I specialise in isotopic and geochemical methods applied to metamorphic, igneous and hydrothermal systems. In particular, I develop novel Laser Ablation ICP-MS techniques for the in-situ study of accessory minerals. My current research focus is on the secular evolution of the continental crust and complementary depleted mantle from the beginnings of the Earth through to the present day. I am also investigating the onset of “modern” plate tectonics and how to use accessory minerals to provenance ice coverage on Greenland. In addition, I have projects investigating the primary composition of kimberlitic magma as a probe of the lithospheric mantle, the evolution of the Sudbury impact melt sheet and the formation of Fe-oxide, copper and gold mineralization in Arctic Sweden. My ongoing interest is the tectonic evolution of the northwest Highlands of Scotland.