Mantle heterogeneity during the formation of the North Atlantic Igneous Province: Constraints from trace elementand Sr-Nd-Os-O isotope systematics of Baffin Island picrites - Francis, D.; KENT, A.J.R.; Stolper, E.M.; Woodhead, J.; Frei, R.; Eiler, J. (Geochemistry, Geophysics, Geosystems, 2004)