My research has three main themes:
• magmatic processes at active volcanoes on land and at sea
• environmental geochemistry of heavy metals
• coral reefs and sea level history.

I study processes actively occuring today, as well as within the Holocene and latest Pleistocene, using radiometric, geochemical, petrological and geochronological approaches. Some examples are listed below:

• Geochronology of submarine and subaeial volcanism. My group is conducting on-going research on volcanoes in Hawaii, Iceland, Mexico, the submarine locales throughout the Pacific.
  • ²¹⁰Po-²¹⁰Pb dating. See also results from 9°50'N on the East Pacific Rise (EPR) the first application of this method to a submarine eruption in 1991.
  • ²¹⁰Pb-²²⁶Pb dating (page under construction)
  • ²²⁶Ra-²³⁰Th dating
  • ²³⁰Th-²³⁸U dating
• Marine Corals and the Record of Past Hawaiian Sea Level.
• Mantle Geochemistry.
• Short-lived Radioactive Isotopes in Natural Materials.
• Mid-Ocean Ridge Dynamics and Volcanism.
• Marine Chemistry: Elemental Fluxes from Erupting Mid-Ocean Ridge Volcanoes.
• Environmental Chemistry of Uranium and Depleted Uranium in Hawaii.