• 网站首页
  • 期刊介绍
    期刊简介
    编委会
  • 投稿指南
  • 过刊浏览
  • 在线订阅
  • 留言板
  • 联系我们
  • 网络预出版
  • English
引用本文:
【打印本页】   【下载PDF全文】   【查看/发表评论】  【下载PDF阅读器】  【关闭】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1368次   下载 1173次 本文二维码信息
码上扫一扫!
分享到: 微信 更多
字体:加大+|默认|缩小-
东昆仑都兰县可可沙地区加里东期石英闪长岩锆石LA-ICP-MS U-Pb年龄及其意义
张亚峰,裴先治,丁仨平,李瑞保,冯建赟,孙 雨,李佐臣,陈有炘
西部矿产资源与地质工程教育部重点实验室/长安大学地球科学与资源学院,陕西 西安 710054
摘要:
野外调研和室内综合分析表明,出露于东昆仑造山带东段都兰可可沙地区的加里东期石英闪长岩体包括4种岩石类型:①灰—深灰色中粒石英闪长岩;②灰色中粒片麻状石英闪长岩;③灰色中粗粒角闪石英闪长岩;④浅肉红色中细粒似斑状二长花岗岩。用LA-ICP-MS法进行了锆石U-Pb同位素年龄测定,样品11013的锆石206Pb/238U加权平均年龄为515.2Ma±4.4Ma(MSWD=2.5),限定该石英闪长岩体的形成时代为中寒武世,表明东昆仑造山带加里东早期存在一期岩浆活动事件。
关键词:  石英闪长岩  LA-ICP-MS锆石U-Pb同位素年龄  都兰可可沙地区  东昆仑造山带
DOI:
分类号:
基金项目:
LA-ICP-MS zircon U-Pb age of quartz diorite at the Kekesha area of Dulan County, eastern section of the East Kunlun orogenic belt, China and its significance
ZHANG Ya-feng, PEI Xian-zhi, DING Sa-ping, LI Rui-bao,FENG Jian-yun, SUN Yu, LI Zuo-chen, CHEN You-xin
Key Laboratory of Western China's Mineral Resources and Geological Engineering,Ministry of Education/ Faculty of Earth Science and Resources, chang'an University, Xi'an 710054, Shaanxi,China
Abstract:
After detailed field survey and indoor analysis, the quartz diorites exposed at the Kekesha area of Dulan, eastern section of the East Kunlun orogenic belt, include four types of rocks: (1)Gray-dark gray medium grained quartz diorite; (2) Gray medium grained gneissic quartz diorite; (3)Gray medium-coarse grained amphibole quartz diorite; (4)Light flesh-red medium-fine grained porphraceous adamellite. LA-ICP-MS method is used to determine the zircon U-Pb isotope age of the rock, which shows that the zircon 206Pb/238U weighted average age of the sample 11013 is 515.2±4.4Ma (MSWD=2.5) and defines the crystallization age of the rocks in Middle Cambrian period. It indicated that East Kunlun orogenic belt had experienced a magmatism event during the early Caledonian.
Key words:  
您是本站第  4180593  位访问者!
版权所有:地质通报
主办单位:    
地址:北京市西城区阜外大街45号中国地质调查局发展研究中心    邮政编码:100037
电话:010-58584206;010-58584208   电子邮箱:dzhtb@263.net
技术支持:北京勤云科技发展有限公司