New Crustal Vs Model Along an Array in South‐East China: Seismic Characters and Paleo‐Tethys Continental Amalgamation
Abstract The assembly of East Asia was closely linked to the closure of the Tethyan oceans. In south‐east China, the closure of the Paleo‐Tethys ocean led to a continental collision between the South China and North China blocks (SCB and NCB), forming the world renowned (ultra‐) high pressure (UHP)...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-07-01
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| Series: | Geochemistry, Geophysics, Geosystems |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2020GC009024 |
| _version_ | 1827771757671481344 |
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| author | Tingzi Li Liang Zhao Bo Wan Zheng‐Xiang Li Thomas Bodin Kun Wang Huaiyu Yuan |
| author_facet | Tingzi Li Liang Zhao Bo Wan Zheng‐Xiang Li Thomas Bodin Kun Wang Huaiyu Yuan |
| author_sort | Tingzi Li |
| collection | DOAJ |
| description | Abstract The assembly of East Asia was closely linked to the closure of the Tethyan oceans. In south‐east China, the closure of the Paleo‐Tethys ocean led to a continental collision between the South China and North China blocks (SCB and NCB), forming the world renowned (ultra‐) high pressure (UHP) metamorphic belt of the Dabie‐Sulu Orogen. The region was subsequently reworked by postorogenic extensional processes. These tectonic processes likely have left lithospheric scars identifiable by seismic imaging techniques. Here we characterize seismic structures across the orogen and analyze processes related to the closure of the Paleo‐Tethys. Using cutting‐edge tomographic approaches and ambient noise dispersion data, we developed a fine‐scale crustal shear‐wave velocity model beneath key crustal domains in the region. Distinct crustal scale velocity domains are identified, corresponding to the normal Precambrian crust, slow‐velocity suture zones and fault systems, and fast‐velocity orogens, suggesting a deep root of the corresponding surface geological features. By combining recent models of active‐source, gravity and magnetotellurics, characteristic lithospheric deformation patterns such as crustal thrust systems and lithospheric wedges can be inferred, which are attributed to a northward subduction of the SCB lithosphere and the eventual continental collision after the closure of the Paleo‐Tethys Ocean. |
| first_indexed | 2024-03-11T12:58:47Z |
| format | Article |
| id | doaj.art-a94b74f303e440fdb3d30a6f71a53ff1 |
| institution | Directory Open Access Journal |
| issn | 1525-2027 |
| language | English |
| last_indexed | 2024-03-11T12:58:47Z |
| publishDate | 2020-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj.art-a94b74f303e440fdb3d30a6f71a53ff12023-11-03T16:55:37ZengWileyGeochemistry, Geophysics, Geosystems1525-20272020-07-01217n/an/a10.1029/2020GC009024New Crustal Vs Model Along an Array in South‐East China: Seismic Characters and Paleo‐Tethys Continental AmalgamationTingzi Li0Liang Zhao1Bo Wan2Zheng‐Xiang Li3Thomas Bodin4Kun Wang5Huaiyu Yuan6State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaEarth Dynamics Research Group, ARC Centre of Excellence for Core to Crust Fluid Systems and the Institute for Geoscience Research, School of Earth and Planetary Sciences Curtin University Perth WA AustraliaUniversité Lyon, Université Lyon 1, Ens de Lyon, CNRS Lyon FranceState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaARC Centre of Excellence for Core to Crust Fluid Systems, Department of Earth and Environmental Sciences Macquarie University North Ryde NSW AustraliaAbstract The assembly of East Asia was closely linked to the closure of the Tethyan oceans. In south‐east China, the closure of the Paleo‐Tethys ocean led to a continental collision between the South China and North China blocks (SCB and NCB), forming the world renowned (ultra‐) high pressure (UHP) metamorphic belt of the Dabie‐Sulu Orogen. The region was subsequently reworked by postorogenic extensional processes. These tectonic processes likely have left lithospheric scars identifiable by seismic imaging techniques. Here we characterize seismic structures across the orogen and analyze processes related to the closure of the Paleo‐Tethys. Using cutting‐edge tomographic approaches and ambient noise dispersion data, we developed a fine‐scale crustal shear‐wave velocity model beneath key crustal domains in the region. Distinct crustal scale velocity domains are identified, corresponding to the normal Precambrian crust, slow‐velocity suture zones and fault systems, and fast‐velocity orogens, suggesting a deep root of the corresponding surface geological features. By combining recent models of active‐source, gravity and magnetotellurics, characteristic lithospheric deformation patterns such as crustal thrust systems and lithospheric wedges can be inferred, which are attributed to a northward subduction of the SCB lithosphere and the eventual continental collision after the closure of the Paleo‐Tethys Ocean.https://doi.org/10.1029/2020GC009024Paleo‐Tethyscontinental collisionshear wave velocityambient noisesouth‐east Chinawedge tectonics |
| spellingShingle | Tingzi Li Liang Zhao Bo Wan Zheng‐Xiang Li Thomas Bodin Kun Wang Huaiyu Yuan New Crustal Vs Model Along an Array in South‐East China: Seismic Characters and Paleo‐Tethys Continental Amalgamation Geochemistry, Geophysics, Geosystems Paleo‐Tethys continental collision shear wave velocity ambient noise south‐east China wedge tectonics |
| title | New Crustal Vs Model Along an Array in South‐East China: Seismic Characters and Paleo‐Tethys Continental Amalgamation |
| title_full | New Crustal Vs Model Along an Array in South‐East China: Seismic Characters and Paleo‐Tethys Continental Amalgamation |
| title_fullStr | New Crustal Vs Model Along an Array in South‐East China: Seismic Characters and Paleo‐Tethys Continental Amalgamation |
| title_full_unstemmed | New Crustal Vs Model Along an Array in South‐East China: Seismic Characters and Paleo‐Tethys Continental Amalgamation |
| title_short | New Crustal Vs Model Along an Array in South‐East China: Seismic Characters and Paleo‐Tethys Continental Amalgamation |
| title_sort | new crustal vs model along an array in south east china seismic characters and paleo tethys continental amalgamation |
| topic | Paleo‐Tethys continental collision shear wave velocity ambient noise south‐east China wedge tectonics |
| url | https://doi.org/10.1029/2020GC009024 |
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