四川石棉田湾含矿石英脉成因探讨  

ON THE ORIGIN OF ORE-BEARING QUARTZ VEINS IN THE TIANWAN AREA, SHIMIAN, SICHUAN

作　　者：吴香尧[1] 骆耀南[2] 

机构地区：[1]成都理工学院地质学系,成都610059 [2]四川省地质勘查局

出　　处：《成都理工学院学报》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

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 O2Our 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.

关 键 词：硅质白云岩 剪切变形 石英脉 成因 千糜岩 变质作用 岩化过程 体积亏损 

分 类 号：P588.33[天文地球—岩石学]