气候变化领域集成服务门户(CCPortal): Triassic–Jurassic evolution of the eastern North China Craton: Insights from the Lushun-Dalian area, South Liaodong Peninsula, NE China

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DOI	10.1130/B35533.1
	Triassic–Jurassic evolution of the eastern North China Craton: Insights from the Lushun-Dalian area, South Liaodong Peninsula, NE China
	Ren Z.; Lin W.; Meng L.; Qiu H.; Zeng J.; Zeng J.
发表日期	2020
ISSN	167606
起始页码	393
结束页码	408
卷号	133
英文摘要	The Lushun-Dalian area of the Liaodong Peninsula, in NE China, located in the SE margin of the North China Craton (NCC) exposes a suite of Middle-Late Proterozoic low-grade metamorphic sedimentary rocks which can be divided into a lower competent layer, a middle layer, and an upper competent layer on the basis of lithology and deformation style.Two stages of deformation recorded both in the metasedimentary rocks and a complex intruded in them indicate that Lushun-Dalian area is a key region to the Triassic– tectonic evolution of the eastern NCC. The earliest D1 mylonitized the magmatic complex and thrusted it northeastward over the lowgrade metasedimentary rocks, in which a series of NE-verging folds and NE-directed brittle thrust faults developed. The D2 deformation erased the D1 fabrics in the layer by a top-to-the-NW ductile shearing and refolded the D1 fabrics in the lower and upper competent units, producing a series of km-scale SW-plunging folds. New zircon secondary ion mass spectrometry and laser ablation–inductively coupled plasma–mass spectrometry U-Pb ages fromthe magmatic complex and the granite porphyry dikes intruded in it, the unconformity between the low- metasedimentary rocks and the Early Cretaceous volcanic rocks, indicate and D2 occurred after 211 Ma and before the Early Cretaceous. The decrease of deformation intensity of D1 and D2 from Dalian area toward the interior of the NCC in the NE and NW directions suggests that D1 was the structural response in the overriding plate to the NCC-South ChinaBlock convergence during the Late to Early Jurassic, and D2 was the structural response to the northwestward subduction of the Paleo–Pacific plate beneath the NCC in the Middle-Late Jurassic. The superimposition of D2 on D1 recorded a significant tectonic transformation from the nearly E-W–trending Tethysian domain to the NE-SW–trending Pacific domain. © 2020 Geological Society of America
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/184848
作者单位	State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029, China; SinoProbe Center, Chinese Academy of Geological Sciences, Beijing, 100037, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Institut des Sciences de la Terre d’Orléans, Université d’Orléans, UMR 7327, 1A Rue de la Férollerie, Orléans Cedex 2, 45071, France
推荐引用方式 GB/T 7714	Ren Z.,Lin W.,Meng L.,等. Triassic–Jurassic evolution of the eastern North China Craton: Insights from the Lushun-Dalian area, South Liaodong Peninsula, NE China[J],2020,133.
APA	Ren Z.,Lin W.,Meng L.,Qiu H.,Zeng J.,&Zeng J..(2020).Triassic–Jurassic evolution of the eastern North China Craton: Insights from the Lushun-Dalian area, South Liaodong Peninsula, NE China.Bulletin of the Geological Society of America,133.
MLA	Ren Z.,et al."Triassic–Jurassic evolution of the eastern North China Craton: Insights from the Lushun-Dalian area, South Liaodong Peninsula, NE China".Bulletin of the Geological Society of America 133(2020).