Teleseismic P-wave traveltime tomography for the Leigiong volcano and Cathaysia block
文献类型：期刊论文
| 作者 | Lu, ZY; Qiu, XL; Ma, XJ; Fang, LH |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2018 |
| 卷号 | 60期号:12页码:4569-4579 |
| 通讯作者 | 154471897@qq.com ; xlqiu@scsio.ac.cn |
| 中文摘要 | We obtained 18968 reliable P wave relative traveltime residuals by adaptive stacking technique based on waveform cross-correlation of 256 distant earthquake records. The teleseismic waveform data were recorded by 94 permanent seismic stations belonging to seismic networks of Guangdong and neighboring provinces. The P wave velocity structure beneath the Leiqiong volcano and Cathaysia block down to 450 km depth was determined by the Fast Marching Teleseismic Tomography (FMTT). The results show an obvious low-velocity anomaly beneath the Leiqiong volcano from 100 km to 450 km depth. This low-velocity anomaly extends to the Cathaysia block with depth increasing. It is suggested that this low-velocity anomaly is caused by the upwelling of thermal materials of the Hainan plume, and the Leigiong volcano is an intraplate hot spot, which is consistent with previous results of body-wave tomography and receiver function studies. It is also inferred that the Hainan plume dips to the northeast and probably extends to 450 km depth from the pattern of the low-velocity anomalies. The low-velocity anomalies beneath the Cathaysia block is likely produced by the northeastward erosion of upwelling hot materials of the Hainan plume. The results may also imply that the lithospheric thickness of the study area tends to be thinner from the land to the sea. |
| 学科主题 | Geochemistry & Geophysics |
| 关键词[WOS] | Leigiong volcano ; Hainan plume ; Cathaysia block ; 3D velocity structure ; Seismic tomography |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17169]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Lu, ZY,Qiu, XL,Ma, XJ,et al. Teleseismic P-wave traveltime tomography for the Leigiong volcano and Cathaysia block[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,60(12):4569-4579. |
| APA | Lu, ZY,Qiu, XL,Ma, XJ,&Fang, LH.(2018).Teleseismic P-wave traveltime tomography for the Leigiong volcano and Cathaysia block.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(12),4569-4579. |
| MLA | Lu, ZY,et al."Teleseismic P-wave traveltime tomography for the Leigiong volcano and Cathaysia block".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.12(2018):4569-4579. |
入库方式： OAI收割
来源：南海海洋研究所
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