Fig. 5
From: Compositional boundary layers trigger liquid unmixing in a basaltic crystal mush
The silicate liquid immiscibility field. Temperature as a function of the degree of polymerisation (NBO/T: NBO non-bridging oxygens and T = Si + Al + P + Ti), calculated from EPMA data on the glasses. The shaded grey region represents the experimentally defined two-liquid field12, the dotted line represents the maximum compositional space where the natural examples show evidence of unmixing by a compositional boundary layer
