlates very well with gravity data collected on this line. The TM mode apparent resistivity and tipper indicate that the eastern edge of the shallow contact is very steeply dipping while the western edge is much more gradational. The TAMT data indicate that the depth to this feature is less than 150 m. This agrees very well with the interpretation of the gravity data which indicates a wedge like structure at less than 200 m depth with a sharp eastern edge and a moderately dipping western edge.

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