The Role of Upper Mantle Forces in Post-Subduction Tectonics: Plumelet and Active Rifting in the East Anatolian Plateau

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dc.authoridŞengül Uluocak, Ebru / 0000-0002-6701-463X
dc.contributor.authorŞengül Uluocak, Ebru
dc.contributor.authorPysklywec, Russell N.
dc.contributor.authorSembroni, Andrea
dc.contributor.authorBrune, Sascha
dc.contributor.authorFaccenna, Claudio
dc.date.accessioned2025-01-27T20:22:25Z
dc.date.available2025-01-27T20:22:25Z
dc.date.issued2024
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe spatiotemporal interaction of large- and regional-scale upper mantle forces can prevail in collisional settings. To better understand the role of these forces on post-subduction tectonics, we focus on mantle dynamics in the East Anatolian Plateau, a well-documented segment of the Arabian-Eurasian continental collision zone. Specifically, we analyze multiple forces in the upper mantle, which have not been considered in previous studies in this region. To this end, we use a state-of-the-art 3D instantaneous geodynamic model to quantify the dynamics of thermally defined upper mantle structures derived from seismic tomography data. Results reveal a prominent SW-NE-oriented mantle flow from the Arabian foreland to the Greater Caucasus–a plumelet–through a lithospheric channel under the East Anatolian Plateau. This plumelet induces localized dynamic topography (∼500 m) around the extensional Lake Van province, favoring NE-directed compression and westward escape of the Anatolian plate. We suggest that the Lake Van region is an active magma-rich intraplate rift in the Africa-Arabia-Anatolian plume-rift system. The rift zone was probably initiated by Neotethyan subduction-related forces and has been reactivated and/or sustained by the plumelet-induced convective support. Our findings are consistent with numerous observations, including the recent low-ultralow seismic velocities with a SW-NE splitting anisotropy pattern, geochemical and petrological studies, and local kinematics showing upper mantle-induced extensional tectonics in the collisional region.
dc.description.sponsorshipNational Science Foundation [EAR-0949446, EAR-1550901]; International Postdoctoral Research Fellowship Programme; European Union (ERC) [101087245]
dc.description.sponsorshipWe acknowledge Editor Boris Kaus, reviewer Nevena Andri & cacute;-Toma & scaron;evi & cacute; and an anonymous reviewer for their constructive and detailed comments. We acknowledge the Computational Infrastructure for Geodynamics (), which is funded by the National Science Foundation under award EAR-0949446 and EAR-1550901 for supporting the development of ASPECT. E & Scedil;U sincerely thanks the developers of ASPECT. Computations were performed on the GPC supercomputer at the Niagara HPC Consortium with support provided by the Department of Earth Sciences, University of Toronto () and Compute Canada (). E & Scedil;U thanks TUBITAK-BIDEB for support by the International Postdoctoral Research Fellowship Programme (2024-2025). SB has been funded by the European Union (ERC, EMERGE, 101087245).
dc.identifier.doi10.1029/2024GC011639
dc.identifier.issn1525-2027
dc.identifier.issue9
dc.identifier.scopus2-s2.0-85203361024
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1029/2024GC011639
dc.identifier.urihttps://hdl.handle.net/20.500.12428/21879
dc.identifier.volume25
dc.identifier.wosWOS:001309186700001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAmer Geophysical Union
dc.relation.ispartofGeochemistry Geophysics Geosystems
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectplumelet
dc.subjectintraplate rifting
dc.subjectpost-subduction tectonics
dc.subject3D geodynamic model
dc.subjectArabian-Eurasian collision
dc.subjectEast Anatolian Plateau
dc.titleThe Role of Upper Mantle Forces in Post-Subduction Tectonics: Plumelet and Active Rifting in the East Anatolian Plateau
dc.typeArticle

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