Link Migmatites to Granitic Body

Five problems of anatexites and granites have been discussed to study the generation of granitic body. The first is that partial melting takes place in non-equilibrium conditions originated from element-transfer in crystal and from melt-migration in migmatite. Minerals in non-equilibrium relation generally coexist in a migmatite. The second, the partial melting of migmatites is strongly affected by water-mobility in rocks and by increasing rate of temperature. The third, melt-convergence leads to occurrence of vein and to melt-depletion around veins. The fourth, the mechanism of melt-transfer is different between voluminous melt and little melt. Voluminous melt (>50 % melt) can move together with containing crystals. The fifth, there are some limiting relations between crustal thickness to melt and the size and volume of granitic body.