Crustal thickness and Poisson's ratio of the Tengchong volcanic area in southwestern China
文献类型：期刊论文
| 作者 | Xu Yi1; Li Xue-Lei1,2; Wang Sheng1,2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 60期号:6页码:2256-2264 |
| 关键词 | Tengchong volcanic area Receiver function technique Crustal thickness V-p/V-s Poisson' ratios |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg20170618 |
| 文献子类 | Article |
| 英文摘要 | Tengchong is a Cenozoic volcanic area in the southeastern margin of the Tibetan plateau. Holocene volcanoes are mostly concentrated in the center of the Tengchong basin, showing a string-like volcanic cluster from north to south. In order to study the fine crustal structure and its relation with the magma activity of the volcanic area, we deployed a temporary earthquake observation across the major volcanoes in the Tengchong basin from May 2015 to July 2016. We used the teleseismic receiver function technique to determine the crustal thickness, V-p/V-s and Poisson's ratios of nine temporary stations. Results show a clear correlation of the crustal structure with volcano locations and evidence of the magma activity in the crust. For seven stations in the northern part of the profile, the crustal thickness varies between 35. 3 similar to 37. 6 km, with average Vp/Vs and Poisson's ratios between 1. 82 similar to 1. 92 and 0. 28 similar to 0. 31, respectively. Among them, the Moho interface beneath the MZT station is elevated by 1 similar to 2 km at depth, which is also characterized by the maximal Vp/Vs and Poisson' ratios, While the crustal thickness of the two stations in the southernmost part of the profile reaches 40 km, with average V-p/V-s and Poisson' ratios of only 1. 61 similar to 1. 64 and 0. 18 similar to 0. 20, respectively, much less than the results of other stations in the profile. Our analysis indicates that the mantle upwelling has significant effects on the local elevation of the Moho in the volcanic area. We speculate that the Crater Lake, Heikongshan, Dakongshan and Dayingshan volcanoes have an interconnected magma storage system within the crust. It has a size of about 20 km from north to south and isolates from the magma chamber beneath the Rehai geothermal field south of Tengchong. Undoubtedly, the heat flow activity and mantle intrusion should be responsible for the higher V-p/V-s and Poisson' ratios in the volcanic area. |
| WOS关键词 | RECEIVER FUNCTIONS ; TIBETAN PLATEAU ; MAGMA CHAMBERS ; WESTERN YUNNAN ; DAYINGSHAN VOLCANO ; FIELD ; BENEATH ; ROCKS ; TOMOGRAPHY ; SUBDUCTION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000403744600018 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/50667]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Xu Yi |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu Yi,Li Xue-Lei,Wang Sheng. Crustal thickness and Poisson's ratio of the Tengchong volcanic area in southwestern China[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017,60(6):2256-2264. |
| APA | Xu Yi,Li Xue-Lei,&Wang Sheng.(2017).Crustal thickness and Poisson's ratio of the Tengchong volcanic area in southwestern China.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(6),2256-2264. |
| MLA | Xu Yi,et al."Crustal thickness and Poisson's ratio of the Tengchong volcanic area in southwestern China".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.6(2017):2256-2264. |
入库方式： OAI收割
来源：地质与地球物理研究所
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