Numerical simulations of subduction, relamination and accretion of magmatic arcs – implications for continent-ocean convergent margins

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F25%3A10169561" target="_blank" >RIV/00025798:_____/25:10169561 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.epsl.2024.119192" target="_blank" >https://doi.org/10.1016/j.epsl.2024.119192</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.epsl.2024.119192" target="_blank" >10.1016/j.epsl.2024.119192</a>

Result language

angličtina

Original language name

Numerical simulations of subduction, relamination and accretion of magmatic arcs – implications for continent-ocean convergent margins

Original language description

Magmatic arcs above subduction zones are places where new felsic crustal material is created. On the other hand, arcs, together with warm back-arc regions, are zones of weakness that focus deformation. Here we investigate the final phase of oceanic subduction and the subsequent fate of magmatic arcs, namely their deformation, accretion to the continental margin, or subduction into the mantle. We use two-dimensional thermo-mechanical numerical models that mimic the closing of the continent-arc-back-arc system, where the arc and back-arc are placed at an oceanic plate. We distinguish two contrasting styles of evolution. The first one (subduction transference) is characterized by formation of a new plate boundary in the weak back-arc lithosphere and subduction of the arc at this boundary. During this process, a part of the arc crust may be accreted to the continental margin, but a significant portion of the arc is dragged into the mantle. In the mantle, the upper buoyant part of the arc crust separates from the rest of the arc lithosphere and flows beneath the lithospheric mantle of the upper plate - it is relaminated to the upper plate. The second contrasting evolutionary style (polarity reversal) is arc accretion and the development of a new subduction zone underneath the arc. The new subduction has an opposite polarity than the original oceanic subduction. Arc accretion and subduction polarity reversal occur when the arc is very weak due to a high temperature or weak lithologies at its base.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GX19-27682X" target="_blank" >GX19-27682X: Principal mechanisms of peripheral continental growth during supercontinent cycle</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

EARTH AND PLANETARY SCIENCE LETTERS

ISSN

0012-821X

e-ISSN

1385-013X

Volume of the periodical

652

Issue of the periodical within the volume

119192

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

12

Pages from-to

nestránkováno

UT code for WoS article

001412489300001

EID of the result in the Scopus database

2-s2.0-85213285360