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

Abstract 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 fr...

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Autores principales:	Xingpeng Dong, Dinghui Yang, Fenglin Niu, Shaolin Liu, Ping Tong
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2044a38122c54aa78175f27474071ae9
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spelling	oai:doaj.org-article:2044a38122c54aa78175f27474071ae92021-12-02T17:23:03ZAdjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton10.1038/s41598-021-92048-82045-2322https://doaj.org/article/2044a38122c54aa78175f27474071ae92021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92048-8https://doaj.org/toc/2045-2322Abstract 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 (VSH > VSV). 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.Xingpeng DongDinghui YangFenglin NiuShaolin LiuPing TongNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xingpeng Dong Dinghui Yang Fenglin Niu Shaolin Liu Ping Tong Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton
description	Abstract 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 (VSH > VSV). 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.
format	article
author	Xingpeng Dong Dinghui Yang Fenglin Niu Shaolin Liu Ping Tong
author_facet	Xingpeng Dong Dinghui Yang Fenglin Niu Shaolin Liu Ping Tong
author_sort	Xingpeng Dong
title	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_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_sort	adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the north china craton
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2044a38122c54aa78175f27474071ae9
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Adjoint traveltime tomography unravels a scenario of horizontal mantle flow beneath the North China craton

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