Petrochemistry and genesis of olivine basalts from small monogenetic parasitic cones of Bazman stratovolcano, Makran arc, southeastern Iran

► Olivine basalts form parasitic cones around Bazman volcano, Makran arc, southeast Iran. ► Basalts have high LIL/LREE (Ba/La) and LREE/HFSE (La/Nb) compared to MORB and OIB. ► Basalts form from mantle fluxed by dehydration of subducted Oman oceanic plate. ► Eastward in the arc, mantle melting decreases and crustal contamination increases.