North Atlantic Mantle Reservoirs: Constraints on Origins and Mixing Relations from Double-Spike Pb Isotope Data
M. F. Thirlwall, M. A. M. Gee, R. N. Taylor and B. J. Murton
Dept. of Geology, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK
Southampton Oceanography Centre, Empress Dock, Southampton SO14 3ZH, UK