Zircon SHRIMP U-Pb dating for the Cangshuipu volcanic rocks and its;implications for the lower boundary age of the Nanhua strata in South;China

doi:10.1360/03wd0168

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	Zircon SHRIMP U-Pb dating for the Cangshuipu volcanic rocks and its;implications for the lower boundary age of the Nanhua strata in South;China
	Wang, J 6; Li, XH ; Duan, TZ ; Liu, DY ; Song, B ; Li, ZX ; Gao, YH
刊名	CHINESE SCIENCE BULLETIN
	2003
卷号	48 期号:16 页码:1663-1669
关键词	Zicon U-Pb dating Neoproterozoic volcanics rift basin Nantma System
ISSN号	1001-6538
DOI	10.1360/03wd0168
英文摘要	The continental volcanic rocks and volcaniclastic sedimentary conglomerates of the Cangshuipu Formation occur well in Yiyang of Hunan Province, consisting of a wedge-shaped succession of Neoproterozoic strata that overlie with high-angle unconformity the flysch turbidites of the Lengjiaxi Group in the Upper Mesoproterozoic Eonothem. SHRIMP zircon U-Pb dating gives a weighted mean age of 814 +/- 12 Ma for the dacitic volcanic agglomerates from the lowest part of the volcanic rocks in the Cangshuipu Formation. This age is younger than previously reported values of 921-933 Ma for the volcanic rocks from the Cangshuipu Formation. Our new dating represents the lower boundary age of the Neoproterozoic System in the studied area. The younger age for the Cangshuipu volcanic rocks is supported by the following observations: (1) Lower Neoproterozoic strata (814-1000 Ma) are missing in the studied area; (2) the Nanhua rift system was initiated at about 820 Ma; and (3) an age of similar to820 Ma may be taken as the lower boundary timing of the Nanhua System (even Neoproterozoic) in South China.
学科主题	火成岩岩石学
WOS关键词	YANGTZE CRATON ; MANTLE PLUME ; RODINIA ; RIFT ; GEOCHRONOLOGY ; BASINS
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000185218200003
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37557]
专题	中国地质调查局成都地质调查中心
作者单位	1.China Geol Survey, Chengdu Inst Geol & Mineral Resources, Chengdu 610082, Peoples R China. 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China. 3.Colorado Sch Mines, Golden, CO 80401 USA. 4.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China. 5.Chinese Acad Geol Sci, Grad Sch, Beijing 100037, Peoples R China. 6.中国地质调查局成都地质调查中心
推荐引用方式 GB/T 7714	Wang, J,Li, XH,Duan, TZ,et al. Zircon SHRIMP U-Pb dating for the Cangshuipu volcanic rocks and its;implications for the lower boundary age of the Nanhua strata in South;China[J]. CHINESE SCIENCE BULLETIN,2003,48(16):1663-1669.
APA	Wang, J.,Li, XH.,Duan, TZ.,Liu, DY.,Song, B.,...&Gao, YH.(2003).Zircon SHRIMP U-Pb dating for the Cangshuipu volcanic rocks and its;implications for the lower boundary age of the Nanhua strata in South;China.CHINESE SCIENCE BULLETIN,48(16),1663-1669.
MLA	Wang, J,et al."Zircon SHRIMP U-Pb dating for the Cangshuipu volcanic rocks and its;implications for the lower boundary age of the Nanhua strata in South;China".CHINESE SCIENCE BULLETIN 48.16(2003):1663-1669.