Geochemistry of mafic dykes from the Southeast Anatolian ophiolites, Turkey: Implications for an intra-oceanic arc-basin system

► Dykes in southeast Anatolian Suture Belt characterize an intra-oceanic SSZ setting. ► Melts with distinct geochemical signatures include SSZ-, E-MORB-, and OIB-types. ► Trace element systematics indicates involvement of depleted and enriched sources. ► Melt segregation model indicates presence of spinel and garnet with/without spinel. ► The melt generation established through a roll-back mechanism in a back-arc setting.