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Progress in Earth and Planetary Science
Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

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. 1

Microstructures of a granitic rock sample (AJG02). Pl plagioclase, Qz quartz, Bt biotite. a A photomicrograph (plane light). The width is parallel to the axis of the cylindrical rock sample. b An SEM image. Both intragrain cracks (igc) and intergrain cracks (ogb) can be seen. A triangle shows damage from polishing. c Radial and d axial cross-sectional images of X-ray CT of a cylindrical sample (D = 2 mm, L = 6 mm), the axis of which is perpendicular to the thin section. Open grain boundaries (arrows) seem to be interconnected. Round pores (rp) are seen on grain boundaries and inside grains

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