地学前缘 ›› 2011, Vol. 18 ›› Issue (2): 55-62.

• 论文 • 上一篇    下一篇

内蒙古大青山高级变质岩中熔体线理特征

刘正宏，李世超，徐仲元，董晓杰，王兴安   

  1. 1. 吉林大学 地球科学学院， 吉林 长春 130061
    2. 中国地质科学院 地质研究所， 北京 100037
  • 收稿日期:2010-10-11 修回日期:2011-02-16 出版日期:2011-03-15 发布日期:2011-04-15
  • 作者简介:刘正宏(1960—)，男，博士，教授，从事构造地质研究。E-mail：zhliu@jlu.edu.cn
  • 基金资助:

    国家自然科学基金项目（40972135，90814006)

Characteristics of melt lineation of highgrade metamorphic rocks at Daqingshan region of Inner Mongolia.

Liu Zhenghong，Li Shichao，Xu Zhongyuan，Dong Xiaojie，Wang Xingan   

  1. 1. School of Earth Sciences， Jilin University， Changchun 130061， China
    2. Institute of Geology， Chinese Academy of Geological Sciences， Beijing 100037， China
  • Received:2010-10-11 Revised:2011-02-16 Online:2011-03-15 Published:2011-04-15

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摘要：

熔体线理由浅色部分熔融物质形成长的集合体或杆状体沿着应变椭球体X轴方向定向排列构成，是高级变质岩特有的一种线状构造。熔体线理发育在深部构造层次韧性变形带中，与矿物拉伸线理一样具有运动方向指向意义。熔体线理形成于伸展构造环境中，是变形作用、变质作用和部分熔融作用共同作用的结果。伸展构造变形导致岩石部分熔融，是熔体线理形成的主要机制。其内保留大量深部地壳岩石流变信息，对探讨地壳深部岩石流变机制和早期地壳形成演化具有重要科学意义。

关键词: 大青山, 高级变质岩, 熔体线理, 部分熔融

Abstract:

Melt lineation is a special linear structural element of highgrade metamorphic rocks, which is composed of long lens or rodlike aggregates of melted leucoveins distributed along Xaxis direction of strain ellipsoid. Melt lineation developed in ductile deformation zones of deep structural levels of crust and may indicate the moving direction as the mineral stretching lineation does. Melt lineation is controlled by deformation, metamorphism and partial melting in an extensional tectonic environment. The main mechanism of melt lineation is extensional deformation which led to partial melting of highgrade metamorphic rock. Melt lineation keeps a lot of rock rheological information of deep crust, which is of great scientific significance for probing into rock rheological mechanism of deep crust and the formation and evolution of early crust.

Key words: Daqingshan, highgrade metamorphic rock, melt lineation；partial melting

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