雪峰隆起北部加里东事件的KAr年代学研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

本文为中国石油化工股份有限公司重大科技项目“中国南方(中上扬子)大陆构造与海相油气前景研究”的成果。


Author:
Affiliation:

Fund Project:

单位:
  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    详细的野外构造变形分析表明雪峰隆起经历了加里东期、印支期、晚侏罗世末—早白垩世初和早白垩世末—晚白垩世初共4次变形事件,后3期褶皱变形的方位可能分别为北西西、北东—北北东和近南北向,而加里东期褶皱方位因受后期叠加改造影响而无法准确识别。雪峰隆起北部板溪群板岩伊利石X射线衍射分析显示其经历了低绿片岩相区域变质作用。板溪群板岩伊利石KAr年代学研究表明雪峰隆起经历了加里东期构造热事件,该事件发生的时间大致略早于419 Ma(晚志留世初)。所获得的419~389Ma(晚志留世—中泥盆世)的冷却年龄,指示了雪峰隆起发生过加里东期隆升。华南加里东变形事件直接影响到雪峰隆起本身,向西的波及界线可能为该隆起西界上的张家界—花垣—凯里断裂带。

    Abstract:

    Detailed structural deformation analysis indicate that the Xuefeng Uplift underwent four phases tectono—thermal events, Caledonian, Indosinian, the end of Late Jurassic to the earliest of Early Cretaceous and the end of Early Cretaceous to the earliest of Late Cretaceous, the orientations of the late three phases folds are NWW, NE—NNE and nearly NS, the orientation of Caledonian deformation can not be identified accurately due to the influence of the late deformation overprinting. XRD analysis of the Banxi Group slate in the northern Xuefeng Uplift suggest a lower greenschist facies metamorphism. Caledonian tectono—thermal event indeed taken place in the uplift showed by the KAr geochronology of slate illite of the Banxi Group and it happened as earlier as 419Ma, ( the earliest of Late Silurian ). The cooling ages of 419~389Ma (Late Silurian to Middle Devonian) demonstrate the Caledonian unroofing and the uplifting time of the uplift. Caledonian deformation event of the South China influenced directly the Xuefeng Uplift itself, and the western boundary of the influence possibly to the Zhangjiajie—Huayuan—Kaili fault zone approximately.

    参考文献
    相似文献
    引证文献
引用本文

胡召齐,朱光,张必龙,张力.2010.雪峰隆起北部加里东事件的KAr年代学研究[J].地质论评,56(4):490-500,[DOI].
.2010.[J]. Geological Review,56(4):490-500.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期:
  • 出版日期: