Crustal S-wave velocity structure in the western and central North China Craton and its geological significance
文献类型：期刊论文
| 作者 | Hou, Jue2,3,6; Pan, JiaTie2; Li, YongHua2; Wu, ZhenBo5; Yu, GuiPing1; Xu, Tao3,4 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 66期号:5页码:1960-1975 |
| ISSN号 | 0001-5733 |
| 关键词 | North China Craton Crustal structure Central orogenic belt Ambient noise Seismogenic background |
| DOI | 10.6038/cjg2022Q0287 |
| 英文摘要 | The North China Craton (NCC) is one of the oldest cratons in the world. In order to study the deep structure in the central and western parts of the NCC and its control on magma and earthquakes, we derive a new high-resolution 3-D shear wave velocity model of the central and western NCC crust and uppermost mantle using ambient noise tomography. The crosscorrelation of vertical -component continuous noise recordings from 461 temporary seismic stations belonging to the ChinArray project provides Rayleigh wave group velocity dispersions in the period range 5-45 s. These dispersion data at each model grid are inverted to obtain 1D shearwave velocity models, and then construct a pseudo-3-D model of crustal and uppermost mantle. The dense path coverage allows us to examine lateral variations of shear wave velocity structure in unprecedented detail, shedding new light on the deep structure and its impacts on magma activities and earthquakes. Our velocity model at depth of 8 km show that surface basins and mountains are characterized with low-velocity and high -velocity anomalies, respectively. The Swave velocity profiles in different longitude and latitude directions show that the crust of the western craton can be roughly divided into upper, middle and lower crust. The S-wave velocity in the lower crust of the Ordos block ranges between 3. 7 and 3. 8 km " s, suggesting that the lower crust is dominated by felsic rocks. The low S wave velocity anomaly below the Datong volcanic area extends from the middle crust to the uppermost mantle, implying that the upwelling mantle provides a near-vertical channel and controls the formation and development of Cenozoic magmatism in this area. The strong earthquakes are concentrated in the interior of the highvelocity bodies, or alternating regions of high and low velocities in the upper crust, and the middle-to-lower crust is characterized with low velocity, implying that creep rupture and stress release of stressed rigid blocks associated with the deep heat flow of the uppermost mantle/lower crust are the deep causes of large earthquakes. |
| WOS关键词 | NE TIBETAN PLATEAU ; JOINT INVERSION ; AMBIENT NOISE ; ORDOS BLOCK ; LITHOSPHERIC THICKNESS ; CENOZOIC BASALTS ; SEISMIC EVIDENCE ; BENEATH ; EVOLUTION ; DESTRUCTION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000980837100014 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110921]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Li, YongHua |
| 作者单位 | 1.Guilin Univ Technol, Coll Earth Sci, Guilin 541004, Peoples R China 2.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 5.Chengdu Univ Technol, Coll Geophys, Chengdu 610059, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, Jue,Pan, JiaTie,Li, YongHua,et al. Crustal S-wave velocity structure in the western and central North China Craton and its geological significance[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2023,66(5):1960-1975. |
| APA | Hou, Jue,Pan, JiaTie,Li, YongHua,Wu, ZhenBo,Yu, GuiPing,&Xu, Tao.(2023).Crustal S-wave velocity structure in the western and central North China Craton and its geological significance.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,66(5),1960-1975. |
| MLA | Hou, Jue,et al."Crustal S-wave velocity structure in the western and central North China Craton and its geological significance".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 66.5(2023):1960-1975. |
入库方式： OAI收割
来源：地质与地球物理研究所
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