Abstract
The left-lateral strike-slip Central Sulawesi Fault System (CSFS, composed of the NNW Palu–Koro (PKF) and the ESE Matano faults) is located within the eastern Indonesian triple junction between the Pacific, Indo-Australian and Eurasian plates. Fault kinematic and fission-track analyses show that the Late Cenozoic central Sulawesi deformation results from three successive tectonic regimes: (1) A Late Miocene–early Pliocene (5 Ma) WNW-trending shortening characterized by transpressional deformation along the PKF and compressional in the Poso area. This tectonics resulted from the collision between the Banggai–Sula block with Sulawesi. It produced locally a transpressional regime as a consequence of the northward extrusion of the Central Sulawesi block limited by the PKF. (2) A Pliocene collapse tectonic regime associated with W-trending extension. Coeval with these events regional cooling and exhumation took place. (3) A Quaternary transtensional regime resulting from the combined effects of the Central Sulawesi block northward motion, and extension related to back-arc spreading behind the North Sulawesi subduction (Tomini Gulf).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.