Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton

The North China craton (NCC) was dominated by tectonic extension from late Cretaceous to Cenozoic, yet seismic studies on the relationship between crust extension and lithospheric mantle deformation are scarce. Here we present a three dimensional radially anisotropic model of NCC derived from adjoin...

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Autores principales: Dong, Xingpeng, Yang, Dinghui, Niu, Fenglin, Liu, Shaolin, Tong, Ping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8206337/
https://www.ncbi.nlm.nih.gov/pubmed/34131244
http://dx.doi.org/10.1038/s41598-021-92048-8
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author Dong, Xingpeng
Yang, Dinghui
Niu, Fenglin
Liu, Shaolin
Tong, Ping
author_facet Dong, Xingpeng
Yang, Dinghui
Niu, Fenglin
Liu, Shaolin
Tong, Ping
author_sort Dong, Xingpeng
collection PubMed
description The North China craton (NCC) was dominated by tectonic extension from late Cretaceous to Cenozoic, yet seismic studies on the relationship between crust extension and lithospheric mantle deformation are scarce. Here we present a three dimensional radially anisotropic model of NCC derived from adjoint traveltime tomography to address this issue. We find a prominent low S-wave velocity anomaly at lithospheric mantle depths beneath the Taihang Mountains, which extends eastward with a gradually decreasing amplitude. The horizontally elongated low-velocity anomaly is also featured by a distinctive positive radial anisotropy (V(SH) > V(SV)). Combining geodetic and other seismic measurements, we speculate the presence of a horizontal mantle flow beneath central and eastern NCC, which led to the extension of the overlying crust. We suggest that the rollback of Western Pacific slab likely played a pivotal role in generating the horizontal mantle flow at lithospheric depth beneath the central and eastern NCC.
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spelling pubmed-82063372021-06-16 Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton Dong, Xingpeng Yang, Dinghui Niu, Fenglin Liu, Shaolin Tong, Ping Sci Rep Article The North China craton (NCC) was dominated by tectonic extension from late Cretaceous to Cenozoic, yet seismic studies on the relationship between crust extension and lithospheric mantle deformation are scarce. Here we present a three dimensional radially anisotropic model of NCC derived from adjoint traveltime tomography to address this issue. We find a prominent low S-wave velocity anomaly at lithospheric mantle depths beneath the Taihang Mountains, which extends eastward with a gradually decreasing amplitude. The horizontally elongated low-velocity anomaly is also featured by a distinctive positive radial anisotropy (V(SH) > V(SV)). Combining geodetic and other seismic measurements, we speculate the presence of a horizontal mantle flow beneath central and eastern NCC, which led to the extension of the overlying crust. We suggest that the rollback of Western Pacific slab likely played a pivotal role in generating the horizontal mantle flow at lithospheric depth beneath the central and eastern NCC. Nature Publishing Group UK 2021-06-15 /pmc/articles/PMC8206337/ /pubmed/34131244 http://dx.doi.org/10.1038/s41598-021-92048-8 Text en © The Author(s) 2021 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
Dong, Xingpeng
Yang, Dinghui
Niu, Fenglin
Liu, Shaolin
Tong, Ping
Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton
title Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton
title_full Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton
title_fullStr Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton
title_full_unstemmed Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton
title_short Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton
title_sort adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the north china craton
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8206337/
https://www.ncbi.nlm.nih.gov/pubmed/34131244
http://dx.doi.org/10.1038/s41598-021-92048-8
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