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Lateral variation in seismic velocities and rheology beneath the Qinling-Dabie orogen

文献类型：期刊论文

作者Deng YangFan1; Chen Lin2; Xu Tao2,3; Wu Jing2; Romanelli, Fabio4; Panza, Giuliano Francesco4,5,6
刊名SCIENCE CHINA-EARTH SCIENCES
出版日期2017-03-01
卷号60期号:3页码:576-588
关键词Qinling-dabie Orogen Deep Seismic Sounding Tomography Rheology Seismicity
ISSN号1674-7313
DOI10.1007/s11430-016-0101-6
文献子类Article
英文摘要The Qinling-Dabie orogen is an important tectonic belt that trends east-west and divides continental China into northern and southern parts. Due to its strong deformation, complicated structure, multiphase structural superposition and the massive exposed high and ultrahigh metamorphic rocks, its tectonic formation and geodynamical evolution are hot research topics worldwide. Previous studies mainly focused on the regional geological or geochemical aspects, whereas the geophysical constraints are few and isolated, in particular on the orogenic scale. Here, we integrate the available P- and S-wave seismic and seismicity data, and construct the rheological structures along the Qinling-Dabie orogen. The results demonstrate that: (1) there are strong lateral variations in the crustal velocity between the western and eastern sections of the Qinling-Dabie orogen, indicating the different origin and tectonic evolution between these two parts; (2) the lateral variations are also manifested in the rheological structure. The rigid blocks, such as South China and Ordos basin (North China Craton), resist deformation and show low seismicity. The weak regions, such as the margin of Tibet and western Qinling-Dabie experience strong deformation and accumulated stress, thus show active seismicity; (3) in the lower crust of most of the HP/UHP terranes the values of P-wave velocity are higher than the global average ones; finally (4) low P- and S-wave velocities and low strength in the lower crust and lithospheric mantle beneath Dabie indicate lithospheric delamination, and/or high temperature, and partial melting condition.
WOS关键词CRUSTAL STRUCTURE BENEATH ; ULTRAHIGH-PRESSURE METAMORPHISM ; SUBDUCTED CONTINENTAL-CRUST ; LOWER YANGTZE-RIVER ; CENTRAL CHINA ; TECTONIC IMPLICATIONS ; UHP METAMORPHISM ; TIBETAN PLATEAU ; NW CHINA ; LITHOSPHERE-ASTHENOSPHERE
WOS研究方向Geology
语种英语
WOS记录号WOS:000394988300014
出版者SCIENCE PRESS
资助机构Strategic Priority Research Program (B) of the Chinese Academy of Sciences(XDB18030101) ; National Natural Science Foundation of China(41504069) ; Italian Projects PRIN ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences(XDB18030101) ; National Natural Science Foundation of China(41504069) ; Italian Projects PRIN ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences(XDB18030101) ; National Natural Science Foundation of China(41504069) ; Italian Projects PRIN ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences(XDB18030101) ; National Natural Science Foundation of China(41504069) ; Italian Projects PRIN
源URL[http://ir.iggcas.ac.cn/handle/132A11/53049]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Deng YangFan
作者单位1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Univ Trieste, Dept Math & Geosci, Via Weiss, I-34127 Trieste, Italy
5.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China
6.ISSO, Viale San Francesco 12, I-64031 Arsita, Italy
推荐引用方式
GB/T 7714		 Deng YangFan,Chen Lin,Xu Tao,et al. Lateral variation in seismic velocities and rheology beneath the Qinling-Dabie orogen[J]. SCIENCE CHINA-EARTH SCIENCES,2017,60(3):576-588.
APA Deng YangFan,Chen Lin,Xu Tao,Wu Jing,Romanelli, Fabio,&Panza, Giuliano Francesco.(2017).Lateral variation in seismic velocities and rheology beneath the Qinling-Dabie orogen.SCIENCE CHINA-EARTH SCIENCES,60(3),576-588.
MLA Deng YangFan,et al."Lateral variation in seismic velocities and rheology beneath the Qinling-Dabie orogen".SCIENCE CHINA-EARTH SCIENCES 60.3(2017):576-588.

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来源：地质与地球物理研究所

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