Metamorphism of mafic granulites in the Grove Mountains, East Antarctica

	Metamorphism of mafic granulites in the Grove Mountains, East Antarctica
	Yu, LJ ; Liu, XH ; Zhao, Y ; Ju, YT ; Liu, XC
刊名	ACTA PETROLOGICA SINICA
	2002-10-01
卷号	18 期号:4 页码:501-516
关键词	mafic granulite ITD high-pressure granulite Grove Mountains East Antarctica
ISSN号	1000-0569
文献子类	Article
英文摘要	Mafic granulites and amphibolites crop out in the Grove Mountains (GMs), 450km south of Zhongshan Station on the coast of Prydz Bay, East Antarctica. Most metamorphic reaction textures suggest that the high-grade metamorphic rocks were formed by a single-granulite facies event. But, the garnet-bearing mafic granulites exhibit corona of Opx + Pl + minor Hbl on garnet, formed after peak metamorphic conditions (M-1), The corona was originated during a second metamorphic event (M-2) via the reaction Grt + Cpx + SiO2 = Opx + Pl. The mafic granulite shows a near-isothermal decompression (ITD) P-T history from 0.93 GPa and >800degreesC (M-1) based on the assemblage of garnet core with Cpx-Pl-Qtz occurred as inclusion within. the garnet to 0.65GPa and 733 similar to 850degreesC (M-2), followed by 0.46 similar to 0.61 GPa (M-3). Conventionally, this clockwise P-T path can be explained in a model involving extensional collapse and exhumation of thickened crust, which can be compared with that of Larsemann Hills East Antarctica. Based on metamorphic temperatures and pressures estimated by geothermometer - geobarometer, we proposed that the mafic granulite from Grove Mountains, East Antarctica, might be the high-pressure granulite.
WOS关键词	PRYDZ BAY AREA ; LARSEMANN-HILLS ; CONTINENTAL-CRUST ; RAUER GROUP ; PRESSURE ; GARNET ; TEMPERATURE ; EVOLUTION ; PATHS ; ROCKS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000179484500009
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/78023]
专题	中国科学院地质与地球物理研究所
通讯作者	Yu, LJ
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, LTE Lab, Beijing 100029, Peoples R China 2.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Yu, LJ,Liu, XH,Zhao, Y,et al. Metamorphism of mafic granulites in the Grove Mountains, East Antarctica[J]. ACTA PETROLOGICA SINICA,2002,18(4):501-516.
APA	Yu, LJ,Liu, XH,Zhao, Y,Ju, YT,&Liu, XC.(2002).Metamorphism of mafic granulites in the Grove Mountains, East Antarctica.ACTA PETROLOGICA SINICA,18(4),501-516.
MLA	Yu, LJ,et al."Metamorphism of mafic granulites in the Grove Mountains, East Antarctica".ACTA PETROLOGICA SINICA 18.4(2002):501-516.