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Episodic Crustal Extension and Contraction Characterizing the Late Mesozoic Tectonics of East China: Evidence From the Jiaodong Peninsula, East China

文献类型：期刊论文

作者Meng, Lingtong1,2; Lin, Wei1,2
刊名TECTONICS
出版日期2021-03-01
卷号40期号:3页码:36
关键词anisotropy of magnetic susceptibility East China geodynamics gravity modeling granitic pluton structural analyses intracontinental deformation
ISSN号0278-7407
DOI10.1029/2020TC006318
英文摘要During the Late Mesozoic, East China is characterized by widespread magmatism, thrusting and folding, extensional doming, strike-slip faulting, and block rotation. The Jiaodong Peninsula provides a key area located in East China to understand the episodic intracontinental extension and contraction and associated granitoid emplacement. Based on our structural analysis, magnetic fabric measurement, and gravity modeling, polyphase deformation and magma emplacement have been recognized within the Queshan-Kunyushan-Yuangezhuang-Sanfoshan (QKYS) massif of the central Jiaodong Peninsula. A significant Late Jurassic D-1 event, developed in the northern margin of the massif, was expressed by a high-temperature, top-to-the-NE shearing. Late Jurassic plutons display magnetic fabrics corresponding to the D-1 structural fabrics and several NW-SE-trending feeder zones at depth. These results link the syn-kinematic emplacement of Late Jurassic plutons with regional NE-SW extensional tectonics. In the south of the massif, a lower-temperature, top-to-the-SW contractional deformation (D-2) resulted from NE-SW contraction. The D-3 shear zone with a top-to-the-WNW kinematics is a rolling-hinge type detachment fault that exhumed the massif, indicating NW-SE regional extension. Finally, Early Cretaceous plutons emplaced into the upper crust with a fast-cooling rate and formed inverted drop shapes with concentric magnetic foliations and variably oriented magnetic lineations. In light of the previous geochronological results, the timing of these tectonic events is discussed. The tectonic evolution of the QKYS massif indicates a process from crustal thickening to lithospheric foundering in response to the Late Mesozoic plate convergences.
资助项目National Key R&D Program of China[2016YFC0600102] ; National Natural Science Foundation of China[91855212]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000636359100007
出版者AMER GEOPHYSICAL UNION
资助机构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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/101109]  
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.Chinese Acad Sci, Innovat Acad Earth 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
推荐引用方式
GB/T 7714		 Meng, Lingtong,Lin, Wei. Episodic Crustal Extension and Contraction Characterizing the Late Mesozoic Tectonics of East China: Evidence From the Jiaodong Peninsula, East China[J]. TECTONICS,2021,40(3):36.
APA Meng, Lingtong,&Lin, Wei.(2021).Episodic Crustal Extension and Contraction Characterizing the Late Mesozoic Tectonics of East China: Evidence From the Jiaodong Peninsula, East China.TECTONICS,40(3),36.
MLA Meng, Lingtong,et al."Episodic Crustal Extension and Contraction Characterizing the Late Mesozoic Tectonics of East China: Evidence From the Jiaodong Peninsula, East China".TECTONICS 40.3(2021):36.

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来源：地质与地球物理研究所

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