%0 Journal Article
%T Hf isotope composition of zircons and implication for the petrogenesis of Yajiangqiao granite,Hunan Province,China<br>Hf isotope composition of zircons and implication for the petrogenesis of Yajiangqiao granite, Hunan Province, China
%A WANG Xiang
%A WLGriffin
%A WANG Zhicheng
%A ZHOU Xinmin
%A <br>WANGXiang
%A W.L.Griffin
%A WANGZhicheng
%A ZHOUXinmin
%J 科学通报(英文版)
%D 2003
%I 
%X In the peralumineous granite of Yajiangqiao zircon population can be divided into two groups (i.e. Zircon Ⅰ and Zircon Ⅱ), which were formed in magmatic chamber and in emplacement place, respectively. The Hf isotope compositions of two stages of zircon show that the host magma was essentially derived from crustal material by melting. However, some higher 176Hf/177Hf ratios indicate that the granitic zircons should contain fine crystal of zircon formed in mantle-derived magma. In fact, the backscattered electron imaging and the electron microprobe analysis reveal that there is another type of zircon included within Zircon Ⅰ, which is quite different from Zircon Ⅰ and Zircon Ⅱ in morphology and chemistry. They are considered to be the product of the mantle-derived magma intruded into the granitic magma chamber at the beginning of anatexis. Thus, it is suggested that the formation of Yajiangqiao granite is related to the underplating of mantle magma.
%K zircon
%K Hf isotope
%K peralumineous granite
%K underplating<br>Hf
%K 铪同位素
%K 锆石
%K 岩石成因学
%K 花岗岩
%K 底侵作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=CDAC6BE41600DC0EFDBA781C796E3A56&yid=D43C4A19B2EE3C0A&vid=B6DA1AC076E37400&iid=F3090AE9B60B7ED1&sid=342E193BAB6B28C5&eid=EAA944F99AA73B33&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=8&reference_num=12