Magnetotelluric Evidence for Lithospheric Hydration and Thinning Beneath the Youjiang Basin in Southwestern China
文献类型：期刊论文
| 作者 | Yang, Zhen4; Li, Xin4; Deng, Yangfan4 ; Yu, Nian3; Kong, Wenxin3; Chen, Minghao2; Chen, Yun1; Bai, Denghai1; Teng, Jiwen1
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
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| 出版日期 | 2025-02-01 |
| 卷号 | 130期号:2页码:22 |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2024JB029650 |
| 英文摘要 | Determining the water content in the lithospheric mantle is crucial for understanding its dynamic evolution. Because the electrical conductivity of mantle minerals is particularly sensitive to water, the magnetotelluric (MT) method becomes a vital tool to determine the water content in the lithospheric mantle. Here we used broadband and long-period MT data collected along a 600-km-long, NS-trending profile to obtain the electrical resistivity structure of the lithosphere across the southwestern South China Block. By combining the results of laboratory electrical conductivity measurements of mantle minerals, xenolith-derived composition, and geotherm information, we further estimated the water content of the lithospheric mantle. The results show that the Youjiang Basin has a relatively thin lithosphere segmented by zones of low-resistivity that spatially coincide with major faults. The relatively conductive mantle lithosphere could be explained by the combined effects of water in nominally anhydrous minerals, sulfide and phlogopite. Combined with regional tectonic context, we proposed that H2O-rich fluids derived from the previously subducted slabs and related metasomatic processes lead to lithospheric hydration and thinning within the Youjiang Basin. Additionally, such processes, together with magmatic-hydrothermal activities, likely contribute to the formation of gold deposits within the basin. By contrast, the lithosphere beneath the Yangtze Craton is characterized by high resistivity extending to a depth of similar to 200 km, representing a typical cratonic lithosphere that has not undergone significant tectonic modification and contains no or very little water. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001410242600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/82612]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Li, Xin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher & Environm Coevolut, Beijing, Peoples R China 2.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA USA 3.Chongqing Univ, Sch Elect Engn, Chongqing, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Deep Earth Proc & Resources, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Zhen,Li, Xin,Deng, Yangfan,et al. Magnetotelluric Evidence for Lithospheric Hydration and Thinning Beneath the Youjiang Basin in Southwestern China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2025,130(2):22. |
| APA | Yang, Zhen.,Li, Xin.,Deng, Yangfan.,Yu, Nian.,Kong, Wenxin.,...&Teng, Jiwen.(2025).Magnetotelluric Evidence for Lithospheric Hydration and Thinning Beneath the Youjiang Basin in Southwestern China.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,130(2),22. |
| MLA | Yang, Zhen,et al."Magnetotelluric Evidence for Lithospheric Hydration and Thinning Beneath the Youjiang Basin in Southwestern China".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 130.2(2025):22. |
入库方式： OAI收割
来源：广州地球化学研究所
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