Research on the Mesozoic ocean-continent transitional zone in the Northeast Asia and its implications

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	Research on the Mesozoic ocean-continent transitional zone in the Northeast Asia and its implications
其他题名	Research on the Mesozoic ocean-continent transitional zone in the Northeast Asia and its implications
	Shao JiAn 1; Tang KeDong 2
	2015
发表期刊	ACTA PETROLOGICA SINICA
ISSN	1000-0569
卷号	31 期号:10 页码:3147-3154
摘要	A continental margin has been composed and transformed on the Asian continent as a unitary continental lithosphere plate since the Mesozoic. The Northeast Asia ocean-continent transitional zone is identified by the authors, according to the viewpoint of tectonostratigraphic terrane, as consisted of seven belts with different characters of biostratigraphy and collision orogenes (1) the east margin of the North China Craton reconstructed by Tanlu fault system; (2) accretion zone I dominated by nearly terrigenous materials; (3) accretion zone II dominated by heterologous melanges; (4) accretion zone III of the New Siberian-Chukotka-Alaska continental margin; (5) the volcano-plutonic zone of the continental margin; (6) accretion zone IV (the Koryak accretion zone); and (7) accretion zone V (Kamchatka-Sakhalin-Northeastern Japan accretion zone). Among those the Chukotka sea-East Sikhote-Alin volcano-plutonic zone, which is mainly of the Late Cretaceous, especially marks beginning of normal subduction of the Pacific plate and subsequent arc-magmatic activities. Early in the Late Triassic-Early Cretaceous, a large number of terranes migrated northward and joined together obliquely to the continental margin in a sinistral transcurrent faulting of the active transform margin. The evolution of the relative movements between the ocean and the continent in the Northeast Asia continental margin is clearly demonstrated by such a spatiotemporal pattern with its special zonation and periodicity. This study is used, jointly with recent results in related disciplines, to discussions of the relation between the Mesozoic magmatism in the eastern China with subduction of the Pacific plate. It is concluded that the peak period of the large-scale magmatism in the Late Jurassic-Early Cretaceous is in coincidence with period in which the ocean-continent transition zone is active and terranes accretion occurs in the Northeast Asia continental margin. As mentioned in this work, however, the normal subduction of Pacific Plate occurs in the end of the Early Cretaceous to the Late Cretaceous, when the large-scale magmatism has ended. It is, therefore, difficult to link the magmatic activities in eastern China with the subduction of the Pacific plate. Taking the Da Hinggan Mts. composed of young continental crust as an example, the authors suggest that the source characteristics of eastern China magmatism and its intrusive space are controlled by two geological processes in different depths in the Late Jurassic-Early Cretaceous simultaneously, i.e. the upwelling of deep diapers of asthenosphere and the deformation of the middle-upper crust subjected to shear strike-slip between the ocean and the continent.
关键词	CORDILLERA EVOLUTION PACIFIC RUSSIA BASIN MA Northeast Asia Mesozoic Ocean-continent transitional zone Transform margin Normal subduction
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:5540442
引用统计	被引频次：9[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/86488
专题	中国科学院金属研究所
作者单位	1.北京大学 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Shao JiAn,Tang KeDong. Research on the Mesozoic ocean-continent transitional zone in the Northeast Asia and its implications[J]. ACTA PETROLOGICA SINICA,2015,31(10):3147-3154.
APA	Shao JiAn,&Tang KeDong.(2015).Research on the Mesozoic ocean-continent transitional zone in the Northeast Asia and its implications.ACTA PETROLOGICA SINICA,31(10),3147-3154.
MLA	Shao JiAn,et al."Research on the Mesozoic ocean-continent transitional zone in the Northeast Asia and its implications".ACTA PETROLOGICA SINICA 31.10(2015):3147-3154.