Thermodynamic and kinetic models of magmatic processes including adiabatic mantle melting and melt transport; the role of water in petrologic and geodynamic behavior of the mantle; melting and differentiation in the deep mantle and the early earth; experimental investigation of silicate and metallic liquids and minerals under static and dynamic high pressure; petrologic and geodynamic processes at mid-ocean ridges and back-arc basins.