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	Studies on the U-Pb ages and Hf isotopes of zircons in the Aoyitake plagioclase granite, west Tarim.
	Li GuangWei; Fang AiMin; Wu FuYuan; Liu XiaoHan; Pan YuSheng; Wang ShiGang
通讯作者	Li, GW (通讯作者)
发表日期	2009
ISSN	1000-0569
EISSN	2095-8927
起始页码	166
结束页码	172
卷号	25 期号:1
英文摘要	In situ U-Pb ages and I-If isotopes of Aoyitake plagioclase granite in west Kunlun were analyzed on the basis of mircro-district studies upon zircons selected from two samples. Zircon U-Pb ages of the two samples are 337.5 +/- 6.5Ma and 339.2 +/- 6.5Ma, respectively with their Th/U ratio of 0.3 similar to 1.0, which is consistent with the SHRIMP ages tested by Zhang et al. ( 2006). The Aoyitake plagioclase granite zircons, with their Hf-176/Hf-177 ratios varying in 0.2829 similar to 0.2831, have high positive epsilon(Hf) (12 similar to 17) and depleted mantle model ages (averaged at 359.1 Ma), which is almost equal to their U-Pb ages. In the Hf-176/Hf-177-epsilon(Hf) discrimation diagrams, these zircons were plotted on the depleted mantle evolution line, indicating that this granite was derived from the new basaltic lower crust which is originated from depleted mantle, through a series of crystallization differentiations. Compared with current data from studies on the layered complex mass in Bachu- Kashgar zone, Aoyitake granite bears similar characteristics of its primary magma with the former, which were supposed to be originated from partial melting of the young basaltic lower crust related to the mantle plume action during the carboniferous Tianshan rift period.
关键词	LU-HF KUNLUN RANGE SYSTEMATICS SUBDUCTION INSIGHTS GROWTH
英文关键词	Western Tarim; Aoyitake plagioclase granite; U-Pb dating and Hf isotope
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:000264381800014
来源期刊	ACTA PETROLOGICA SINICA
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257703
推荐引用方式 GB/T 7714	Li GuangWei,Fang AiMin,Wu FuYuan,et al. Studies on the U-Pb ages and Hf isotopes of zircons in the Aoyitake plagioclase granite, west Tarim.[J]. 中国科学院青藏高原研究所,2009,25(1).
APA	Li GuangWei,Fang AiMin,Wu FuYuan,Liu XiaoHan,Pan YuSheng,&Wang ShiGang.(2009).Studies on the U-Pb ages and Hf isotopes of zircons in the Aoyitake plagioclase granite, west Tarim..ACTA PETROLOGICA SINICA,25(1).
MLA	Li GuangWei,et al."Studies on the U-Pb ages and Hf isotopes of zircons in the Aoyitake plagioclase granite, west Tarim.".ACTA PETROLOGICA SINICA 25.1(2009).