From subduction to strike slip-related volcanism: insights from Sr, Nd, and Pb isotopes and geochronology of lavas from Sivas–Malatya region, Central Eastern Anatolia

Abstract Anatolia is characterised by a complex geodynamic evolution, mirrored wide spectrum of magmatism. Here, we investigated the timing and geochemical/isotopic characters Miocene to Pliocene volcanism Sivas–Malatya Region (Central Eastern Anatolia), its relationships with local regional tectonics. Na-alkaline basaltic lavas were emplaced during middle at Sivas (16.7–13.1 Ma), in North, whilst transition from calc-alkaline rocks observed Yamada? Kepez Da? volcanic complexes. Calc-alkaline products erupted early Miocene, more precisely 19.5 13.6 Ma 16.4 13.5 Da?, final activity Arguvan field lasting till late (15.7–10.6 Ma). Volcanism renewed Kangal (5.9–4.0 Ma) emission K-alkaline igneous rocks. Mafic partially overlap age but can be easily distinguished their petrochemical characters. show typical subduction-related petrological geochemical affinities. They are both two-pyroxene or clinopyroxene amphibole-bearing rocks, high LILE/HFSE values, variable 87 Sr/ 86 Sr i (0.70396–0.70539) 143 Nd/ 144 Nd (0.51260–0.51287). big olivine phenocrysts intraplate flavours, although some LILE depletion respect HFSE as well (0.70347–0.70553) (0.51261–0.51291) isotopic compositions present. These characteristics suggestive for occurrence, stage genesis, possible interaction reservoirs. The K-alkali basalts still intraplate-like affinities ratios similar those largely (0.70425–0.70520) (0.51262–0.51277) compositions, overlapping arrays earlier stages volcanism. A general time, according evolution geodynamics region. Early magmas derived partial melting mantle wedge delimited subduction last oceanic branch Neotethys. magmas, on other hand, generated within asthenospheric beneath slab migrated through tears into where they mixed components. component decreased time transitional found youngest shortly followed clear within-plate formed field. appearance basin represents an abrupt change magma supply depth, continental crustal contamination en-route surface played important role genesis.