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| DOI | 10.1007/s11434-011-4577-x |
| Seismic P-wave tomography in eastern Tibet: Formation of the rifts | |
| Zhang Heng; Zhao JunMeng; Xu Qiang | |
| 通讯作者 | Zhang, H (通讯作者) |
| 发表日期 | 2011 |
| ISSN | 1001-6538 |
| EISSN | 1861-9541 |
| 起始页码 | 2450 |
| 结束页码 | 2455 |
| 卷号 | 56期号:23 |
| 英文摘要 | For better studying the relationship between the rifts and deep structure, a detailed P-wave velocity structure under eastern Tibet has been modeled using 4767 arrival times from 169 teleseismic events recorded by 51 portable stations. In horizontal slices through the model, a prominent low-velocity anomaly was detected under the rifts from the surface to a depth of similar to 250 km; this extends to a depth of similar to 400 km in the vertical slice. This low-velocity anomaly is interpreted as an upper mantle upwelling. The observations made provide seismic evidence for the formation of north-south trending rifts. East of the low-velocity anomaly, a clear high-velocity anomaly is found between depths of 40 and 200 km. Due to its shallow depth, we suggest that it consists of materials from an ancient continental closure rather than the Indian Plate. From depths of 250 to 400 km, a high-velocity anomaly appears to the south of the Jiali Fault. This anomaly may correspond to the northern edge of the Indian Plate that detached from the surface under the Himalayan block. We suggest that the Indian Plate underthrusts no further than the Jiali Fault in eastern Tibet. |
| 关键词 | INDIAN LITHOSPHERE BENEATHCRUSTAL STRUCTURESOUTHERN TIBETPLATEAUMANTLEANISOTROPYTHICKNESSNORTHERNHIMALAYASURFACE |
| 英文关键词 | tomography; upper mantle upwelling; Indian plate subduction; north-south trending rifts; Tibetan Plateau |
| 语种 | 英语 |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| WOS记录号 | WOS:000292928700008 |
| 来源期刊 | CHINESE SCIENCE BULLETIN
 |
| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/257840 |
| 推荐引用方式 GB/T 7714 | Zhang Heng,Zhao JunMeng,Xu Qiang. Seismic P-wave tomography in eastern Tibet: Formation of the rifts[J]. 中国科学院青藏高原研究所,2011,56(23). |
| APA | Zhang Heng,Zhao JunMeng,&Xu Qiang.(2011).Seismic P-wave tomography in eastern Tibet: Formation of the rifts.CHINESE SCIENCE BULLETIN,56(23). |
| MLA | Zhang Heng,et al."Seismic P-wave tomography in eastern Tibet: Formation of the rifts".CHINESE SCIENCE BULLETIN 56.23(2011). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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