Crustal structure beneath the central and western North China from receiver function analysis
The North China Craton (NCC) is one of the oldest cratons on earth. Several important tectonic transformations of Mesozoic-Cenozoic tectonic regime led to the destruction of the North China craton. The knowledge of crustal structure can provide important constraints for the formation and evolution o...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2022-12-01
|
| Series: | Earthquake Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S167445192200372X |
| _version_ | 1811167333065949184 |
|---|---|
| author | Xin Gao Yonghua Li Xiaoyu Yang Zhiyuan Ren |
| author_facet | Xin Gao Yonghua Li Xiaoyu Yang Zhiyuan Ren |
| author_sort | Xin Gao |
| collection | DOAJ |
| description | The North China Craton (NCC) is one of the oldest cratons on earth. Several important tectonic transformations of Mesozoic-Cenozoic tectonic regime led to the destruction of the North China craton. The knowledge of crustal structure can provide important constraints for the formation and evolution of cratons. New maps of sediment thickness, crustal thickness (H) and vP/vS (κ) in the central and western NCC were obtained using sequential H-κ stacking. P-wave receiver functions are calculated using teleseismic waveform data recorded by 405 stations from ChinArray project. Benefiting from the densely distribution of temporary seismic stations, our results reveal details of the crustal structure in the study area. The thickness of sedimentary layer in North China ranges from 0–6.4 km, and the thickest sedimentary layer is in Ordos block and its surroundings (about 2.8–6 km); The thickness of sedimentary layer in the Mongolia fold belt and Yinshan orogenic belt is relatively thin (less than 1 km). The crustal thickness of the study area varies between 27–48 km, of which the crust of the North China Plain is about 30–33 km, the central NCC is about 33–40 km, and the Ordos block is 40–48 km thick. The average vP/vS ratios in the study area is mostly between 1.66 and 1.90, and that in the Yanshan-Taihang mountain fold belt is between 1.70 and 1.85, and that in the Ordos block is between 1.65 and 1.90, with an average value of 1.77, indicating the absence of a thick basaltic lower crust. The obvious negative correlation between crustal thickness and average vP/vS ratio within Ordos and Central Asia orogenic belt may be related to magmatic underplating during the crustal formation. There is no significant correlation between the crustal thickness and the vP/vS ratio in the Lüliang-Taihang mountain fold belt, which may be related to the multiple geological processes such as underplating and crustal extension and thinning in this area. The lack of correlation between crust thickness and topography in the central orogenic belt and the North China Basin indicates the topography of these areas are controlled not only by crustal isostatic adjustment but also by the lithospheric mantle processes. |
| first_indexed | 2024-04-10T16:07:25Z |
| format | Article |
| id | doaj.art-b34687ed8e674511a720d520382c133d |
| institution | Directory Open Access Journal |
| issn | 1867-8777 |
| language | English |
| last_indexed | 2024-04-10T16:07:25Z |
| publishDate | 2022-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Earthquake Science |
| spelling | doaj.art-b34687ed8e674511a720d520382c133d2023-02-10T04:21:35ZengKeAi Communications Co., Ltd.Earthquake Science1867-87772022-12-01356448473Crustal structure beneath the central and western North China from receiver function analysisXin Gao0Yonghua Li1Xiaoyu Yang2Zhiyuan Ren3Institute of Geophysics, China Earthquake Administration, Beijing 100081, ChinaInstitute of Geophysics, China Earthquake Administration, Beijing 100081, China; Key Laboratory of Earthquake Source Physics, China Earthquake Administration, Beijing 100081, China; Corresponding author:Institute of Geophysics, China Earthquake Administration, Beijing 100081, China; Key Laboratory of Earthquake Source Physics, China Earthquake Administration, Beijing 100081, ChinaShandong Earthquake Agency, Jinan 250014, ChinaThe North China Craton (NCC) is one of the oldest cratons on earth. Several important tectonic transformations of Mesozoic-Cenozoic tectonic regime led to the destruction of the North China craton. The knowledge of crustal structure can provide important constraints for the formation and evolution of cratons. New maps of sediment thickness, crustal thickness (H) and vP/vS (κ) in the central and western NCC were obtained using sequential H-κ stacking. P-wave receiver functions are calculated using teleseismic waveform data recorded by 405 stations from ChinArray project. Benefiting from the densely distribution of temporary seismic stations, our results reveal details of the crustal structure in the study area. The thickness of sedimentary layer in North China ranges from 0–6.4 km, and the thickest sedimentary layer is in Ordos block and its surroundings (about 2.8–6 km); The thickness of sedimentary layer in the Mongolia fold belt and Yinshan orogenic belt is relatively thin (less than 1 km). The crustal thickness of the study area varies between 27–48 km, of which the crust of the North China Plain is about 30–33 km, the central NCC is about 33–40 km, and the Ordos block is 40–48 km thick. The average vP/vS ratios in the study area is mostly between 1.66 and 1.90, and that in the Yanshan-Taihang mountain fold belt is between 1.70 and 1.85, and that in the Ordos block is between 1.65 and 1.90, with an average value of 1.77, indicating the absence of a thick basaltic lower crust. The obvious negative correlation between crustal thickness and average vP/vS ratio within Ordos and Central Asia orogenic belt may be related to magmatic underplating during the crustal formation. There is no significant correlation between the crustal thickness and the vP/vS ratio in the Lüliang-Taihang mountain fold belt, which may be related to the multiple geological processes such as underplating and crustal extension and thinning in this area. The lack of correlation between crust thickness and topography in the central orogenic belt and the North China Basin indicates the topography of these areas are controlled not only by crustal isostatic adjustment but also by the lithospheric mantle processes.http://www.sciencedirect.com/science/article/pii/S167445192200372Xreceiver functionsH-κ stackingcrustal thicknessesvP/vS ratiosNorth China |
| spellingShingle | Xin Gao Yonghua Li Xiaoyu Yang Zhiyuan Ren Crustal structure beneath the central and western North China from receiver function analysis Earthquake Science receiver functions H-κ stacking crustal thicknesses vP/vS ratios North China |
| title | Crustal structure beneath the central and western North China from receiver function analysis |
| title_full | Crustal structure beneath the central and western North China from receiver function analysis |
| title_fullStr | Crustal structure beneath the central and western North China from receiver function analysis |
| title_full_unstemmed | Crustal structure beneath the central and western North China from receiver function analysis |
| title_short | Crustal structure beneath the central and western North China from receiver function analysis |
| title_sort | crustal structure beneath the central and western north china from receiver function analysis |
| topic | receiver functions H-κ stacking crustal thicknesses vP/vS ratios North China |
| url | http://www.sciencedirect.com/science/article/pii/S167445192200372X |
| work_keys_str_mv | AT xingao crustalstructurebeneaththecentralandwesternnorthchinafromreceiverfunctionanalysis AT yonghuali crustalstructurebeneaththecentralandwesternnorthchinafromreceiverfunctionanalysis AT xiaoyuyang crustalstructurebeneaththecentralandwesternnorthchinafromreceiverfunctionanalysis AT zhiyuanren crustalstructurebeneaththecentralandwesternnorthchinafromreceiverfunctionanalysis |