摘要
通过磨西剪切带硅质白云岩和千糜岩岩石化学特征研究 ,论证了千糜岩是由硅质白云岩经剪切变形和变质作用而形成的。由磨西剪切带中千糜岩质量平衡分析表明 :以 Ti O2 守恒为限制条件 ,该剪切带损失了 6 2 %的体积 ;且同原岩 (硅质白云岩 )相比 ,千糜岩有 Si O2 损失 ;指出各种形态的石英脉是 Si O2
Our study of the petrochemical characteristics of siliceous dolomite and phyllonites in the Moxi shear zone demonstrates that phyllonite was formed by shear strain and metamorphism from silceous dolomitite. The results of mass balance analysis on the phyllonite from the Moxi shear zone are as follows: the Moxi shear zone lost 68% of volume as TiO 2 is assumed to be constant. The phyllonite has a loss of SiO 2 as compared with the protolith (siliceous dolomite). It is believed that quartz veins of various shapes were formed by migration and concentration.
出处
《成都理工学院学报》
CSCD
北大核心
2001年第1期45-47,共3页
Journal of Chengdu University of Technology
基金
原地质矿产部地质行业基金资助项目
