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      Horizontally forced initiation of the Izu-Bonin-Mariana subduction zone

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      Communications Earth & Environment
      Springer Science and Business Media LLC

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          Abstract

          The sparsity of a direct record for the moment of subduction zone initiation has led to various models describing the infancy and evolution of modern oceanic subduction systems. Recently, with increases in available samples and geochemical data for subduction zone initiation-to-mature-arc lavas, better constraints on subduction evolution are possible. Here, by systemically modeling the time-space pattern and geochemical characters of forearc magmas with forward numerical modeling, we attempt to search for a best-fit geodynamic scenario where Izu-Bonin-Mariana-type subduction tends to develop. Our modeling and geochemical constraints have identified a necessary and possibly transitory pre-subduction zone initiation trenchward contraction consistent with observed Izu-Bonin-Mariana forearc magma geochemistry. Our results also reveal a typical maturation process for Izu-Bonin-Mariana-type oceanic subductions, controlled by the pace of the upper plate’s rifting and solidification.

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          A large-scale isotope anomaly in the Southern Hemisphere mantle

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            Distribution of stresses in the descending lithosphere from a global survey of focal-mechanism solutions of mantle earthquakes

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                Author and article information

                Contributors
                Journal
                Communications Earth & Environment
                Commun Earth Environ
                Springer Science and Business Media LLC
                2662-4435
                December 2024
                February 20 2024
                : 5
                : 1
                Article
                10.1038/s43247-024-01263-4
                e11f4bd0-de80-4117-801b-29d004e153a7
                © 2024

                https://creativecommons.org/licenses/by/4.0

                https://creativecommons.org/licenses/by/4.0

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