SHRIMP U-Pb dating and Hf isotopic analyses of zircons from the mafic dyke swarms in central Qiangtang area, Northern Tibet

CORC > 中国地质调查局 > 中国地质调查局

	SHRIMP U-Pb dating and Hf isotopic analyses of zircons from the mafic dyke swarms in central Qiangtang area, Northern Tibet
	Zhai, QG (Zhai QingGuo); Li, C (Li Cai); Wang, J (Wang Jun); Ji, ZS (Ji ZhanSheng); Wang, Y (Wang Yong)
刊名	CHINESE SCIENCE BULLETIN
	2009
卷号	54 期号:13 页码:2279-2285
关键词	Northern Tibet Qiangtang mafic dyke swarm SHRIMP dating Hf isotope
ISSN号	1001-6538
英文摘要	In the "Central Uplift" of Qiangtang, Northern Tibet, a large scale of mafic dyke swarms extended in E-W direction. Zircon SHRIMP U-Pb dating on two representative samples of diabase dyke yield weighted mean ages of 284 +/- 3 Ma and 302 +/- 4 Ma, respectively, suggesting they emplaced in the Late Carboniferous to Early Permian. Zircon (176)Hf/(177)Hf ratios range from 0.282852 to 0.283041, with epsilon (Hf)(t) values of +12.1 to +12.2 and Hf modal (T (DM)) ages of _440-460 Ma. These data indicate that these mafic dykes were mainly derived from the depleted mantle. In addition, geochemical data suggest that these mafic dyke swarms are of intra-plate origin. Therefore, the mafic dyke swarms represent products during the extensional process associated with the opening of the Paleo-Tethys Ocean in the area.
学科主题	地质年代学
WOS关键词	GEOCHRONOLOGY ; ROCKS ; CHINA ; AGE
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000267669100020
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38971]
专题	中国地质调查局
作者单位	Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China
推荐引用方式 GB/T 7714	Zhai, QG ,Li, C ,Wang, J ,et al. SHRIMP U-Pb dating and Hf isotopic analyses of zircons from the mafic dyke swarms in central Qiangtang area, Northern Tibet[J]. CHINESE SCIENCE BULLETIN,2009,54(13):2279-2285.
APA	Zhai, QG ,Li, C ,Wang, J ,Ji, ZS ,&Wang, Y .(2009).SHRIMP U-Pb dating and Hf isotopic analyses of zircons from the mafic dyke swarms in central Qiangtang area, Northern Tibet.CHINESE SCIENCE BULLETIN,54(13),2279-2285.
MLA	Zhai, QG ,et al."SHRIMP U-Pb dating and Hf isotopic analyses of zircons from the mafic dyke swarms in central Qiangtang area, Northern Tibet".CHINESE SCIENCE BULLETIN 54.13(2009):2279-2285.