He uses geochemical and petrological tools to understand intraplate magmatism, subduction zone processes, and deep Earth geochemical cycles. Ongoing projects include the evolution of mantle plumes (from Large Igneous Provinces to modern hotspots), the role of island arcs in the generation of continental crust, and volatile budgets in the mantle. His research approach integrates a combination of field, lab, statistical, and theoretical methods with interdisciplinary collaboration with other fields in Earth Science.