I am a tectonic petrologist - prof at the University of Arizona and a courtesy researcher at the University of Bucharest. I foucs on a variety of tectonics problems from subduction related (magmatism, subduction erosion, delamination) to extension and collision of the continents. I invetigate mineral evolution, ciclicity of orogens, sutures, transform faults, and metamorphism in collisional belts among others. At Univ. Arizona we run a trace elemental geochemical + radiogenic isotopic facility.