Study of China lithosphere by receiver function and surface wave tomography

中国岩石圈的接收函数和表面波层析成像研究

• 批准号: 26476817
• 负责人: Dr. Xiaohui Yuan
• 金额: --
• 依托单位: Sektion 2.4: Seismologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/26476817?language=en
• 关键词: Study; China; lithosphere; receiver; function

High-resolution seismic observation of the lithosphere is hampered due to a number of factors. (1) As a gradient transition zone and as an upper boundary of a low-velocity zone (asthenosphere), the lithosphere-asthenosphere boundary (LAB) is hard to be detected by body waves or wide-angle seismic reflections; (2) Surface wave studies sometimes suffer from low resolution due to sparse station distribution. It is, however, shown that the resolution of surface wave tomography can be greatly improved by including higher mode surface waves (Priestley et al., 2005). The recently developed S receiver function method appears to provide another means to observe the LAB (Li et al., 2004; Kumar et al., 2005a,b,c). In the last several years China significantly expanded the permanent seismic network to more than 80 broadband stations. We propose here to combine applications of P and S receiver function methods with multi-mode surface wave tomography to study the lithospheric structure of China. Surface wave models might be used to improve the receiver function estimates in two ways: firstly they can straightforwardly be used in a joint inversion, where they remove some of the ambiguities associated with inversions of receiver functions alone; secondly they can provide appopriate models for time-depth conversion of the receiver functions. Knowledge about the the entire lithosphere, not only the crust, will significantly improve our understanding of plate tectonics of China and the Indo-Asian collision and of large intraplate earthquakes.

由于许多因素，岩石圈的高分辨率地震观测受到阻碍。(1)作为梯度过渡带和低速带(软流圈)的上界，岩石圈-软流圈边界(LAB)很难被体波或广角地震反射探测到；(2)面波研究有时由于台站分布稀疏而分辨率较低。然而，研究表明，通过包含更高模式的表面波，可以极大地提高面波层析成像的分辨率(Priestley等人，2005年)。最近发展起来的S接收函数方法似乎提供了另一种观察实验室的方法(Li等人，2004年；库马尔等人，2005a，b，c)。在过去的几年里，中国显着地将永久地震台网扩大到80多个宽带台站。我们建议将P和S接收函数方法与多模面波层析相结合，研究中国的岩石圈结构。面波模型可以通过两种方式改进接收函数估计：第一，它们可以直接用于联合反演，其中它们消除了仅与接收函数反演相关的一些模糊性；第二，它们可以为接收函数的时间-深度转换提供适当的模型。了解整个岩石圈，而不仅仅是地壳，将大大提高我们对中国板块构造、印度支那-亚洲碰撞和板内大地震的理解。

项目成果

The boundary between the Indian and Asian tectonic plates below Tibet

西藏以下印度板块与亚洲板块的分界线

• DOI: 10.1073/pnas.1001921107
• 发表时间: 2010-06-22
• 期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• 影响因子: 11.1
• 作者: Zhao, Junmeng;Yuan, Xiaohui;Wang, Wei
• 通讯作者: Wang, Wei

Seismic signature of the collision between the east Tibetan escape flow and the Sichuan Basin

藏东逃逸流与四川盆地碰撞的地震特征

• DOI: 10.1016/j.epsl.2010.01.046
• 发表时间: 2010-04
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: Zhang, Zhongjie;Yuan, Xiaohui;Chen, Yun;Tian, Xiaobo;Kind, Rainer;Li, Xueqing;Teng, Jiwen
• 通讯作者: Teng, Jiwen

Normal faulting from simple shear rifting in South Tibet, using evidence from passive seismic profiling across the Yadong-Gulu Rift

• DOI: 10.1016/j.tecto.2013.03.019
• 发表时间: 2013-10
• 期刊: Tectonophysics
• 影响因子: 2.9
• 作者: Zhongjie Zhang;Yun Chen;X. Yuan;Xiaobo Tian;S. Klemperer;T. Xu;Z. Bai;Hongshuang Zhang

Details of the Doublet Moho Structure beneath Lhasa, Tibet, Obtained by Comparison of P and S Receiver Functions

• DOI: 10.1785/0120100163
• 发表时间: 2011-06
• 期刊: Bulletin of the Seismological Society of America
• 影响因子: 3
• 作者: Xueqing Li;D. Wei;X. Yuan;R. Kind;Prakash Kumar;Hui-lan Zhou