Two types of metamorphism and their relationships with granites in the;Mashan Complex

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	Two types of metamorphism and their relationships with granites in the;Mashan Complex
	Ren LiuDong 4; Wang YanBin ; Yang ChongHui ; Zhao ZiRan ; Guo JinJing ; Gao HongLin
刊名	ACTA PETROLOGICA SINICA
	2012
卷号	28 期号:9 页码:2855-2865
关键词	Metamorphism Granite Zircon ages Mashan Complex East Antarctica Gondwana
ISSN号	022HC
英文摘要	Two types of metamorphism have been discerned from the Mashan Complex in the Jiamusi Block, Heilongjiang Province, northeastern China. The local earlier granulite facies metamorphism (M-1) was accompanied by fluid-absent anatexis (>530Ma). The subsequent widespread magmatism was responsible for the intensive migmatization (500Ma) and corresponding late amphibolite facies metamorphism (M-2). The former is actually the high grade Mashan Group (s.s.) and the metamorphic rocks are dominated by residual massives or enclaves scattered in late migmatitic granites. The change from amphibolite to granulite facies is not transitional or progressive, suggesting the great difference of the two kinds of metamorphism. The migmatization was probably fluid-rich and made substantial retrograded alteration to the earlier "dry" metamorphics, accounting for the complicated textures of the rocks. In addition, the emplacement of the fluid-bearing granites may reset the U-Pb system of the zircons formed in earlier high-grade metamorphism and the real metamorphic ages could be hardly measured. For the metamorphism-granite sequence, the Mashan Complex is rather similar to that of the Prydz Bay belt of East Antarctica. In both areas the deformation-metamorphism were closely followed by granites. The difference is that the intensity of late granitization varies in the two areas. Along the southern margin of the Siberian Craton and some microcontinents in the Central Asian belt occurred some tectono-thermal-magmatic events similar to that around the Gondwana margin. That is to say, the Jiamusi Block and other analogues in the Central Asian belt are tectonically similar to the Pan-African belts in the Gondwana, though they may belong to different domains in ancient continent configuration.
学科主题	变质岩岩石学
WOS关键词	NORTH CHINA CRATON ; U-PB AGES ; EAST ANTARCTICA ; TECTONIC IMPLICATIONS ; JIAMUSI MASSIF ; NORTHEASTERN CHINA ; MELT EXTRACTION ; OLKHON TERRANE ; FUPING COMPLEX ; PRYDZ BAY
WOS研究方向	Geology
语种	中文
WOS记录号	WOS:000309947500015
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39648]
专题	中国地质调查局天津地质调查中心
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China. 2.Tianjin Inst Urban Construct, Tianjin 300384, Peoples R China. 3.Peking Univ, Sch Earth & Space Sci, Beijing 100871, 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	Ren LiuDong,Wang YanBin,Yang ChongHui,et al. Two types of metamorphism and their relationships with granites in the;Mashan Complex[J]. ACTA PETROLOGICA SINICA,2012,28(9):2855-2865.
APA	Ren LiuDong,Wang YanBin,Yang ChongHui,Zhao ZiRan,Guo JinJing,&Gao HongLin.(2012).Two types of metamorphism and their relationships with granites in the;Mashan Complex.ACTA PETROLOGICA SINICA,28(9),2855-2865.
MLA	Ren LiuDong,et al."Two types of metamorphism and their relationships with granites in the;Mashan Complex".ACTA PETROLOGICA SINICA 28.9(2012):2855-2865.