Fig. 6
From: Reactivation of variably sealed joints and permeability enhancement in geothermal reservoir rocks
Permeability change as a function of bedding and joint orientation. a Permeability change as a function of bedding orientation for joint-free samples. b, c Permeability change as a function of b bedding orientation and c joint orientation for jointed samples. Circles denote Couches Intermédiaires (Box 117) samples; triangles denote Couches de Karlstal (Box 179) samples; squares denote Couches de Trifels (Box 388) samples. Unfilled symbols represent joint-free samples and filled symbols represent jointed samples. Double-outlined symbols represent samples where the experimentally induced fracture aligns with at least a portion of a pre-existing structural feature. Measurement error is within symbol size