Neogene sediment provenance and paleogeography of <scp>SE</scp> Sulawesi, Indonesia

Neogene syn-and post-orogenic sedimentary rocks in Sulawesi are important to understand the history of collision Australian continental crust with SE Asia. However, they have received relatively little attention, and generally been considered be molasse-type deposits similar characteristics across Sulawesi—the Celebes Molasse. New field sedimentological observations, results from heavy mineral studies detrital zircon U–Pb geochronology, together conventional sandstone petrography identify three provenance shifts, that can correlated significant tectonic events enable reconstruction palaeogeography Sulawesi. The first shift was related Early Miocene North volcanic arc, accompanied by ophiolite emplacement East Sulawesi, marked a change pre-collision carbonates ultramafic-rich clastics Bungku Formation. A second Late input abundant metamorphic detritus including blueschists into Pandua Formation indicating exhumation Oligo-Miocene subduction zone material. third change, Mio-Pliocene age, ophiolite- blueschist-rich quartz-rich Langkowala Formation, records blocking debris pathways rise progressive unroofing low- high-grade rocks. record emplacement, followed extension which led Mesozoic rocks, driven Banda rollback.