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Lg-wave attenuation in the Australian crust

文献类型：期刊论文

作者Wei, Zhi1,2; Kennett, Brian L. N.3; Zhao, Lian-Feng1
刊名TECTONOPHYSICS
出版日期2017-10-16
卷号717页码:413-424
关键词Australian Continent Lg Attenuation Model Geological Features Frequency-dependent q Of Lg Waves Ground Motion
ISSN号0040-1951
DOI10.1016/j.tecto.2017.08.022
文献子类Article
英文摘要We estimate the Lg-wave quality factor (Q) across the Australian continent from vertical-component Lg waveforms. A tomographic inversion is performed to construct an Lg attenuation model for 58 frequencies between 0.05 and 10.0 Hz. The available spatial resolution is approximately 1.5 degrees x 1.5 degrees for the 0.5-2.0 Hz band. At 1.0 Hz, the Lg-wave Q over the whole island continent varies from 50 to 1250 with an average value of 850. Significant regional variations in the Lg-wave Q images tie well with many geological features and boundaries in Australia. The cratons in western, northern and southern parts of Australia usually have higher Q values (700-1250), while the volcanic regions, sedimentary basins and orogenic areas in eastern Australia are characterized by increased attenuation flower Q values, 50-650). We determine the frequency-dependent Q of Lg waves for different blocks across Australia, and find the frequency dependence of Q is much more complex than the traditional single power law representation. When combined with the assumed geometrical spreading relation, the Lg Q maps provide a new way of assessing potential ground motion across the continent for any event location.
WOS关键词CONTINENTAL UNITED-STATES ; UPPER-MANTLE ; MIDDLE-EAST ; CODA Q ; BENEATH ; PROPAGATION ; TOMOGRAPHY ; BOUNDARIES ; EVOLUTION ; SHIELD
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000414879200029
出版者ELSEVIER SCIENCE BV
资助机构China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; AuScope AuSREM project ; AuScope AuSREM project ; AuScope AuSREM project ; AuScope AuSREM project ; 41674060) ; 41674060) ; 41674060) ; 41674060) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; AuScope AuSREM project ; AuScope AuSREM project ; AuScope AuSREM project ; AuScope AuSREM project ; 41674060) ; 41674060) ; 41674060) ; 41674060) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; AuScope AuSREM project ; AuScope AuSREM project ; AuScope AuSREM project ; AuScope AuSREM project ; 41674060) ; 41674060) ; 41674060) ; 41674060) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; China Scholarship Council(201604910731) ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; National Natural Science Foundation of China(41374065 ; AuScope AuSREM project ; AuScope AuSREM project ; AuScope AuSREM project ; AuScope AuSREM project ; 41674060) ; 41674060) ; 41674060) ; 41674060)
源URL[http://ir.iggcas.ac.cn/handle/132A11/82132]  
专题中国科学院地质与地球物理研究所
通讯作者Wei, Zhi
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia
推荐引用方式
GB/T 7714		 Wei, Zhi,Kennett, Brian L. N.,Zhao, Lian-Feng. Lg-wave attenuation in the Australian crust[J]. TECTONOPHYSICS,2017,717:413-424.
APA Wei, Zhi,Kennett, Brian L. N.,&Zhao, Lian-Feng.(2017).Lg-wave attenuation in the Australian crust.TECTONOPHYSICS,717,413-424.
MLA Wei, Zhi,et al."Lg-wave attenuation in the Australian crust".TECTONOPHYSICS 717(2017):413-424.

入库方式： OAI收割

来源：地质与地球物理研究所

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