TY JOUR TI Magmatism of Mon and Knipovich ridges, polar Atlantics spreading zones, petrogeochemical study, Mid-Atlantic Ridge KW magmatism KW Knipovich ridge KW Atlantics spreading zones,. JO Russian Journal of Earth Sciences AU Sushchevskaya, N.M. AU Cherkashev, G.A. AU Tsekhonya, T.I. AU Bogdanov, Y.A. AU Belyatskiy, B.V. AU Kononkova, N.N. PY 2001 IS 2 PB Geophysical Center of the Russian Academy of Sciences