High-pressure metamorphism and anatexis during the subduction of Indian;continent: Phase equilibria modeling of the Namche Barwa complex,;Eastern Himalayan Syntaxis

	High-pressure metamorphism and anatexis during the subduction of Indian;continent: Phase equilibria modeling of the Namche Barwa complex,;Eastern Himalayan Syntaxis
	Xiang Hua 4; Zhang ZeMing ; Dong Xin ; Qi Min ; Lin YanHao 1; Lei HengCong 2
刊名	ACTA PETROLOGICA SINICA
	2013
卷号	29 期号:11 页码:3792-3802
关键词	High pressure granulite Phase equilibria modeling Anatexis Namche Barwa complex Himalayan orogeny Tibetan Plateau
ISSN号	1000-0569
英文摘要	The Namche Barwa complex (NBC) in Eastern Himalayan Syntaxis, is generally interpreted as a part of the Higher Himalayan Crystalline Series. The Namche Barwa complex experienced high pressure (HP) metamorphism during the deep subduction of the Indian continent beneath Eurasian continent. In this paper, based on petrology and mineral chemistry, phase equilibria modeling was carried out for high-pressure pelitic rocks of NBC. This results show that the pelitic rocks have suffered HP granulite facie metamorphism, with a peak-metamorphic assemblage of garnet + kyanite + biotite + plagioclase + k-feldspar + quartz + rutile, and a peak-metamorphic condition of similar to 820 degrees C and 13. 0 similar to 13. 5kb. This indicates the Indian continent subducted to more than 45km depth and formed the thickened lower crust of the Tibetan Plateau. This research also indicates the HP pelitic rocks have undergone dehydration melting of muscovite and biotite under HP granulite facies conditions, and may produce up to 27vo1% granitic melt, which may be the source of leucogranites in Himalayan orogeny. Thus, Qinghai-Tibet Plateau has a partly melted thickened lower crust, and provides advantageous rheological conditions for lateral flow.
学科主题	变质岩岩石学
WOS关键词	NORTH-SOUTH EXTENSION ; T-X CONSTRAINTS ; TECTONIC EVOLUTION ; CRUSTAL ; XENOLITHS ; CHANNEL FLOW ; ANATECTIC PARAGNEISSES ; GEOLOGIC EVOLUTION ; DUCTILE EXTRUSION ; NEPALESE HIMALAYA ; MELT EXTRACTION
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000328441300012
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40075]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China. 2.China Univ Geosci, Grad Sch, Wuhan 430074, Peoples R China. 3.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China. 4.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Xiang Hua,Zhang ZeMing,Dong Xin,et al. High-pressure metamorphism and anatexis during the subduction of Indian;continent: Phase equilibria modeling of the Namche Barwa complex,;Eastern Himalayan Syntaxis[J]. ACTA PETROLOGICA SINICA,2013,29(11):3792-3802.
APA	Xiang Hua,Zhang ZeMing,Dong Xin,Qi Min,Lin YanHao,&Lei HengCong.(2013).High-pressure metamorphism and anatexis during the subduction of Indian;continent: Phase equilibria modeling of the Namche Barwa complex,;Eastern Himalayan Syntaxis.ACTA PETROLOGICA SINICA,29(11),3792-3802.
MLA	Xiang Hua,et al."High-pressure metamorphism and anatexis during the subduction of Indian;continent: Phase equilibria modeling of the Namche Barwa complex,;Eastern Himalayan Syntaxis".ACTA PETROLOGICA SINICA 29.11(2013):3792-3802.