“…Molinari et al (1987) first developed the VPSC code to study the plasticity of metals, and Lebensohn and Tome (1993) extended it to rock-forming minerals. The code has been applied to natural minerals such as ice (Castelnau et al, 1996a(Castelnau et al, , 1996bLebensohn et al, 2009), halite (Wenk et al, 1989b;Lebensohn et al, 2003), calcite (Wenk et al, 1987;Lebensohn et al, 1998), quartz (Wenk et al, 1989a) and olivine (Tommasi et al, 1999;Castelnau et al, 2008), where dislocation creep predominates in plastic deformation.…”