西藏南部若干变质橄榄岩体橄榄石的组构特征
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金,地矿部“七五”重点攻关课题研究论文


Fabric Characteristics of Olivine in Some Metaperidotite Massifs in Southern Tibet
Author:
Affiliation:

Fund Project:

  • 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:

    藏南变质橄榄岩的橄榄石组构可划分为三个主要类型:[100]、[010]和[001]组构。橄榄石[100]组构反映洋壳下部—上地幔上部的高温粘性流变和高温塑性流变,橄榄石[010]和[001]组构基本上是构造侵位阶段陆壳中低温塑性流变结果。变质橄榄岩中橄榄石组构转化具有明显的规律性,在岩体变形过程中,总的显示由高温的[100]组构逐渐转化为低温的[001]、[010]组构。高温塑性流变组构影响和制约低温塑性流变组构的发育,叠加变形有利于橄榄石[100]极密的加强和[100]组构向[010]、[001]组构的转化。

    Abstract:

    Metaperidotite occurring at the bottom of the Yaluzanbujiang ophiolite suite has extensively experienced strong deformation. According to main characteristics of plastic deformation in the studied massifs and X-ray fabric analysis, the fabrics of olivine can be classified into three main types: [100], [010] and [001], which all assume the maximum pattern and are respectively parallel to lineation, The development of fabrics closely related to deformation conditions (such as flow stress, temperature and strain rate), deformation mechanism and deformation evolution results from dislocation movement.The fabric transformation of olivine in metaperidotite shows obvious regularity. In general, there is a progressive transition from high temperature [100] fabric to low temperature [010] and [001] fabrics in the process of deformation. The high temperature plastic flow fabrics affect and restrict the development of low temperature ones, and the overprinted deformation is favorable for the formation of [100] preferred orientation and the transformation from [100] fabric to [001] and [010] fabrics.

    参考文献
    相似文献
    引证文献
引用本文

崔军文, 1988. 西藏南部若干变质橄榄岩体橄榄石的组构特征[J]. 岩石矿物学杂志, 7(3):228~236.
Cui Junwen, 1988. Fabric Characteristics of Olivine in Some Metaperidotite Massifs in Southern Tibet[J]. Acta Petrologica et Mineralogica, 7(3): 228~236.

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:
文章二维码