A high-resolution, controlled-source, electromagnetic survey in the Kapuskasing region, over exposed deep crustal material upthrust along ramp-and-flat geometry faults, reveals a shallow weakly-conductive layer (5,000--10,000 &OHgr;⋅m) within a resistive host (50,000--100,000 &OHgr;⋅m). This layer, at ≈1 km depth, correlates spatially with a zone of enhanced reflectivity, and coincident breaks in both conductivity and reflectivity suggest that a high-angle fault zone offsets the layer. The cause(s) of this enhanced conductivity is conjectural until this unit is drilled, but the two probable candidates are: (1) electrolytic conduction in saline-filled porous rocks, or (2) ionic conduction along connected grain-boundary films of graphite. Or both conduction mechanisms may be operating with the graphite interconnectivity provided by the brines. ¿ American Geophysical Union 1994