U-Pb ages of the zircons from primary rocks in middle-northern Daxinganling and its implications to geotectonic evolution.

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	U-Pb ages of the zircons from primary rocks in middle-northern Daxinganling and its implications to geotectonic evolution.
	She, HQ (She HongQuan); Li, JW (Li JinWen); Xiang, AP (Xiang AnPing); Guan, JD (Guan JiDong); Yang, YC (Yang YunCheng); Zhang, DQ (Zhang DeQuan); Tan, G (Tan Gang); Zhang, B (Zhang Bin)
刊名	ACTA PETROLOGICA SINICA
	2012
卷号	28 期号:2 页码:571-594
关键词	Daxinganling Zircon Isotope dating Granite Geotectonic evolution Continental collision
ISSN号	1000-0569
英文摘要	The age of single zircon is thought to be the recording of single tectonic, magmatic or metamorphism activity, the ages of a large amount of zircons got from different types of primary rocks should be able to indicate the geotectonic evolution history. The authors of the paper collected 2636 zircon ages determined by U-Pb dating from 123 samples in middle-northern Daxinganling, dated by authors or gatherd from published data, the statistics on these data has shown that the zircon ages have several peak value ages of 840 similar to 780Ma, 530 similar to 440Ma, 330 similar to 280Ma, 240 similar to 190Ma, 180 similar to 160Ma and 150 similar to 120Ma, and three blank time space of >840Ma, 770 similar to 540Ma, 440 similar to 400Ma. The ages of different types zircons generated by magmatism, metamorphism, or that inherited from former rocks have similar statistics features. The peak value of zircon ages has a good accordance with the time that important tectonic event took place in middle-northern Daxinganling Mountains, such as, the formation of basement, mircoplate subduction and collision. The blank period of zircon ages is corresponded to that of ocean spread or passive continental margin event. It is concluded that a large amount of zircon ages determined by U-Pb elating method for primary rocks also can be applied to study the geotectonic evolution history, just like the zircon ages from rivers detrita. Study on the statistics on zircon ages, granite association and tetonics indicates a very complicated tectonic evolution history has been taken place in middle-northern Daxinganling Mountain, that is, the formation of basement in Plaeoprotozoic, growth of continental crust in Neoprotozoic, breakdown of plate in the end of Neoprotozoic, subdution, spreading, accretion and collision between miroplates in Paleozoic, continental collision in Early Mesozoic, postorogenic extension and collapse in Late Mesozoic related to the Mongolia - Okhotsk orogeny and continental marginal tectonic-magmatic event related to the subdution of West Pacific Ocean in Mesozoic. The study has also shown that the Mongol-Okhostsk Ocecn has been closed in Late Triassic Period in Transbakal area. There is a large amount of granites, migmatites related to continental collision, and metaomorphic complex, basin-range, continental bimodal volcanic rocks related to postorogenic collapse, occurred in middle-northern Daxinganling. It is suggesting that the geodynamic background for the polymetal mineralizaton in the area need to be reconsidered.
学科主题	地质年代学
WOS关键词	MONGOL-OKHOTSK OCEAN ; GEOLOGICAL IMPLICATIONS ; TRACE-ELEMENT ; GRANITES ; HF ; DISCRIMINATION ; CONSTRAINTS ; PROVENANCE ; SUTURE ; REGION
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000301991500018
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39529]
专题	中国地质调查局
作者单位	Sixth Inst Geol & Mineral Resources Dev, Hailaer 021008, Peoples R China
推荐引用方式 GB/T 7714	She, HQ ,Li, JW ,Xiang, AP ,et al. U-Pb ages of the zircons from primary rocks in middle-northern Daxinganling and its implications to geotectonic evolution.[J]. ACTA PETROLOGICA SINICA,2012,28(2):571-594.
APA	She, HQ .,Li, JW .,Xiang, AP .,Guan, JD .,Yang, YC .,...&Zhang, B .(2012).U-Pb ages of the zircons from primary rocks in middle-northern Daxinganling and its implications to geotectonic evolution..ACTA PETROLOGICA SINICA,28(2),571-594.
MLA	She, HQ ,et al."U-Pb ages of the zircons from primary rocks in middle-northern Daxinganling and its implications to geotectonic evolution.".ACTA PETROLOGICA SINICA 28.2(2012):571-594.