Lithospheric Effective Elastic Thickness and Its Anisotropy in the Northeast Qinghai-Tibetan Plateau
详细信息
- 责任者：Li Yongdong (China University of Geosciences ; Wuhan 430074 ; China) ; Zheng Yong
- 刊名：Chinese Journal of Geophysics
- 出版年：2013
- 卷期：56(4)
- 关键词：岩石圈 ; lithosphere ; 速度结构 ; velocity structure ; 青藏高原 ; Qinghai-Tibetan Plateau
- 页码：p.1132-1145
- 图表：illus., 83 refs.
- 分类号：0400
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
Adjacent to Qiangtang terrane,Tarim basin,Sichuan basin and North China block,the northeast Qinghai-Tibet plateau is one of the major tectonic provinces in mainland China,which is a combinative region with subduction,collision and intracontinental gathering and plays an important role in the deformation and evolution process of continental China.The lithospheric effective elastic thickness(T e) and its correspondent mechanical anisotropy are tightly related to the rheologic properties and the mechanic structures.Thus,studying on these characteristics in the northeast Qinghai-Tibet plateau will provide important information for understanding the rheologic structure and the dynamic process of continental lithosphere.In this work,Fan wavelet analysis on coherence between Bouguer anomaly and topography is applied to obtain a more detailed two dimensional lithospheric T e structure as well as its anisotropic properties in the Songpan-Garzêterrane.The results show that the effective elastic thickness of the lithosphere varies significantly from 5km to 100km.In general,in the east margin of the northeast QinghaiTibet plateau,the Songpan-Garzêterrane is a weak tectonic zone with a low T e(5km