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  4. 岩石圈演化国家重点实验室
Late Triassic contractional tectonics in the overriding plate of the Sulu orogenic belt, Eastern China

文献类型：期刊论文

作者Meng, Lingtong1,2; Lin, Wei1,2
刊名TECTONOPHYSICS
出版日期2021-05-05
卷号806页码:19
关键词Overriding plate Structural analysis Anisotropy of magnetic susceptibility Ar-40/Ar-39 geochronology Sulu orogenic belt
ISSN号0040-1951
DOI10.1016/j.tecto.2021.228793
英文摘要It is well known that the Dabie-Sulu orogenic belt resulted from the northward continental subduction of the South China Block (SCB) beneath the North China Block (NCB) during the Triassic. Correlating the deformation events recorded in the subducted and overriding plates is essential to understand its tectonic evolution, but related deformation is poorly documented in the overriding plate. In this contribution, we present detailed structural analysis, anisotropy of magnetic susceptibility (AMS), and geochronological data in the Linsishan unit of the Jiaobei massif, the overriding plate of the Sulu orogenic belt. The Linsishan unit preserves a significant ductile deformation characterized by NNW-, NE-, or SE-dipping foliations with NE-SW trending mineral lineations. Coupling mesoscopic and magnetic fabrics augment the NE-SW linear structures. The NE-dipping monoclinal structures with top-to-SW kinematics could be interpreted as a SW-directed thrusting, the deformation temperature of which is 350-450 degrees C according to the quartz c-axis fabrics. The timing of deformation is constrained to be 223-221 Ma based on Ar-40/Ar-39 dating of the deformed rocks and linked with a syn-collisional stage in the Sulu omgenic belt. Combining these new results with previous works, we propose a three-stage evolution model for the Sulu orogenic belt, namely (1) subducted SCB experienced ultra-high pressure (UHP) metamorphism before 230 Ma; (2) SW-directed thrusting was developed in the overriding plate, coeval with the syn-collisional exhumation of UHP rocks during 230-220 Ma; (3) post-collisional migmatization, magmatism, extension, and UHP rocks exhumation took place at 220-205 Ma.
WOS关键词ULTRAHIGH-PRESSURE METAMORPHISM ; MAFIC-ULTRAMAFIC BODIES ; LIAO-JI BELT ; NORTH CHINA ; SOUTH CHINA ; UHP TERRANE ; MAGNETIC FABRICS ; JIAODONG PENINSULA ; SHEAR ZONE ; CONTINENTAL-CRUST
资助项目National Natural Science Foundation of China[91855212] ; National Key R&D Program of China[2016YFC0600102] ; National Key R&D Program of China[2016YFC0600401]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000674648200003
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/101956]  
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Lin, Wei
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Meng, Lingtong,Lin, Wei. Late Triassic contractional tectonics in the overriding plate of the Sulu orogenic belt, Eastern China[J]. TECTONOPHYSICS,2021,806:19.
APA Meng, Lingtong,&Lin, Wei.(2021).Late Triassic contractional tectonics in the overriding plate of the Sulu orogenic belt, Eastern China.TECTONOPHYSICS,806,19.
MLA Meng, Lingtong,et al."Late Triassic contractional tectonics in the overriding plate of the Sulu orogenic belt, Eastern China".TECTONOPHYSICS 806(2021):19.

入库方式： OAI收割

来源：地质与地球物理研究所

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