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

Liang Liu, Hong Yan Li, Lijun Liu, Jeffrey G. Ryan, Jason P. Morgan, Ke Xin Ren, Yi Gang Xu

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Article number91
JournalCommunications Earth and Environment
Volume5
Issue number1
DOIs
StatePublished - Dec 2024

ASJC Scopus subject areas

  • General Environmental Science
  • General Earth and Planetary Sciences

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