TY JOUR TI Early Precambrian mafic rocks of the Fennoscandian shield as a reflection of plume magmatism: Geochemical types and formation stages KW Early Precambrian KW mafic rocks KW plume magmatism KW Fennoscandian shield KW radiometric ages. JO Russian Journal of Earth Sciences AU Arestova, N.A. AU Lobach-Zhuchenko, S.B. AU Chekulaev, V.P. AU Gus'kova, E.G. PY 2003 IS 5 PB Geophysical Center of the Russian Academy of Sciences