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DOI	10.1130/B31904.1
	Geodynamics of the Indosinian orogeny between the South China and Indochina blocks: Insights from latest Permian- Triassic granitoids and numerical modeling
	Liu H.; Wang Y.; Li Z.; Zi J.-W.; Huangfu P.
发表日期	2018
ISSN	167606
起始页码	1289
结束页码	1306
卷号	130 期号:2021-07-08
英文摘要	The Indosinian orogeny experienced multiple subduction-collisional events along the Jinshajiang-Ailaoshan-Song Ma tectonic zone in response to closure of the Paleotethyan Ocean/back-arc basin, but the associated geodynamic processes are still poorly understood. Granitic rocks are the most common magmatic products in collisional orogens, and they can provide important information about orogenic geodynamics. In this study, three stages of collision-related igneous activity were identified along the Jinshajiang- Ailaoshan-Song Ma suture zone: (1) Latest Permian to earliest Triassic (ca. 255-248 Ma) high-εHf(t) and high-εNd(t) I-type granites, low-εNd(t) and low-εHf(t) I-type granites, and S-type granites; (2) Early to Middle Triassic (247-237 Ma) S-type leucogranites and high- Si peraluminous rhyolites; and (3) Late Triassic (ca. 235-202 Ma) high-εNd(t) and high- εHf(t) I-type granites, low-εNd(t) and low-εHf(t) I-type granodiorites, and S-type granites. A synthesis of the data for the latest Permian to Triassic magmatic and coeval high-pressure and ultrahigh-pressure metamorphic rocks suggests a three-stage model for the convergence between the Simao-Indochina and South China blocks. Termination of arc magmatism and commencement of continental collision occurred in the latest Permian-earliest Triassic (ca. 255-248 Ma), followed by continental subduction in the Early to Middle Triassic (247-237 Ma) and Late Triassic postcollisional slab breakoff and conticontinental exhumation (ca. 235-202 Ma). A two-dimensional high-resolution numerical model reproduced this evolutionary process and revealed the lateral structural heterogeneity of the subducting and overriding plates during the Indosinian orogeny. © 2018 The Authors.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185006
作者单位	Guangdong Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Key Laboratory of Computational Geodynamics, College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Department of Applied Geology, Curtin University, Perth, 6102, Australia
推荐引用方式 GB/T 7714	Liu H.,Wang Y.,Li Z.,et al. Geodynamics of the Indosinian orogeny between the South China and Indochina blocks: Insights from latest Permian- Triassic granitoids and numerical modeling[J],2018,130(2021-07-08).
APA	Liu H.,Wang Y.,Li Z.,Zi J.-W.,&Huangfu P..(2018).Geodynamics of the Indosinian orogeny between the South China and Indochina blocks: Insights from latest Permian- Triassic granitoids and numerical modeling.Bulletin of the Geological Society of America,130(2021-07-08).
MLA	Liu H.,et al."Geodynamics of the Indosinian orogeny between the South China and Indochina blocks: Insights from latest Permian- Triassic granitoids and numerical modeling".Bulletin of the Geological Society of America 130.2021-07-08(2018).