The oldest rocks and zircons in China.

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	The oldest rocks and zircons in China.
	Wan, Y (Wan YuSheng); Liu, D (Liu DunYi); Dong, C (Dong ChunYan); Nutman, A (Nutman, A.); Wilde, SA (Wilde, S. A.); Wang, W (Wang Wei); Xie, H (Xie HangQiang); Yin, X (Yin XiaoYan); Zhou, H (Zhou HongYing)
刊名	ACTA PETROLOGICA SINICA
	2009
卷号	25 期号:8 页码:1793-1807
关键词	Oldest rocks Oldest zircons Early crustal evolution in China Zircon dating Hf isotope
ISSN号	1000-0569
英文摘要	Zircons and rocks older than 3.4Ga have been discovered in many areas of Chinese continent. Anshan City is one of a few areas in the world where >= 3.8Ga continental rocks have been identified. They occur in volumetrically small amounts in the Baijiafen, Dongshan and Shengousi complexes and consist of mylonitized trondhjemite, banded trondhjemite and meta-quartz diorite. Many 3.7 similar to 3.6Ga rocks and zircons have also been found recently in the Anshan area. The Hf isotopes of the zircons indicate that Anshan mantle addition and continental formation happened episodically from 3.8 to 3.6Ga. Besides Anshan, >= 3.4Ga ages of zircons from different kinds of rocks in many areas of China have also been obtained, although most of them are detrital and inherited in origin. (1) 3.85 similar to 3.55Ga detrital zircons from Archaean fuchsite quartzite in eastern Hebei, North China Craton (NCC); (2) 3.66Ga magmatic zircons from felsic granulite xenoliths in Mesozoic volcanic rocks in Xinyang, NCC; (3) 3.80Ga detrital zircon (one grain) from Neoproterozoic sandstone in Yichang of the Yangtze Block, South China Craton (SCC); (4) 3.76 similar to 3.6Ga detrital zircons from Neoproterozoic-Palaeozoic meta-sedimentary rocks in the Cathaysia Block, SCC; (5) 3.6Ga inherited zircons from a Palaeoproterozoic gneissic granite in the Aketaslitage area, Tarim Block, Northwest of China. (6) A grain of 4.08Ga old zircon captured by an Ordovician meta-volcanic rock in Zhangjiazhuang, West of northern Qinling orogen; (7) One 4.1Ga detrital zircon (with 3.61Ga rim) from an Ordovician quartzite in Pulan, Tibet. Sonic of the ancient zircons have Hf isotope model ages as old as 4.1 similar to 4.0Ga. The proportion of > 3.4Ga crustal materials in China has been underestimated and there are new possibilities for finding Hadean and Eoarchean materials to constrain early terrestrial evolution.
学科主题	地质年代学
WOS关键词	SHRIMP U-PB ; ARCHEAN CRUSTAL EVOLUTION ; DETRITAL ZIRCONS ; GEOLOGICAL SIGNIFICANCE ; METASEDIMENTARY ROCKS ; ISOTOPIC CONSTRAINTS ; JIAODONG PENINSULA ; CONTINENTAL-CRUST ; VOLCANIC-ROCKS ; HENAN PROVINCE
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000269813000005
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38958]
专题	中国地质调查局
作者单位	China Geol Survey, Tianjin Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China
推荐引用方式 GB/T 7714	Wan, Y ,Liu, D ,Dong, C ,et al. The oldest rocks and zircons in China.[J]. ACTA PETROLOGICA SINICA,2009,25(8):1793-1807.
APA	Wan, Y .,Liu, D .,Dong, C .,Nutman, A .,Wilde, SA .,...&Zhou, H .(2009).The oldest rocks and zircons in China..ACTA PETROLOGICA SINICA,25(8),1793-1807.
MLA	Wan, Y ,et al."The oldest rocks and zircons in China.".ACTA PETROLOGICA SINICA 25.8(2009):1793-1807.