Skip to main content
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Fault weakening caused by smectite swelling

Fig. 3

Swelling pressure results for the JFAST samples. Swelling pressure results for the fault zone sample (solid blue squares for pure water and open squares for brine) and host rock sample (red squares) as a function of sample porosity. The data were fitted by the empirical equation of Hedin (2004) (blue and red dashed lines). Also shown are the in situ porosities of the fault zone deduced from logging data (Fig. 1b) and effective normal stress based on the fault’s depth, hydrostatic pore pressure, and measured rock densities (7 MPa; Fulton et al. 2013)

Back to article page