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Gabbro olistoliths from the Mts. Kalnik and Ivanščica ophiolite mélanges in the NW Dinaric-Vardar ophiolite zone (Croatia)

Mts. Kalnik and Ivanščica ophiolite mélanges vestige for the Repno oceanic domain (ROD), a discrete domain of Neo-Tethys that connects Meliata with Dinaric-Vardar oceanic systems. The domain exposes ophiolitic rocks in four mélange sectors: Mts. Ivanščica, Kalnik, Medvednica and Samoborska Gora. The large gabbro blocks are relatively more abundant in the Kalnik and Ivanščica Mts. mélange sectors, mostly exposed as fault-bounded tectonic inclusions incorporated during ophiolite/mélange emplacement. The preliminary results on petrography, mineral chemistry and bulk rock chemical composition of the gabbro olistoliths are presented and interpreted.

petrology and geochemistry; N-MORB; IAT; BABB; gabbro olistoliths; ophiolite mélange; Mts. Kalnik and Ivanščica; Croatia

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