%0 Journal Article
%T The age of the Gaojiacun mafic-ultramafic intrusive complex in the Yanbian area, Sichuan Province: Geochro-nological constraints by U-Pb dating of single zircon grains and 40Ar/39Ar dating of hornblende<br>The age of the Gaojiacun mafic-ultramafic intrusive complex in the Yanbian area,Sichuan Province： Geochronological constraints by U-Pb dating of single zircon grains and ^40Ar／^39Ar dating of hornblende
%A Weiguang Zhu
%A Hailin Deng
%A Bingguang Liu
%A Chaoyang Li
%A Yu Qin
%A Yaonan Luo
%A Zhide Li
%A Daohui Pi
%A <br>
%J 科学通报(英文版)
%D 2004
%I 
%X The Gaojiacun mafic-ultramafic intrusive complex in the Yanbian area, Sichuan Province, is a stratiform intrusive body that has undergone intensive magmatic differentiation. This intrusive body involves two magmatic accumulating cycles. Systematic U-Pb dating of single zircon grains and40Ar/39Ar dating of hornblende were conducted, and the results showed that the age of hornblende gabbro, which was formed at the main phase of intrusion of the Gaojiacun intrusive complex, is 840–5 Ma, casting doubt on the concept of “Yanbian Ophiolite”. It is believed that the formation of the Gaojiacun intrusive complex seems to be related to a super-mantle plume underneath the super-continent Rodinia. The above research results are helpful for us to get a better understanding of the characteristics of Neoproterozoic tectonic evolution of the Yanbian area in Sichuan Province.
%K mafic-ultramafic intrusive complex
%K geochronology
%K Gao-Jiacun<br>角闪石
%K 高家村
%K 超镁铁质侵入复合物
%K 地质年代学
%K U-Pb定年
%K 单晶锆石
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=B4557067916C2535A04C62E6616CABCF&yid=D0E58B75BFD8E51C&vid=2A3781E88AB1776F&iid=F3090AE9B60B7ED1&sid=E6E6318AC4BCBFDB&eid=126825C4749D880D&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=9&reference_num=35