IGGCAS OpenIR  > 地球与行星物理院重点实验室
Crustal structure beneath the southwestern Xing'an-Mongolia Orogenic Belt revealed by receiver function analysis
Zhang KaiWen1,2,3; Chen QiFu1,2,3; Chen Yun1,2,4
2020-04-01
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN0001-5733
Volume63Issue:4Pages:1484-1504
AbstractThe Xing' an-Mongolian Orogenic Belt (XMOB) is tectonically located in the area surrounded by the Siberian Craton to the north, the North China Craton to the south and the western Pacific Plate to the east. The tectonic evolution in the area was recognized closely related to the Paleo-Asian Ocean and Paleo-Pacific Ocean regimes during the Paleozoic-Early Mesozoic and related to the western Pacific Ocean and Mongol-Okhotsk Ocean regimes during and after the Mesozoic. Therefore, the XMOB is a key area to understand the NE Asian tectonic evolution and its tectonic transition from contractional thickened crust to extensional thinning. Several tectonic models, often conflicting, have been proposed to explain the evolution of the XMOB. The solution of such problems requires a better understanding of deep structure of the crust and mantle. In this study, we use the maximum entropy deconvolution method to obtain 24027 high-quality P-wave receiving function data recorded by our deployed temporary broadband seismic stations in the phase 3 of the NECsaids array, regional permanent stations and temporary stations from NECESSArray covering the southwestern XMOB. We applied the H-kappa and CCP stacking techniques and the joint inversion scheme to estimate crustal thickness (H), velocity ratio V-p/V-s (kappa) and crustal anisotropy (fast polarization direction phi and splitting time delta t). Our results show that the dominant directions of fast wave polarity in the study area are near NW and EW, which is consistent with the regional velocity field and the absolute plate motion direction, and it reveals that the crustal structure of the southwestern XMOB is dominated by the subducting western Pacific Plate. The Great Xing'an-Taihangshan or the North-South Gravity Lineament (NSGL) is an important transition zone of the southwestern XMOB crustal structure. The crustal thickness is generally high in the west side of the NSGL and low in the east side of the NSGL, while the average crustal velocity ratio (V-P/V-s) is low on both sides of the NSGL. Some stations with relative high V-P/V-s and complex anisotropic observations may represent regional fault influences and/or localized imprints of the Cenozoic volcanic activities such as the Shuangliao and Abaga volcanic cluster. The thickened crust and the complex anisotropic observations in the Erlian Basin may reflect the overprinting of the closure of the Paleo-Asian Ocean and the evolution process of the Mongolian-Okhotsk and the Paleo-Pacific tectonic regime.
KeywordXing'an-Mongolian Orogenic Belt Receiver functions Crustal anisotropy Crustal thickness V-P/V-s ratio
DOI10.6038/cjg2020N0048
WOS KeywordNORTH CHINA CRATON ; NE CHINA ; SEISMIC ANISOTROPY ; SOUTHERN CALIFORNIA ; POISSON RATIO ; VOLCANISM ; TOMOGRAPHY ; THICKNESS ; STACKING ; HISTORY
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000524071300019
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95551
Collection地球与行星物理院重点实验室
岩石圈演化国家重点实验室
Corresponding AuthorChen QiFu
Affiliation1.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
First Author AffilicationKey Laboratory of Earth and Planetary Physics, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Earth and Planetary Physics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang KaiWen,Chen QiFu,Chen Yun. Crustal structure beneath the southwestern Xing'an-Mongolia Orogenic Belt revealed by receiver function analysis[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(4):1484-1504.
APA Zhang KaiWen,Chen QiFu,&Chen Yun.(2020).Crustal structure beneath the southwestern Xing'an-Mongolia Orogenic Belt revealed by receiver function analysis.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(4),1484-1504.
MLA Zhang KaiWen,et al."Crustal structure beneath the southwestern Xing'an-Mongolia Orogenic Belt revealed by receiver function analysis".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.4(2020):1484-1504.
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