I work on applications of experimental methods to understand the kinetics and mechanism of geochemical processes. In particular I'm interested in aqueous environments, especially those in which the chemistry of transition metals is controlled by their interactions with sulfide. My research includes understanding mineralisation in sediments and geothermal or hydrothermal environments, as well as applications of Fe, Cu and S stable isotopes to understand these processes. An area of developing interest is the use of x-ray computed tomography in experimental geoscience, and with colleagues at Edinburgh I have built a microtomography instrument to further this research.