Melt segregation and magma interactions during crustal melting: Breaking out of the matrix

Differentiation of the continental crust begins with its partial melting. The products of crustal melting are silicic, hydrous, H2O-undersaturated, granitic liquids that are generated within matrices of residual crystals. Crustal differentiation requires that felsic magmas form and escape from these solid residua. An important question is whether granitic magmas collect into large batches, within or near their sources, which then give rise to...