Cenozoic Evolution of the Sulu Sea Arc-Basin System: An Overview

Lai, Chun-Kit and Xia, Xiao-Ping and Hall, Robert and Meffre, Sebastien and Tsikouras, Basilios and Rosana Balangue-Tarriela, Maria Ines and Idrus, Arifudin and Ifandi, Elena and Norazme, Nur 'aqidah (2021) Cenozoic Evolution of the Sulu Sea Arc-Basin System: An Overview. Tectonics, 40 (2). ISSN 02787407

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Abstract

The Cenozoic Sulu Sea arc-basin system is situated in the tectonic junction between the South China Sea (SCS), northern Borneo, Palawan Continental Terrane, Philippine Mobile Belt, and Celebes Sea. We compare new/published geochronological and geochemical data from across the circum-Sulu Sea region, and summarize seven major magmatic phases from the Middle Eocene to Pleistocene. The Middle Eocene (42.65 Ma) Sabah ophiolite and Eocene-Oligocene (34-33 Ma) Central Palawan ophiolite have MORB-IAT-transitional features, representing an intraoceanic subduction setting in the Paleogene northern Borneo and central-southern Palawan. After the SCS opening (∼32 Ma) and ridge jump (∼25 Ma), late-stage Proto-SCS subduction (24-21 Ma) may have formed the Panay arc andesite and the BABB magmatism in SW Zamboanga peninsula. Starting of final convergence between the Palawan Continental Terrane and northern Borneo-SW Philippines (∼21 Ma) likely caused regional uplift/thrusting, forming the Top Crocker Unconformity and triggering the NW-dipping Celebes Sea subduction. The subduction may have formed arc magmatism (21-18 Ma) in the Cagayan ridge and its continuation in Panay and NE Sabah, and opened the NW Sulu Sea back-arc basin through continental crust attenuation. Subduction rollback likely occurred in 17-14 Ma and 13-9 Ma, shifting arc magmatism southeast to the Sulu ridge and opening the SE Sulu Sea back-arc basin. NW-dipping Celebes Sea subduction largely ceased after ∼9 Ma, followed by extension-related uplift/exhumation and 4-0.2 Ma intraplate volcanism in northern Borneo. SE-dipping Sulu Sea subduction likely occurred along the Negros-Sulu trenches, and produced arc volcanism from ∼4 Ma. © 2020. The Authors.

Item Type: Article
Additional Information: Cited by: 33; All Open Access, Green Open Access, Hybrid Gold Open Access
Uncontrolled Keywords: Borneo; Pacific Ocean; South China Sea; Sulu Sea; Geophysics; Tectonics; Arc magmatism; Arc volcanism; Back-arc basin; Continental crusts; Geochemical data; Pleistocene; South China sea; Subduction rollback; backarc basin; Cenozoic; continental crust; Eocene-Oligocene boundary; intraplate process; magmatism; mobile belt; subduction zone; tectonic evolution; tectonic setting; unconformity; uplift; volcanism; Geochronology
Subjects: Q Science > QE Geology
Divisions: Faculty of Engineering > Geological Engineering Department
Depositing User: Sri JUNANDI
Date Deposited: 22 Oct 2024 04:04
Last Modified: 22 Oct 2024 04:04
URI: https://ir.lib.ugm.ac.id/id/eprint/5430

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