TY JOUR TI Mantle substrate evolution of the Mid-Atlantic Ridge 14-16\deg N and 33\deg40apos; N: time and matter limitations of accretion processes of the oceanic lithosphere from the data of Sm-Nd research of isotope system KW Mid-Atlantic Ridge KW mantle substrate evolution KW accretion processes KW oceanic lithosphere. JO Russian Journal of Earth Sciences AU Silantiev, S.A. AU Karpenko, S.F. AU Bel'yatskiy, B.V. PY 2001 IS 2 PB Geophysical Center of the Russian Academy of Sciences