含金石英脉中黄铁矿固态分解的组构特征  

THE FABRIC CHARACTERISTICS OF SOLID STATE DECOMPOSITION OF THE PYRITE IN THE LODE-GOLD DEPOSITS

作　　者：于风池[1] 马国良[1] 丰成友 

机构地区：[1]西安工程学院资源与材料工程系

出　　处：《西安地质学院学报》1997年第3期14-18,共5页

摘　　要：胶东新城及陕西小秦岭地区含金石英脉中，微晶磁黄铁矿交代置换黄铁矿并发育了一种特征的蠕虫状显微多孔构造，前人文献中尚未见报道。基于矿相学和矿物学研究，我们认为微晶磁黄铁矿及其特征的组构是黄铁矿固态等化学分解的产物，其显微多孔构造与体积收缩和硫的逸失有关。The micritic pyrrhotites,which occur in the gold-quartz vein mineralization at Xincheng(Shandong Province)and Xiaoqinling (Shaanxi Province),were formed through the replacement of pyrites.Theyare characterized by the vermicular microscopic porous structure.And this kind of structure has not been reported in these areas before.Based on the studies of mineragraphy and mineralogy,we concluded that the micritic pyrrhotites in the lode-gold deposits are product of the solid-state isochemical decomposition of thepyrites,and that the microscopic porous structure has a lot to do with the contraction of volume and the escape of sulfur.

关 键 词：石英脉 含金 黄铁矿 固态分解 组构特征 

分 类 号：P578.494[天文地球—矿物学] P578.292[天文地球—地质学]