Structural analysis and deformation characteristics of the Yingba   metamorphic core complex, northwestern margin of the North China craton,   NE Asia

doi:10.1016/j.jsg.2016.11.011

CORC > 北京大学 > 地球与空间科学学院

	Structural analysis and deformation characteristics of the Yingba metamorphic core complex, northwestern margin of the North China craton, NE Asia
	Yin, Congyuan ; Zhang, Bo ; Han, Bao-Fu ; Zhang, Jinjiang ; Wang, Yang ; Ai, Sheng
刊名	JOURNAL OF STRUCTURAL GEOLOGY
	2017
关键词	North China craton Metamorphic core complex Microstructures Two-feldspar geothermometry Quartz fabrics Vorticity PRESSURE CONTINENTAL-CRUST STEADY-STATE DEFORMATIONS MINIMUM STRAIN PATH RIVER SHEAR ZONE VORTICITY ANALYSIS EASTERN CHINA EXTENSIONAL TECTONICS GEOCHRONOLOGICAL CONSTRAINTS PREFERRED ORIENTATIONS PLASTIC-DEFORMATION
DOI	10.1016/j.jsg.2016.11.011
英文摘要	The presence of the Yingba (Yinggete Bagemaode) metamorphic core complex (MCC) is confirmed near the Sino-Mongolian border in China. We report its structural evolution and the rheological features of ductile shear zones within this complex. Three deformations (Ds, Dm, and Db) since the Late Jurassic are identified. Ds is characterized by ductile structures that resulted from early NW-oriented, low-angle, extensional ductile shearing. Dm is associated with partial melting and magmatic diapirism, which accelerated the formation of the dome-like geometry of the Yingba MCC. Synchronously with or slightly subsequently to Ds and Dm, the Yingba MCC was subjected to brittle, extensional faulting (Db), which was accompanied by the exhumation of the lower crust and the formation of supracrustal basins. The ductile shearing (Ds) developed under greenschist-to amphibolite-facies metamorphic conditions (400 -650 degrees C), as indicated by microstructures in quartz and feldspar, quartz [c] axis fabrics, and two-feldspar geothermometry. The mean kinematic vorticity estimates of 48-62% show a pure shear-preferred flow during Ds. The Yingba MCC provides an excellent sample that recorded an intermediate to high temperature shearing, which also implies the widely extensional regime in northeastern Asia at that time. (C) 2016 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [41422206]; Ministry of Science and Technology of China [2013CB429806]; SCI(E); ARTICLE; 195-212; 94
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/476380]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Yin, Congyuan,Zhang, Bo,Han, Bao-Fu,et al. Structural analysis and deformation characteristics of the Yingba metamorphic core complex, northwestern margin of the North China craton, NE Asia[J]. JOURNAL OF STRUCTURAL GEOLOGY,2017.
APA	Yin, Congyuan,Zhang, Bo,Han, Bao-Fu,Zhang, Jinjiang,Wang, Yang,&Ai, Sheng.(2017).Structural analysis and deformation characteristics of the Yingba metamorphic core complex, northwestern margin of the North China craton, NE Asia.JOURNAL OF STRUCTURAL GEOLOGY.
MLA	Yin, Congyuan,et al."Structural analysis and deformation characteristics of the Yingba metamorphic core complex, northwestern margin of the North China craton, NE Asia".JOURNAL OF STRUCTURAL GEOLOGY (2017).