辽宁凌源柏杖子金矿区花岗岩SHRIMP锆石U-Pb年龄  

SHRIMP Zircon UPb Age of the Granite at Baizhangzi Gold Field in Lingyuan, Liaoning Province

作　　者：罗镇宽[1] 李俊建[2] 关康[1] 裘有守[1] Y.M.Qiu N.J.McNaughton D.I.Groves 

机构地区：[1]天津地质研究院 [2]天津地质矿产研究所,天津300170 [3]Centre for Strategic Mineral Deposits,Department of Geology amd Geophysics ,the University of Western Australia

出　　处：《地质调查与研究》2004年第2期82-85,128,共5页Geological Survey and Research

基　　金：中国和澳大利亚经济技术合作研究基金项目

摘　　要：采用SHRIMP测年方法测得柏杖子金矿区含矿花岗岩的锆石U-Pb年龄为(222±3)Ma,与区内都山花岗岩基和三家子金矿区花岗斑岩的年龄一致,属中生代印支期后碰撞花岗岩。该年龄限定了金矿化年龄的下限,即金矿化不可能早于印支期,但并不能确定金矿化的精确年龄。根据金矿脉与后期岩脉伴生的特征,矿化可能发生在中生代燕山期。The zircons of ore-bearing granite at Baizhangzi gold field in Lingyuan, Liaoning Province yield a SHRIMP U-Pb age of (222± 3)Ma, the same with the ages of Dushan granic batholith in the same region and the granite-porphyry in Sanjia gold field.It is suggested that the granites belong to post-collision granites of Indo-Chinese epoch. This age may be the lower limit of the gold ore formation, which means the mineralization time is not earlier than Indo-chinese epoch. According to the associated features of the gold veins and late-aged dikes, the mineralization probably took place during the Yanshan epoch in Mesozoic era.

关 键 词：柏杖子金矿 花岗岩 SHRIMP年龄 辽宁凌源 

分 类 号：P597[天文地球—地球化学] .1[天文地球—地质学]