1887

Abstract

A transient audio magnetotelluric (TAMT) survey was carried out in the Athabasca Basin of northern Saskatchewan as part of a uranium exploration program at Pasfield Lake. Five-hundred and fourty five stations were collected on seven parallel lines, each line roughly 20 km long with an intra-line spacing of approximately 1.5 km. A nominal station spacing of 250 m was used with infill stations collected at 125 m spacing where warranted. Inspection of the TAMT data revealed a complex structural setting near the line extremities with a large conductive block in the central portions of the lines. Two-dimensional inversion of the TAMT data was helpful but failed to fit the data satisfactorily in the structurally more complex areas. The results of 2.5D inversion (3D inversion on a single 2D profile) will be presented and compared to the original 2D inversions and known drilling. The 2.5D inversions show a much better fit to the measured data and fully reveals the structural complexity near the line endpoints. In terms of future direction, the present work will be incorporated with the 3D inverted model from the airborne magnetic data as well as the inverted results from an airborne gravity survey and 2D inversions of the airborne TEM data.

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/content/papers/10.3997/2214-4609-pdb.165.C_OP_04
2010-04-11
2024-03-29
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.165.C_OP_04
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