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Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications
Song, Penghan1,2; Teng, Jiwen1; Zhang, Xuemei3; Liu, Youshan1; Si, Xiang4; Ma, Xueying1; Qiao, Yonghu5; Dong, Xingpeng6
2018-08-01
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN2169-9313
卷号123期号:8页码:6703-6718
摘要Determining high-resolution three-dimensional (3-D) crustal structures of the Qinling Orogenic Belt (QOB) can reveal significant evidences to enhance our understanding of its tectonic evolution. By jointly inverting group and phase velocity dispersion curves, we obtain a high-resolution 3-D shear wave velocity model for the QOB. According to the obviously layered features, which include an E-W trending high-velocity structure in the upper crust (0-10 km), a transitional zone in the middle crust (10-30 km), and an approximately N-S trending low-velocity zone in the middle-lower crust (20-40 km), we elucidate the crustal structure as a flyover model to explain how the crust beneath the QOB was deformed under the perpendicular force systems from the NE-SW and E-W directions during the Meso-Cenozoic. First, the apparent NE-SW trending low-velocity zone in the middle-lower crust indicates that the low-viscosity crustal materials beneath the northeastern Tibetan Plateau did not flow eastward into the eastern Qinling terrane during the Cenozoic. Second, the extension in the northern Qinling Mountains and Weihe Basin was not largely affected by the lateral crustal growth of the NE Tibetan Plateau, which might be the result of deep mantle upwelling and/or residual effects from the subduction of the western Pacific plate. Third, during the Mesozoic, the high-velocity structures beneath the Hannan-Micang and Shennongjia-Huangling domes served as anchors resisting the northward subduction, rotation, and continuous collision of the Yangtze Block. The eastward extruding Hannan-Micang dome served as an indenter that eventually shaped the present-day asymmetric style of the Dabashan Orocline during the Cenozoic.
关键词Qingling Orogenic Belt Tibetan Plateau Dabashan Orocline Weihe Basin crustal structure
DOI10.1029/2017JB015401
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
关键词[WOS]AMBIENT NOISE TOMOGRAPHY ; NE TIBETAN PLATEAU ; SURFACE-WAVE DISPERSION ; NORTH CHINA CRATON ; UPPER-MANTLE STRUCTURE ; LOW-VELOCITY ZONE ; RECEIVER FUNCTIONS ; JOINT INVERSION ; WEIHE GRABEN ; SICHUAN BASIN
语种英语
资助项目National Natural Science Foundation of China[41674102]
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000446170700034
出版者AMER GEOPHYSICAL UNION
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/89177
专题岩石圈演化国家重点实验室
通讯作者Song, Penghan
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
3.China Earthquake Networks Ctr, Beijing, Peoples R China
4.Minist Land & Resources, Strateg Res Ctr Oil & Gas Resources, Beijing, Peoples R China
5.Shanxi Normal Univ, Coll Geog Sci, Linfen, Peoples R China
6.Tsinghua Univ, Dept Math Sci, Beijing, Peoples R China
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GB/T 7714
Song, Penghan,Teng, Jiwen,Zhang, Xuemei,et al. Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(8):6703-6718.
APA Song, Penghan.,Teng, Jiwen.,Zhang, Xuemei.,Liu, Youshan.,Si, Xiang.,...&Dong, Xingpeng.(2018).Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(8),6703-6718.
MLA Song, Penghan,et al."Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.8(2018):6703-6718.
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