Deep resistivity measurements in the Fraser Valley, British Columbia

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Abstract
Deep resistivity soundings were made in the Fraser Valley, British Columbia, using signals induced by a large, direct-current, dipole source. Interpretation of apparent resistivity data indicates that 500 m of conducting ocean sediments overlie a resistive second layer and conducting third layer. A comparison of resistivity data with well data indicates that the resistive layer is composed of 4–5 km of sedimentary rocks covering 2–4 km of granitic rocks. The extremely low resistivity in the third layer is probably due to water saturation of the granitic to intermediate rocks at this depth.

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