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Focal depths and mechanisms of shallow earthquakes in the Himalayan-Tibetan region
Bai, L (Bai, Ling); Li, GH (Li, Guohui); Khan, NG (Khan, Nangyal G.); Zhao, JM (Zhao, Junmeng); Ding, L (Ding, Lin); Bai, L
Source PublicationGONDWANA RESEARCH
2017
Volume41Issue:0Pages:390-399
DOI10.1016/j.gr.2015.07.009
AbstractThe complexity of the Himalayan-Tibetan lithospheric deformation is evident from widespread seismicity and diverse focal mechanism solutions. Here we investigate the focal depths and fault plane solutions of 97 moderate and shallow earthquakes in the Himalayan-Tibetan region by modeling teleseismic P-wave and its tailing surface reflections pP and sP. Earthquakes in central Tibet are restricted to the upper crust and originate dominantly by strike-slip faulting, in agreement with the low P-wave velocity layers in the lower crust and the strong S-wave attenuation zones in the uppermost mantle. In northern and southern Tibet, where the Asian and Indian plates descend beneath central Tibet, earthquakes appear to be distributed throughout the thickness of the crust and exhibit dominantly reverse faulting. We incorporate well-estimated focal depths of 127 additional earthquakes from previous studies to estimate the seismogenic thickness (Ts) of the study region. The resulting pattern of Ts is found to be rather flat for central and northeastern Tibet and highly variable along the strike of the Himalayan foreland. (C) 2015 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
Subject Area地球物理学
WOS IDWOS:000397873300025
Language英语
Indexed BySCI
KeywordMANTLE BENEATH TIBET FAULT PLANE SOLUTIONS SOUTHERN TIBET LITHOSPHERIC MANTLE VELOCITY STRUCTURE SOURCE PARAMETERS ACTIVE TECTONICS TRAVEL-TIMES CENTRAL-ASIA TIEN-SHAN
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary ; Geology
Cooperation Status国内
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8391
Collection图书馆
Corresponding AuthorBai, L
AffiliationChinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China.
Recommended Citation
GB/T 7714
Bai, L ,Li, GH ,Khan, NG ,et al. Focal depths and mechanisms of shallow earthquakes in the Himalayan-Tibetan region[J]. GONDWANA RESEARCH,2017,41(0):390-399.
APA Bai, L ,Li, GH ,Khan, NG ,Zhao, JM ,Ding, L ,&Bai, L.(2017).Focal depths and mechanisms of shallow earthquakes in the Himalayan-Tibetan region.GONDWANA RESEARCH,41(0),390-399.
MLA Bai, L ,et al."Focal depths and mechanisms of shallow earthquakes in the Himalayan-Tibetan region".GONDWANA RESEARCH 41.0(2017):390-399.
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