TY JOUR TI K-Ar geochronology of new volcanic centers eruptions in the Kazbek region of the Great Caucasus KW geochronology of new volcanic centers eruptions KW Kazbek region KW Mediterranean mobile belt. JO Russian Journal of Earth Sciences AU Chernyshev, I.V. AU Arakelyants, M.M. AU Lebedev, V.A. AU Bubnov, S.N. AU Gol'tsman, Y.V. PY 1999 IS 1 PB Geophysical Center of the Russian Academy of Sciences