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中南大学学报(自然科学版)

Journal of Central South University

第22卷    第1期    总第77期    1991年2月

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文章编号:(1991)01-9-8
大王山动力变质带中蠕英石的特征和成因
朱余德; 何绍勋

(中南矿冶学院地质系)

摘 要: 文章根据大王山糜棱片麻岩中蠕英石的形态特征、分布规律、以及与岩石有限应变状态之间的几何关系等,说明蠕英石是在钾长石变形时形成且受到压应力方向的控制。文中对糜棱片麻岩中蠕英石的形成机理进行了探讨。

 

关键字: 蠕英石; 糜棱片麻岩; 变形作用; 动力变质作用; 大王山动力变质带

FEATURES AND GENESIS OF THE MYRMEKITE IN DAWANGSHAN DYNAMOMETAMORPHIC ZONE
Zhu Yude;He Shaoxun

Department of Geology

Abstract:Although there may be many different geneses for myrmekite, it has been demonstrated that the myrmekite in Dawangshan granitic mylonite-gneiss (DGMG) was formed during the deformation of K-feldspar and was controlled by the normal stress, on account of its shapes, distribution, and the geometric relationship between myrmekite development on K-feldspar augen and the finite strain state of the rock. The formation mechanism of the myrmekite in DGMG has been discussed and it has been suggested that the myrmekite was formed as a product of the reaction of aqueous Na+ and Ca2+ on Kfeldspar in an amphibolite facies.

 

Key words: myrmekite; mylonite-gneiss; dynamometamorphism; deformation; Dawangshan dynamometamorphic zone

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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