“…A liquid immiscibility relationship has been suggested between peralkaline silicic rocks and natrocarbonatite at Lengai based on volcanological, geochemical and isotopic data (Bell and Dawson, 1995;Church and Jones, 1995;Dawson, 1989Dawson, , 1998Dawson et al, 1996;Halama et al, 2007;Keller and Spettel, 1995;Keller et al, 2010;Mitchell, 2009;Peterson, 1989aPeterson, , b, 1990Simonetti et al, 1997;Williams et al, 1986). Numerous experiments simulating the Lengai natrocarbonatite and related silicate compositions also support immiscibility (Brooker and Kjarsgaard, 2011;Cooper et al, 1975;Hamilton et al, 1979;Jago, 1991;Jago and Gittins, 1991;Kjarsgaard and Peterson, 1991;Kjarsgaard et al, 1995;Wyllie, 1994, 1998;Kjarsgaard, 2008, 2011;Veksler et al, 2012).…”