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Strain analysis of the Xuefengshan Belt, South China: From internal strain variation to formation of the orogenic curvature
Chu, Yang1,2; Lin, Wei1,2
2018-11-01
发表期刊JOURNAL OF STRUCTURAL GEOLOGY
ISSN0191-8141
卷号116页码:131-145
摘要The Early Mesozoic Xuefengshan Belt, located in the central part of the South China Block, East Asia, developed as an intracontinental belt during the Middle Triassic. Analyses of structural and strain patterns in Neoproterozoic conglomerates constrain the internal deformation and three-dimensional kinematic evolution of this fold-and-thrust belt. Finite strain data (R-XZ) range from 1.1 to 3.2 and generally increase eastwards towards the deep units of the orogenic core. Our results also show that at basal decollement zone the D-1 schistosity-forming deformation has a gradient of stronger fabrics, higher strain ratios, and a dominant thrust-normal flattening mechanism. High tectonic levels exhibit lower strain ratios and later structural overprinting that locally modified the D-1 strain patterns. Parallel to the belt, enhanced strain and tectonic uplifting along the northern and southern sections of the belt indicate an along-strike structural variation that corresponds to the formation of the orogenic curvature. During the thrusting propagation, large igneous intrusions escaped deformation due to their stiffness and facilitated strain accumulation on the peripheries, whereas stress in the central part migrated progressively and formed a tectonic salient towards the west without significant strain localization.
关键词South China Xuefengshan belt Finite strain Strain gradient Orogenic curvature
DOI10.1016/j.jsg.2018.08.002
资助者Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
关键词[WOS]FINITE STRAIN ; THRUST BELT ; ZIRCON AGES ; SHEAR ZONE ; BLOCK ; CONSTRAINTS ; TECTONICS ; EVOLUTION ; DEFORMATION ; SUBDUCTION
语种英语
资助项目Ministry of Science and Technology of the People's Republic of China[2016YFC0600401] ; Ministry of Science and Technology of the People's Republic of China[2016YFC0600102] ; National Natural Science Foundation of China[418722208] ; National Natural Science Foundation of China[41472193] ; National Natural Science Foundation of China[41302161]
资助者Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000447570000009
出版者PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/90214
专题岩石圈演化国家重点实验室
通讯作者Chu, Yang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
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Chu, Yang,Lin, Wei. Strain analysis of the Xuefengshan Belt, South China: From internal strain variation to formation of the orogenic curvature[J]. JOURNAL OF STRUCTURAL GEOLOGY,2018,116:131-145.
APA Chu, Yang,&Lin, Wei.(2018).Strain analysis of the Xuefengshan Belt, South China: From internal strain variation to formation of the orogenic curvature.JOURNAL OF STRUCTURAL GEOLOGY,116,131-145.
MLA Chu, Yang,et al."Strain analysis of the Xuefengshan Belt, South China: From internal strain variation to formation of the orogenic curvature".JOURNAL OF STRUCTURAL GEOLOGY 116(2018):131-145.
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