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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
Lateral Variation of Crustal Lg Attenuation in Eastern North America

文献类型：期刊论文

作者Zhao, Lian-Feng1; Mousavi, S. Mostafa2
刊名SCIENTIFIC REPORTS
出版日期2018-05-08
卷号8
ISSN号2045-2322
DOI10.1038/s41598-018-25649-5
文献子类Article
英文摘要We perform Q(Lg) tomography for the northeastern part of North America. Vertical broadband seismograms of 473 crustal earthquakes recorded by 302 stations are processed to extract the Lg amplitude spectra. Tomographic inversions are independently conducted at 58 discrete frequencies distributed evenly in log space between 0.1 and 20.0 Hz. This relatively large dataset with good ray coverage allows us to image lateral variation of the crustal attenuation over the region. Obtained Q(Lg) maps at broadband and individual frequencies provide new insights into the crustal attenuation of the region and its relationship to geological structures and past tectonic activity in the area. The Q(Lg) shows more uniform values over the older, colder, and drier Canadian Shield, in contrast to higher variations in the younger margins. Results confirm the correlation of large-scale variations with crustal geological features in the area. Existence of low-velocity anomalies, thick sediments, volcanic rocks, and thin oceanic crust are potential sources of observed anomalies. The mean Q values are inversely correlated with average heat flow/generation for main geological provinces.
WOS关键词CONTINENTAL UNITED-STATES ; EARTHSCOPE TRANSPORTABLE ARRAY ; DEPENDENT SEISMIC ATTENUATION ; MIDCONTINENT RIFT SYSTEM ; WAVE Q TOMOGRAPHY ; TIBETAN PLATEAU ; CODA-Q ; MIDDLE-EAST ; OCEANIC ENVIRONMENTS ; SOUTHEASTERN CANADA
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000431627300062
出版者NATURE PUBLISHING GROUP
资助机构National Natural Science Foundation of China(41674060 ; National Natural Science Foundation of China(41674060 ; 41630210) ; 41630210) ; National Natural Science Foundation of China(41674060 ; National Natural Science Foundation of China(41674060 ; 41630210) ; 41630210) ; National Natural Science Foundation of China(41674060 ; National Natural Science Foundation of China(41674060 ; 41630210) ; 41630210) ; National Natural Science Foundation of China(41674060 ; National Natural Science Foundation of China(41674060 ; 41630210) ; 41630210)
源URL[http://ir.iggcas.ac.cn/handle/132A11/88300]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Mousavi, S. Mostafa
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Stanford Univ, Dept Geophys, Stanford, CA 94305 USA
推荐引用方式
GB/T 7714		 Zhao, Lian-Feng,Mousavi, S. Mostafa. Lateral Variation of Crustal Lg Attenuation in Eastern North America[J]. SCIENTIFIC REPORTS,2018,8.
APA Zhao, Lian-Feng,&Mousavi, S. Mostafa.(2018).Lateral Variation of Crustal Lg Attenuation in Eastern North America.SCIENTIFIC REPORTS,8.
MLA Zhao, Lian-Feng,et al."Lateral Variation of Crustal Lg Attenuation in Eastern North America".SCIENTIFIC REPORTS 8(2018).

入库方式： OAI收割

来源：地质与地球物理研究所

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