%0 Journal Article
%T SHRIMP U-Pb zircon ages of tuff in Baogutu Formation and their geological significances<br>新疆西准噶尔包古图组凝灰岩锆石SHRIMP年龄及其地质意义
%A AN Fang
%A ZHU YongFeng
%A <br>安芳
%A 朱永峰
%J 岩石学报
%D 2009
%I 
%X Lower Carboniferous volcanic-sedimentary rocks including Tailegula, Baogutu and Xibeikulasi formations are widely distributed in western Junggar. The ages of the three formations were defined by fossils before. Three altered tuff samples are dated to be 328.4Ma (MSWD=0.72), 342.6Ma (MSWD=0.76) and 336.5Ma (MSWD=1.6) by zircon SHRIMP, respectively, which helps constraining the age of the Baogutu Formation. A combination of the zircon SHRIMP ages and the distribution relationship between the three formations suggest that the Tailegula Formation is the youngest, and the Xibeikulasi Formation is the oldest in the Lower Carboniferous.
%K Tuff
%K Zircon SHRIMP
%K Baogutu Formation
%K Western Junggar
%K Xinjiang<br>凝灰岩
%K 锆石SHRIMP
%K 包古图组
%K 西准噶尔
%K 新疆
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=43CF5752A9D42764EDC67C93A155C3CA&yid=DE12191FBD62783C&vid=C5154311167311FE&iid=B31275AF3241DB2D&sid=A67C4D140E145357&eid=B93F010195432A97&journal_id=1000-0569&journal_name=岩石学报&referenced_num=9&reference_num=48