贵州坑头金矿显微构造特征及其成因浅析

坑头金矿属于典型的含金石英脉型,其成因及矿体产出严格受构造控制。从显微乃至超微的尺度介绍了矿区岩矿中出现较多的显微构造现象,并结合区域构造背景分析它们的成因及指示意义。研究发现坑头金矿岩矿中显微破裂、粒间滑移、晶质塑性变形、扩散物质迁移现象、微型褶皱与断层等显微构造现象均有发育。综合分析表明该矿床石英脉的形成分为多个期次,并经历了以脆—韧性变形为主的复杂构造运动。

Analysis on the Micro-structural Features and Causes of Kengtou Gold Deposit in Guizhou Province

Kengtou Gold Deposit is a typical Quartz vein-type Gold Deposit,its causes and ore body distribution are strictly controlled by the structure.This paper describes the main microstructure phenomena appear in rock ores in Kengtou Gold Deposit based on microscopic and even superfine scale,and connecting with the regional tectonic background,analyzes their causes and indicates significance.The study found that the micro-cracking,sliding between particles,crystal plastic deformation,proliferation and migration phenomenon,micro-folds and faults have developed in rock ores in Kengtou Gold Deposit.And comprehensive analysis shows that the formation of Quartz veins of the deposit period is divided into several segments,and has experienced a complex tectonic movement based on brittle-ductile deformation.