Abstract

Interpretation of a gravity survey acquired across the Norman Range, near Norman Wells, NWT, Canada, was integrated with geological and reflection seismic data to determine the most likely structural model for the subsurface. A thin-skinned structural interpretation of a low-angle thrust fault with a décollement within the Cambrian Saline River Formation yielded the best match between the calculated and observed gravity data and was supported by processed reflection seismic data. The interpretation predicts that potential reservoir rocks of the Devonian Ramparts Formation extend only a short distance below the Norman Range in the footwall of the Norman Range Thrust.

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