Neoproterozoic tectonic shift from collisional orogenesis to intraplate extension in the Yili Block, southern Central Asian Orogenic Belt

•ca. 983–905 Ma leucogranites and ca. 779 Ma mafic dikes were recognized in the northern Yili Block.•Leucogranites with an S-type affinity were derived by partial melting of pelitic and mafic rocks, whereas mafic dikes were formed from subduction-modified SCLM.•The Yili Block underwent early Neoproterozoic collisional orogenesis and switched to intraplate extension at ca. 779–776 Ma.•Contemporaneous tectonic evolution occurred in adjacent Kazakhstan and northern Tarim Craton.