Fig. 8

Small-scale mapping of the Main Fault intersected in Gallery 08. For location refer to Fig. 4. The Main Fault intersecting Gallery 08 is a 3 m thick thrust zone with a complex internal geometry characterised by two distinct structural domains separated by a reverse fault dipping steeply to the SSE. The upper part is strongly deformed and folded and has locally developed a crenulation cleavage. The lower part is characterised by apparently undisturbed rock masses embedded by a succession of fault planes and localised C′-type shear bands associated with NW thrusting displacement. The lower boundary fault is partly formed by tectonic breccia