I am interested in processes occurring within subduction zones. My studies focus primarily on metamorphic rocks exhumed from within subduction zones. Much of my research has emphasized the understanding of subduction-related fluids, approaching questions of fluid sources, fluid flow pathways, and mass transfer. Recently I have become interested in understanding the tectonic history of subduction-related metamorphic rocks using trace element thermometry. I collect field data along with mineralogical, chemical, isotopic, and textural data and apply the concepts of equilibrium thermodynamics and mass transport. The tools that I use include the electron microprobe, cathodoluminescence microscopy, in situ trace element analysis of minerals and stable and radiogenic isotope analysis of oxygen, carbon, lithium, osmium, and sulfur in rocks and minerals.