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Role of warm subduction in the seismological properties of the forearc mantle: An example from southwest Japan
A warm slab thermal structure plays an important role in controlling seismic properties of the slab and mantle wedge. Among warm subduction zones, most notably in southwest Japan, the spatial distribution of large S-wave delay times and deep nonvolcanic tremors in the forearc mantle indicate the pre...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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American Association for the Advancement of Science
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8270487/ https://www.ncbi.nlm.nih.gov/pubmed/34244142 http://dx.doi.org/10.1126/sciadv.abf8934 |
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author | Lee, Changyeol Kim, YoungHee |
author_facet | Lee, Changyeol Kim, YoungHee |
author_sort | Lee, Changyeol |
collection | PubMed |
description | A warm slab thermal structure plays an important role in controlling seismic properties of the slab and mantle wedge. Among warm subduction zones, most notably in southwest Japan, the spatial distribution of large S-wave delay times and deep nonvolcanic tremors in the forearc mantle indicate the presence of a serpentinite layer along the slab interface. However, the conditions under which such a layer is generated remains unclear. Using numerical models, we here show that a serpentinite layer begins to develop by the slab-derived fluids below the deeper end of the slab-mantle decoupling interface and grows toward the corner of the mantle wedge along the interface under warm subduction conditions only, explaining the large S-wave delay times in the forearc mantle. The serpentinite layer then allows continuous free-fluid flow toward the corner of the mantle wedge, presenting possible mechanisms for the deep nonvolcanic tremors in the forearc mantle. |
format | Online Article Text |
id | pubmed-8270487 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-82704872021-07-16 Role of warm subduction in the seismological properties of the forearc mantle: An example from southwest Japan Lee, Changyeol Kim, YoungHee Sci Adv Research Articles A warm slab thermal structure plays an important role in controlling seismic properties of the slab and mantle wedge. Among warm subduction zones, most notably in southwest Japan, the spatial distribution of large S-wave delay times and deep nonvolcanic tremors in the forearc mantle indicate the presence of a serpentinite layer along the slab interface. However, the conditions under which such a layer is generated remains unclear. Using numerical models, we here show that a serpentinite layer begins to develop by the slab-derived fluids below the deeper end of the slab-mantle decoupling interface and grows toward the corner of the mantle wedge along the interface under warm subduction conditions only, explaining the large S-wave delay times in the forearc mantle. The serpentinite layer then allows continuous free-fluid flow toward the corner of the mantle wedge, presenting possible mechanisms for the deep nonvolcanic tremors in the forearc mantle. American Association for the Advancement of Science 2021-07-09 /pmc/articles/PMC8270487/ /pubmed/34244142 http://dx.doi.org/10.1126/sciadv.abf8934 Text en Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Lee, Changyeol Kim, YoungHee Role of warm subduction in the seismological properties of the forearc mantle: An example from southwest Japan |
title | Role of warm subduction in the seismological properties of the forearc mantle: An example from southwest Japan |
title_full | Role of warm subduction in the seismological properties of the forearc mantle: An example from southwest Japan |
title_fullStr | Role of warm subduction in the seismological properties of the forearc mantle: An example from southwest Japan |
title_full_unstemmed | Role of warm subduction in the seismological properties of the forearc mantle: An example from southwest Japan |
title_short | Role of warm subduction in the seismological properties of the forearc mantle: An example from southwest Japan |
title_sort | role of warm subduction in the seismological properties of the forearc mantle: an example from southwest japan |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8270487/ https://www.ncbi.nlm.nih.gov/pubmed/34244142 http://dx.doi.org/10.1126/sciadv.abf8934 |
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