%0 Journal Article
%T A combined study of SHRIMP U-Pb dating, trace element and mineral inclusions on high-pressure metamorphic overgrowth zircon in eclogite from Qinglongshan in the Sulu terrane
%A Qiuli Li
%A Shuguang Li
%A Zhenhui Hou
%A Ji&#
%A an Hong
%A Wei Yang
%A <br>LI Qiuli
%A LI Shuguang
%A HOU Zhenhui
%A HONG Ji''''an & YANG Wei School of Earth and Space Sciences
%A University of Science and Technology of China
%A Hefei
%A China
%A Institute of Geology and Geophysics
%A Chinese Academy of Sciences
%A Beijing
%A China
%J 科学通报(英文版)
%D 2005
%I 
%X Methods recently advanced for discrimination on the genesis of metamorphic zircon, such as analysis of mineral inclusions and trace elements, provide us powerful means to distinguish zircon overgrowth during high-pressure metamorphism. Zircons in ultrahigh-pressure eclogite from Qinglongshan in the Sulu terrane were studied by the SHRIMP U-Pb method in combining with trace element and mineral inclusion analyses. No inherited core was identified in the analyzed zircons by means of cathodoluminescence images. The occurrence of high-pressure metamorphic mineral inclusions in zircon, such as garnet, omphacite, rutile, and the flat HREE pattern in zircon indicate that the zircon formed at high-pressure metamorphic conditions. Therefore, a weighted average U-Pb age of 227.4 ± 3.5 Ma obtained from such a kind of zircon is interpreted to represent the timing of peak metamorphism for the Qinglongshan eclogite.
%K SHRIMP dating
%K trace element
%K mineral inclusions
%K peak metamorphic time<br>年龄测定方法
%K 微量元素
%K 矿石
%K 压力
%K 变质结构
%K 锆石
%K 榴辉岩
%K 岩层
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=84970691F7BB6E8488115CF0AD8E4F55&yid=2DD7160C83D0ACED&vid=771152D1ADC1C0EB&iid=94C357A881DFC066&sid=3389C664025A98F9&eid=BC88D6B0750E09D1&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=3&reference_num=50