TY JOUR TI Deep Water Exchange Through Fracture Zones In The North Atlantic Ridge, Central Atlantic KW transform fracture zone KW dissolved oxygen KW nutrients KW water masses KW bottom flow KW thermohaline structure JO Russian Journal of Earth Sciences AU Seliverstova, A.M. AU Zuev, O.A. AU Efimova, K.A. PY 2025 IS 25 PB Geophysical Center of the Russian Academy of Sciences