“…Understanding the nature of lithospheric magnetization is challenging, because thermal gradients are a key factor and they are not well known, hence the magnetic crust can vary in thickness from less than 15 to more than 70 km. Over the last three decades there have been limited studies that relate magnetic anomalies to properties of deep-crustal rocks exposed at the surface (Brown et al, 2014;Dunlop et al, 2010;Ferr e et al, 2014;Kelso et al, 1993;Liu et al, 2012;McEnroe et al, 1998McEnroe et al, , 2001aMcEnroe et al, , 2001bMcEnroe et al, , 2002McEnroe et al, , 2004McEnroe et al, , 2006McEnroe et al, , 2007McEnroe et al, , 2009aMcEnroe et al, , 2009bPilkington & Percival, 1999Reynolds et al, 1990;Schlinger, 1985;Schmidt et al, 2007;Shive et al, 1992). Many exposures have been subjected to later processes such as retrograde metamorphism (Strada et al, 2006), or serpentinization that can alter the magnetic mineralogy.…”