“…Fault networks are critical geological features that can control the fluid flow pattern in the upper crust above the brittle-ductile transition (Rawling, Goodwin and Wilson, 2001;Wibberley, Yielding and Toro, 2008;Faulkner, Jackson, Lunn, Schlische, Shipton, Wibberley and Withjack, 2010). As such, assessing the permeability of these structure and being able to accurately simulate flow and transport in these networks is of considerable interest in a number of fields including mineral exploration (Barnicoat, Sheldon and Ord, 2009) oil and gas production (Ferronato, Gambolati, Janna and Teatini, 2008), natural gas storage (Gasanzade, Bauer and Pfei er, 2019), CO 2 -storage (Tillner, Langer, Kempka and Kühn, 2016), or radioactive waste disposal (Tsang, Neretnieks and Tsang, 2015).…”