Abstract: Petrological and geochemical characteristics of highly altered pillow basalts closely associated with pelagic sedimentary rocks in the blocks incorporated in the ophiolitic melanges of Zagorje–Mid-Transdanubian zone, Dinaridic ophiolite zone and Vardar zone indicate that they must have been succesively generated at various geotectonic settings. Based on the abundance of elements which are immobile during alterations the basaltic rock suite splits into four geochemical groups: (1) within plate alkali basalts with significant enrichments in LILE and HFSE over HREE, (2) E-MORB-type basalts enriched in LREE, (3) N-MORB-type basalts depleted in LREE compared with HREE and (4) IAT-type basalts with LREE enrichment and significant HFSE depletion. Alkali basalts reflect mantle plume related intracontinental rifing volcanism which close precedes formation of the oldest spreading ridge crust in the proto-ocean. The remnants of this crust is represented by the E-MORB-type volcanics which are associated in stratigraphic succesion with Upper Triassic radiolarian cherts. N-MORB-type basalts derived from a depleted mantle and represent pure oceanic crust of a well established ocean. IAT-type basalts developed during initiation of the intraoceanic subduction in a proto-arc extensional setting. Biostratigraphic analysis of radiolarian asemblage of cherts in stratigraphic succesion with IAT-type basalts revealed Upper Baiotian to Lower Callovian ages. The results of this work provide monitoring of geodynamic evolution of Dinaric ocean segment from thestage of intracontinental rifting, most likely of Ladinian age, till intraoceanic subduction during Middle Jurassic.