A gradient in the dilational component of a differential state of stress will cause migration of the melt phase in a texturally (quasi)equilibrated partial melt. An experimental approach to image such deformation-induced melt migration is presented. Two-phase, solid-liquid aggregate beams (prepared by a glass-ceramic technique (having a primary crystalline base of MgSiO3 (orthoenstatite with a limited amount of clinoenstatite intergrowths) in chemical and textural equiibrium with a sodium aluminosilicate glass are subjected to four-point flexure; a first-order thermodynamic analysis, based on the energy balance between grain boundaries (solid-solid interfaces) and solid-liquid interfaces, indicates that the melt phase flows from that side of the specimen under a compressive principal stress to the specimen side under a tensile principal stress. When the solid-liquid aggregate is characterized by a Newtonian rheology (i. e., the deformation occurs via a solution-precipitation-enhanced diffusional creep mechanism), the melt migration is easily observed as a large deformation transient accompanying the flexural flow of a specimen. The melt migration is thus characterized as a completely recoverable, anelastic strain in the two-phase system; the rheology of the partially molten beams is well modelled by &egr;T(t)=&egr;0(1-exp) (-Bt)>+&egr;˙sst where &egr;T is the total inelastic strain, @e0 is the total anelastic strain due to melt migration, &egr;˙ss is the steady-state strain rate for the two-phase aggregate, t is time and B is a function of either the viscosity of the liquid phase or of the rheology (viscosity) of the two-phase aggregate. In the experiments reported here, the melt migration is shown to be rate limited by the kinetics of compaction and/or dilation of the crystalline residum. The impact of the experimental approach on compaction-based models of melt transport and segregation is discussed. ¿ American Geophysical Union 1990