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Mantle heterogeneity caused by trapped water in the Southwest Basin of the South China Sea
Water is the most common volatile component inside the Earth. A substantial amount of water can be carried down to the interior of the Earth by subducting plates. However, how the subducted water evolves after the subducting slab breaks off remains poorly understood. Here we use the data from a pass...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10175291/ https://www.ncbi.nlm.nih.gov/pubmed/37169745 http://dx.doi.org/10.1038/s41467-023-38385-w |
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author | Tian, Jinyu Ma, Zhitu Lin, Jian Xu, Min Yu, Xun Le, Ba Manh Zhang, Xubo Zhang, Fan Guo, Laiyin |
author_facet | Tian, Jinyu Ma, Zhitu Lin, Jian Xu, Min Yu, Xun Le, Ba Manh Zhang, Xubo Zhang, Fan Guo, Laiyin |
author_sort | Tian, Jinyu |
collection | PubMed |
description | Water is the most common volatile component inside the Earth. A substantial amount of water can be carried down to the interior of the Earth by subducting plates. However, how the subducted water evolves after the subducting slab breaks off remains poorly understood. Here we use the data from a passive seismic experiment using ocean bottom seismometers (OBSs) together with the land stations to determine the high-resolution, three-dimensional seismic structure of the Southwest Sub-basin (SWSB) of the South China Sea (SCS). At depths below 40 km, the mantle shear velocity (Vsv) beneath the northern side of the SWSB is similar to that of the conventional oceanic pyrolite mantle, but roughly 3% shear-velocity reduction is found beneath the southern side of the SWSB. Results of thermal dynamic modeling reveal that the observed shear-velocity reduction could be explained by the presence of 150–300 ppm of water and 5–10% of lower continental crust. The inferred high-water content at the southern side of the SWSB is consistent with a model in which the Proto-SCS plate subducted southward prior to and during the formation of the SCS basin, releasing water into the upper mantle of the SWSB. |
format | Online Article Text |
id | pubmed-10175291 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-101752912023-05-13 Mantle heterogeneity caused by trapped water in the Southwest Basin of the South China Sea Tian, Jinyu Ma, Zhitu Lin, Jian Xu, Min Yu, Xun Le, Ba Manh Zhang, Xubo Zhang, Fan Guo, Laiyin Nat Commun Article Water is the most common volatile component inside the Earth. A substantial amount of water can be carried down to the interior of the Earth by subducting plates. However, how the subducted water evolves after the subducting slab breaks off remains poorly understood. Here we use the data from a passive seismic experiment using ocean bottom seismometers (OBSs) together with the land stations to determine the high-resolution, three-dimensional seismic structure of the Southwest Sub-basin (SWSB) of the South China Sea (SCS). At depths below 40 km, the mantle shear velocity (Vsv) beneath the northern side of the SWSB is similar to that of the conventional oceanic pyrolite mantle, but roughly 3% shear-velocity reduction is found beneath the southern side of the SWSB. Results of thermal dynamic modeling reveal that the observed shear-velocity reduction could be explained by the presence of 150–300 ppm of water and 5–10% of lower continental crust. The inferred high-water content at the southern side of the SWSB is consistent with a model in which the Proto-SCS plate subducted southward prior to and during the formation of the SCS basin, releasing water into the upper mantle of the SWSB. Nature Publishing Group UK 2023-05-11 /pmc/articles/PMC10175291/ /pubmed/37169745 http://dx.doi.org/10.1038/s41467-023-38385-w 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Tian, Jinyu Ma, Zhitu Lin, Jian Xu, Min Yu, Xun Le, Ba Manh Zhang, Xubo Zhang, Fan Guo, Laiyin Mantle heterogeneity caused by trapped water in the Southwest Basin of the South China Sea |
title | Mantle heterogeneity caused by trapped water in the Southwest Basin of the South China Sea |
title_full | Mantle heterogeneity caused by trapped water in the Southwest Basin of the South China Sea |
title_fullStr | Mantle heterogeneity caused by trapped water in the Southwest Basin of the South China Sea |
title_full_unstemmed | Mantle heterogeneity caused by trapped water in the Southwest Basin of the South China Sea |
title_short | Mantle heterogeneity caused by trapped water in the Southwest Basin of the South China Sea |
title_sort | mantle heterogeneity caused by trapped water in the southwest basin of the south china sea |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10175291/ https://www.ncbi.nlm.nih.gov/pubmed/37169745 http://dx.doi.org/10.1038/s41467-023-38385-w |
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