My research involves: 1. Chemical oceanography – trace metal (REEs and Nd isotopes) cycling in the modern ocean 2. Palaeoceanography – Cretaceous ocean circulation and anoxic events 3. Experimental isotope geochemistry – calibration of fractionation factors for "non-traditional" stable isotopes (e.g. Si) 4. Astrobiology – environment of early Earth 5. Analytical method development and instrumentation