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Upper-plate conduits linked to plate boundary that hosts slow earthquakes
In shallow subduction zones, fluid behavior impacts various geodynamic processes capable of regulating slip behaviors and forming mud volcanoes. However, evidence of structures that control the fluid transfer within an overriding plate is limited and the physical properties at the source faults of s...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10511545/ https://www.ncbi.nlm.nih.gov/pubmed/37730797 http://dx.doi.org/10.1038/s41467-023-40762-4 |
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author | Arai, Ryuta Miura, Seiichi Nakamura, Yasuyuki Fujie, Gou Kodaira, Shuichi Kaiho, Yuka Mochizuki, Kimihiro Nakata, Rie Kinoshita, Masataka Hashimoto, Yoshitaka Hamada, Yohei Okino, Kyoko |
author_facet | Arai, Ryuta Miura, Seiichi Nakamura, Yasuyuki Fujie, Gou Kodaira, Shuichi Kaiho, Yuka Mochizuki, Kimihiro Nakata, Rie Kinoshita, Masataka Hashimoto, Yoshitaka Hamada, Yohei Okino, Kyoko |
author_sort | Arai, Ryuta |
collection | PubMed |
description | In shallow subduction zones, fluid behavior impacts various geodynamic processes capable of regulating slip behaviors and forming mud volcanoes. However, evidence of structures that control the fluid transfer within an overriding plate is limited and the physical properties at the source faults of slow earthquakes are poorly understood. Here we present high-resolution seismic velocity models and reflection images of the Hyuga-nada area, Japan, where the Kyushu-Palau ridge subducts. We image distinct kilometer-wide columns in the upper plate with reduced velocities that extend vertically from the seafloor down to 10–13 km depth. We interpret the low-velocity columns as damaged zones caused by seamount subduction and suggest that they serve as conduits, facilitating vertical fluid migration from the plate boundary. The lateral variation in upper-plate velocity and seismic reflectivity along the plate boundary correlates with the distribution of slow earthquakes, indicating that the upper-plate drainage system controls the complex pattern of seismic slip at subduction faults. |
format | Online Article Text |
id | pubmed-10511545 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-105115452023-09-22 Upper-plate conduits linked to plate boundary that hosts slow earthquakes Arai, Ryuta Miura, Seiichi Nakamura, Yasuyuki Fujie, Gou Kodaira, Shuichi Kaiho, Yuka Mochizuki, Kimihiro Nakata, Rie Kinoshita, Masataka Hashimoto, Yoshitaka Hamada, Yohei Okino, Kyoko Nat Commun Article In shallow subduction zones, fluid behavior impacts various geodynamic processes capable of regulating slip behaviors and forming mud volcanoes. However, evidence of structures that control the fluid transfer within an overriding plate is limited and the physical properties at the source faults of slow earthquakes are poorly understood. Here we present high-resolution seismic velocity models and reflection images of the Hyuga-nada area, Japan, where the Kyushu-Palau ridge subducts. We image distinct kilometer-wide columns in the upper plate with reduced velocities that extend vertically from the seafloor down to 10–13 km depth. We interpret the low-velocity columns as damaged zones caused by seamount subduction and suggest that they serve as conduits, facilitating vertical fluid migration from the plate boundary. The lateral variation in upper-plate velocity and seismic reflectivity along the plate boundary correlates with the distribution of slow earthquakes, indicating that the upper-plate drainage system controls the complex pattern of seismic slip at subduction faults. Nature Publishing Group UK 2023-09-20 /pmc/articles/PMC10511545/ /pubmed/37730797 http://dx.doi.org/10.1038/s41467-023-40762-4 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Arai, Ryuta Miura, Seiichi Nakamura, Yasuyuki Fujie, Gou Kodaira, Shuichi Kaiho, Yuka Mochizuki, Kimihiro Nakata, Rie Kinoshita, Masataka Hashimoto, Yoshitaka Hamada, Yohei Okino, Kyoko Upper-plate conduits linked to plate boundary that hosts slow earthquakes |
title | Upper-plate conduits linked to plate boundary that hosts slow earthquakes |
title_full | Upper-plate conduits linked to plate boundary that hosts slow earthquakes |
title_fullStr | Upper-plate conduits linked to plate boundary that hosts slow earthquakes |
title_full_unstemmed | Upper-plate conduits linked to plate boundary that hosts slow earthquakes |
title_short | Upper-plate conduits linked to plate boundary that hosts slow earthquakes |
title_sort | upper-plate conduits linked to plate boundary that hosts slow earthquakes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10511545/ https://www.ncbi.nlm.nih.gov/pubmed/37730797 http://dx.doi.org/10.1038/s41467-023-40762-4 |
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