TY JOUR TI Silicic Fe-Ti-oxide series of slow-spreading ridges: petrology, geochemistry, and genesis with reference to the Sierra Leone segment of the Mid-Atlantic Ridge axial zone at 6\deg N KW Slow-spreading ridges KW Ultramafic cumulates KW Fe-Ti-oxides. JO Russian Journal of Earth Sciences AU Sharkov, E.V. AU Bortnikov, N.S. AU Zinger, T.F. AU Chistyakov, A.V. PY 2005 IS 7 PB Geophysical Center of the Russian Academy of Sciences