Field aspect of the diatexite migmatites. The upper images show the sequence across an abrupt metatexite to diatexite transition. (a) At the contact, the metatexite host is disrupted into tabular schollen by the injection of anatectic leucogranite. The schollen become smaller and rounded within a short distance into the diatexite body (upper right of the image). (b) The interior of the diatexite ∼100m from the contact; note fewer and more rounded schollen of metatexite, scattered biotite-rich schlieren and that the diatexite is mesocratic and uniform. Images (c) and (d) show a more gradational transition from metatexite to heterogeneous diatexite. (c) Metatexite (to the left) progressively injected by leucogranitic veins; the youngest are the most leucocratic and K-feldspar-rich and widen into the diatexite, suggesting that they root there. (d) Complex internal structure in the diatexite ∼10m from the contact. Cross-cutting, thin layers and units of diatexite each with a different grain size, proportion of ferromagnesian minerals, metatexite schollen, schlieren and internal flow structures, all cut by thin, leucocratic veins rich in K-feldspar. Arrows indicate some truncations of the compositional banding in the diatexite. Ruler in (a) is 15 cm long, and that in (d) is 30 cm.