Metamorphic P-T path and implications of high-pressure pelitic granulites from the Jiaobei massif in the Jiao-Liao-Ji Belt, North China Craton

doi:10.1016/j.gr.2011.09.006

	Metamorphic P-T path and implications of high-pressure pelitic granulites from the Jiaobei massif in the Jiao-Liao-Ji Belt, North China Craton
	Tam, Pui Yuk 1; Zhao, Guochun 1; Zhou, Xiwen 2; Sun, Min 1; Guo, Jinghui 3; Li, Sanzhong 4; Yin, Changqing 1; Wu, Meiling 1; He, Yanhong 5
刊名	GONDWANA RESEARCH
	2012-07-01
卷号	22 期号:1 页码:104-117
关键词	High-pressure pelitic granulites Petrology P-T path Paleoproterozoic Jiao-Liao-Ji Belt North China Craton
ISSN号	1342-937X
DOI	10.1016/j.gr.2011.09.006
文献子类	Article
英文摘要	High-pressure pelitic granulites have recently been found from the Jiaobei massif in the southern segment of the Jiao-Liao-Ji Belt (JLJB), which separates the Eastern Block of the North China Craton into the Longgang and Langrim Blocks. Petrological evidence from these high-pressure pelitic granulites indicates three distinct metamorphic stages (M1-M3). The pre-peak (M1) stage is represented by a mineral assemblage of garnet (core) + inclusion-type minerals within the garnet (biotite + kyanite + muscovite + plagioclase + quartz + ilmenite). The peak (M2) stage is marked by a mineral assemblage of garnet (mantle) + K-feldspar + kyanite + plagioclase + biotite + rutile + ilmenite + quartz. The post-peak (M3) stage is featured by a mineral assemblage of garnet (rim) + sillimanite + plagioclase + biotite + ilmenite + quartz. Using the THERMOCA-LAC technique, the NCKFMASHTO system has been applied to construct pseudosections for a representative high-pressure pelitic granulite sample. P-T conditions for the M1, M2 and M3 stages are constrained at 9.3-10.7 kbar/645-670 degrees C, 14.8-16.2 kbar/860-890 degrees C, and 6.3-8.5 kbar/710-740 degrees C, respectively. The mineral assemblages and P-T conditions of the high-pressure pelitic granulites define a clockwise P-T path involving decompression and cooling following the peak high-pressure granulite facies metamorphism. This suggests that the high-pressure pelitic granulites experienced the initial crustal thickening (M1 and M2), followed by exhumation and cooling (M3), which implies that the southern segment of the JLJB must have been involved in subduction- or collision-related tectonic processes. Therefore, the JLJB may represent another Paleoproterozoic collisional belt along which the Longgang and Langrim Blocks amalgamated to form the Eastern Block. (C) 2011 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
WOS关键词	PARTIAL MELTING EQUILIBRIA ; TEMPERATURE TIME PATHS ; MAJOR TECTONIC UNITS ; U-PB ; EASTERN BLOCK ; ZIRCON GEOCHRONOLOGY ; PALEOPROTEROZOIC EVOLUTION ; REGIONAL METAMORPHISM ; KEY ISSUES ; SUPERCONTINENT COLUMBIA
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000305106800008
资助机构	Hong Kong RGC GRF(HKU7057/08P) ; Hong Kong RGC GRF(HKU7057/08P) ; Chinese NSFC(41072152 ; Chinese NSFC(41072152 ; 40730315 ; 40730315 ; 40872123) ; 40872123) ; Hong Kong RGC GRF(HKU7057/08P) ; Hong Kong RGC GRF(HKU7057/08P) ; Chinese NSFC(41072152 ; Chinese NSFC(41072152 ; 40730315 ; 40730315 ; 40872123) ; 40872123) ; Hong Kong RGC GRF(HKU7057/08P) ; Hong Kong RGC GRF(HKU7057/08P) ; Chinese NSFC(41072152 ; Chinese NSFC(41072152 ; 40730315 ; 40730315 ; 40872123) ; 40872123) ; Hong Kong RGC GRF(HKU7057/08P) ; Hong Kong RGC GRF(HKU7057/08P) ; Chinese NSFC(41072152 ; Chinese NSFC(41072152 ; 40730315 ; 40730315 ; 40872123) ; 40872123)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84562]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhao, Guochun
作者单位	1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 2.Chinese Acad Geol Sci, Inst Geol, Nanjing, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100864, Peoples R China 4.Ocean Univ China, Dept Marine Geol, Qingdao 266003, Peoples R China 5.NW Univ Xian, Dept Geol, Xian 710069, Peoples R China
推荐引用方式 GB/T 7714	Tam, Pui Yuk,Zhao, Guochun,Zhou, Xiwen,et al. Metamorphic P-T path and implications of high-pressure pelitic granulites from the Jiaobei massif in the Jiao-Liao-Ji Belt, North China Craton[J]. GONDWANA RESEARCH,2012,22(1):104-117.
APA	Tam, Pui Yuk.,Zhao, Guochun.,Zhou, Xiwen.,Sun, Min.,Guo, Jinghui.,...&He, Yanhong.(2012).Metamorphic P-T path and implications of high-pressure pelitic granulites from the Jiaobei massif in the Jiao-Liao-Ji Belt, North China Craton.GONDWANA RESEARCH,22(1),104-117.
MLA	Tam, Pui Yuk,et al."Metamorphic P-T path and implications of high-pressure pelitic granulites from the Jiaobei massif in the Jiao-Liao-Ji Belt, North China Craton".GONDWANA RESEARCH 22.1(2012):104-117.