We measure isotopic compositions, and chemical abundances, integrated with field and petrologic observations to constrain the timing and nature of processes involved in geological and planetary systems. Areas of current interest include:
- Evolution of the early Earth and mantle with regard to formation of the earliest continental crust and implications for the atmosphere and hydrosphere
- Abundances of chemical elements and their isotopes as they are fractionated in geological processes
- Evolution and prehistory of the solar system through analysis of lunar rocks and soil, meteorites and presolar grains.
- The origin and evolution of ore-bodies through a combined isotopic, chemical and petrological approach.
- Determining the cause and timing of extinction events through high precision age determinations
- Revealing deep mantle evolution through noble gas isotopic compositions of mantle rocks and minerals