Geochemical diversity in oceanic basalts hosted by the Zasur'ya accretionary complex, NW Russian Altai, Central Asia: Implications from trace elements and Nd isotopes

► HFSE-LREE depleted, transitional and enriched basalts coexist in the Zasur'ya AC. ► Three types of basalts are fragments of Early Paleozoic oceanic crust. ► The depleted basalts formed in a mid-oceanic ridge setting. ► The transitional and enriched basalts erupted in an intra-oceanic environment. ► Oceanic island basalts were derived from a heterogeneous mantle plume.