Institutional Repository of State Key Laboratory of Lithospheric Evolution
| The thickness of the thermal lithosphere in mainland China and its geodynamic significance | |
Chen ChaoQiang1,2,3; He LiJuan1,2,3; Yan LiWen1,2,3; Wu JinHui1,2,3
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| 2022-08-01 | |
| Source Publication | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
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| ISSN | 0001-5733 |
| Volume | 65Issue:8Pages:3054-3063 |
| Abstract | Based on the latest heat flow data of mainland China and the fine crustal structure data, we calculate the thickness of thermal lithosphere for each heat flow measurement point by solving one-dimensional steady heat conduction equation. The contour map is drawn through Kriging interpolation method and optimized by artificial interpolation and Gaussian filtering. The results show that the thickness of thermal lithosphere varies greatly in different tectonic areas of China. The thermal lithosphere thickness in the stable cratons is the thickest (more than 200 km), followed by that in the orogenic belts (100 similar to 200 km). The destructed craton, North China Craton (NCC), has the thinnest thermal lithosphere, which is less than 100 km. By comparing the thickness between thermal lithosphere and seismic lithosphere of the three cratons in China, 4 conclusions are obtained as follow: 1) The western part of the Tarim craton, the middle-upper Yangtze craton, the western part of the NCC and the southern part of the NCC still remain normal, while the Bohai Bay Basin (the eastern part of NCC), the lower Yangtze craton and the southeastern part of the Tarim craton are thinned significantly; 2) In the western NCC, the thickness of thermal lithosphere, seismic lithosphere, and rheological boundary layer all thin from ordos to Yinchuan-Hetao depression in northeast and Fenwei depression in southeast, which is controlled by the mantle convection; 3) In the east NCC, the thermal lithospheric thickness of Bohai Bay Basin and the southern part of NCC differs significantly. The thickness of the thermal lithosphere in the southern part of NCC is about 60 km thicker than that in Fenwei depression, even though Fenwei depression is to the west of it and theoretically less influenced by subduction of the Pacific plate. These indicate the variability of the degree of destruction of NCC in different parts; 4) The thickness of thermal lithosphere, seismic lithosphere, and rheological boundary layer of the Yangtze craton gradually decrease from west to east, which may be controlled by the convection of the mantle promoted by subduction of the Pacific plate. |
| Keyword | Thermal lithosphere Seismic lithosphere Rheological boundary layer Craton |
| DOI | 10.6038/cjg2022P0319 |
| WOS Keyword | HEAT-FLOW ; BENEATH ; CRATON ; BASIN |
| Language | 英语 |
| WOS Research Area | Geochemistry & Geophysics |
| WOS Subject | Geochemistry & Geophysics |
| WOS ID | WOS:000836816500019 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.iggcas.ac.cn/handle/132A11/108399 |
| Collection | 岩石圈演化国家重点实验室 |
| Corresponding Author | He LiJuan |
| Affiliation | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| First Author Affilication | State Key Laboratory of Lithospheric Evolution; Institute of Geology and Geophysics, Chinese Academy of Sciences |
| Corresponding Author Affilication | State Key Laboratory of Lithospheric Evolution; Institute of Geology and Geophysics, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Chen ChaoQiang,He LiJuan,Yan LiWen,et al. The thickness of the thermal lithosphere in mainland China and its geodynamic significance[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2022,65(8):3054-3063. |
| APA | Chen ChaoQiang,He LiJuan,Yan LiWen,&Wu JinHui.(2022).The thickness of the thermal lithosphere in mainland China and its geodynamic significance.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,65(8),3054-3063. |
| MLA | Chen ChaoQiang,et al."The thickness of the thermal lithosphere in mainland China and its geodynamic significance".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 65.8(2022):3054-3063. |
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