I am an isotope geochemist, interested in the cycling of trace elements in the ocean, and the biogeochemical and physical processes that influence their distributions. My previous work has focused on the use of isotopic variations to study how anthropogenic activities have perturbed the natural biogeochemical cycles of heavy metals (Pb and Cd) in the atmosphere and ocean.
As part of the Oxford-Shell collaboration, I am going to apply isotopic variations to study the marine biogeochemical cycle of Ba, with the ultimate aim of using Ba isotope variability to study past changes in marine biological productivity. The development of this novel tracer may therefore provide useful insights into the role of biological productivity in the accumulation and preservation of organic carbon in marine sediments.
M. Paul, L. Bridgestock, M. Rehkämper, T. van de Flierdt, D. J. Weiss, 2015, High-precision measurements of seawater Pb isotope compositions by double-spike thermal ionization mass spectrometry, Analytica Chimica Acta, Vol. 863, Pages 59-69
L. J. Bridgestock, H .Williams, M. Rehkämper. F. Larner, M.D. Giscard, S. Hammond, B. Coles, R. Andreasen, B. J. Wood, K. J. Theis, C. L. Smith, G. K. Benedix, M. Schonbachler, 2014, Unlocking the zinc isotope systematics of iron meteorites, Earth and Planetary Science Letters, Vol. 400, Pages 153-164
F. Larner, Y. Dogra, A. Dybowska, J. Fabrega, B. Stolp, L. J. Bridgestock, R. Goodhead, D. J. Weiss, J. Moger, J. R., Lead, E. Valsami-Jones, C. R. Tyler, T. S. Galloway, M. Rehkämper, 2012, Tracing bioavailability of ZnO nanoparticles using stable isotope labeling, Environmental Science & Technology, Vol. 42, Pages 12137-12145