Fig. 4

Stereoplots (Schmidt, lower hemisphere). a Poles to GBF master fault orientations and slickenside lineations. b Poles to secondary faults of the GBF system. c Poles to mineralised joints. Contouring by the Kamb (1959) method in Stereonet9 software (contour interval of 0.5, significance of 1.25 sigma, grid spacing of 20; Allmendinger 2014)