Reestimation of slab dehydration fronts in Kuril-Kamchatka using updated global subduction zone thermal structures
Previous subduction thermal models are inconsistent with the values of forearc heat flow (50–140 mW/m(2)) and global P‒T conditions of exhumed rocks, both suggesting a shallow environment 200–300°C warmer than model predictions. Here, we revaluate these problems in Kuril-Kamchatka using 3D thermomec...
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ftpubmed:oai:pubmedcentral.nih.gov:10382886 2023-08-27T04:10:20+02:00 Reestimation of slab dehydration fronts in Kuril-Kamchatka using updated global subduction zone thermal structures Zhu, Weiling Ji, Yingfeng Liu, Lijun Qu, Rui Zhu, Ye Xie, Chaodi Ding, Lin 2023-07-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10382886/ http://www.ncbi.nlm.nih.gov/pubmed/37520704 https://doi.org/10.1016/j.isci.2023.107288 en eng Elsevier http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10382886/ http://www.ncbi.nlm.nih.gov/pubmed/37520704 http://dx.doi.org/10.1016/j.isci.2023.107288 © 2023 The Author(s) https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). iScience Article Text 2023 ftpubmed https://doi.org/10.1016/j.isci.2023.107288 2023-08-06T01:01:09Z Previous subduction thermal models are inconsistent with the values of forearc heat flow (50–140 mW/m(2)) and global P‒T conditions of exhumed rocks, both suggesting a shallow environment 200–300°C warmer than model predictions. Here, we revaluate these problems in Kuril-Kamchatka using 3D thermomechanical modeling that satisfies the observed subduction history and slab geometry, while our refined 3D slab thermal state is warmer than that predicted by previous 2D models and better matches observational constraints. We show that warmer slabs create hierarchical slab dehydration fronts at various forearc depths, causing fast and slow subduction earthquakes. We conclude that fast-to-slow subduction earthquakes all play a key role in balancing plate coupling energy release on megathrusts trenchward of high P-T volcanism. Text Kamchatka PubMed Central (PMC) iScience 26 8 107288 |
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Article Zhu, Weiling Ji, Yingfeng Liu, Lijun Qu, Rui Zhu, Ye Xie, Chaodi Ding, Lin Reestimation of slab dehydration fronts in Kuril-Kamchatka using updated global subduction zone thermal structures |
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Article |
description |
Previous subduction thermal models are inconsistent with the values of forearc heat flow (50–140 mW/m(2)) and global P‒T conditions of exhumed rocks, both suggesting a shallow environment 200–300°C warmer than model predictions. Here, we revaluate these problems in Kuril-Kamchatka using 3D thermomechanical modeling that satisfies the observed subduction history and slab geometry, while our refined 3D slab thermal state is warmer than that predicted by previous 2D models and better matches observational constraints. We show that warmer slabs create hierarchical slab dehydration fronts at various forearc depths, causing fast and slow subduction earthquakes. We conclude that fast-to-slow subduction earthquakes all play a key role in balancing plate coupling energy release on megathrusts trenchward of high P-T volcanism. |
format |
Text |
author |
Zhu, Weiling Ji, Yingfeng Liu, Lijun Qu, Rui Zhu, Ye Xie, Chaodi Ding, Lin |
author_facet |
Zhu, Weiling Ji, Yingfeng Liu, Lijun Qu, Rui Zhu, Ye Xie, Chaodi Ding, Lin |
author_sort |
Zhu, Weiling |
title |
Reestimation of slab dehydration fronts in Kuril-Kamchatka using updated global subduction zone thermal structures |
title_short |
Reestimation of slab dehydration fronts in Kuril-Kamchatka using updated global subduction zone thermal structures |
title_full |
Reestimation of slab dehydration fronts in Kuril-Kamchatka using updated global subduction zone thermal structures |
title_fullStr |
Reestimation of slab dehydration fronts in Kuril-Kamchatka using updated global subduction zone thermal structures |
title_full_unstemmed |
Reestimation of slab dehydration fronts in Kuril-Kamchatka using updated global subduction zone thermal structures |
title_sort |
reestimation of slab dehydration fronts in kuril-kamchatka using updated global subduction zone thermal structures |
publisher |
Elsevier |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10382886/ http://www.ncbi.nlm.nih.gov/pubmed/37520704 https://doi.org/10.1016/j.isci.2023.107288 |
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Kamchatka |
genre_facet |
Kamchatka |
op_source |
iScience |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10382886/ http://www.ncbi.nlm.nih.gov/pubmed/37520704 http://dx.doi.org/10.1016/j.isci.2023.107288 |
op_rights |
© 2023 The Author(s) https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
op_doi |
https://doi.org/10.1016/j.isci.2023.107288 |
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