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Progress in Earth and Planetary Science
Fig. 10 | Progress in Earth and Planetary Science

Fig. 10

From: Simultaneous measurements of elastic wave velocities and electrical conductivity in a brine-saturated granitic rock under confining pressures and their implication for interpretation of geophysical observations

Fig. 10

Relation between normalized conductivity and crack density parameter in brine-saturated granitic rock. The electrical conductivity is normalized by the fluid conductivity. Electrical conductivity was measured in brine-saturated sample AJG04 as a function of confining pressure. The crack density parameter was estimated from compressional and shear wave velocities in dry sample AJG02 as a function of confining pressure. Since Samples AJG02 and AJG04 have similar elastic wave velocities at atmospheric pressure, we assume that the two samples have the same crack density parameter at atmospheric pressure. We thus can relate the conductivity in AJG04 to the crack density parameter in AJG02

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