Topology of syntectonic melt-flow networks in the deep crust; inferences from three-dimensional images of leucosome geometry in migmatites

Abstract

are mixed rocks that comprise: (1) leucosome, representing former melt or its cumulate product, in some cases including residual and peritectic melting products; (2) melanosome, representing residual material, possibly including peritectic melting products; and, (3) mesosome, representing the least depleted material that most closely resembles the protolith in chemical composition. Exposed segments of the deep crust typically are migmatitic, which suggests they preserve evidence of the topology of syntectonic melt flow networks.