大坪金矿石英标型特征及其找矿意义  

THE TYPOMORPHIC CHARACTERISTICS OF QUARTZ IN DAPING GOLD DEPOSIT AND THEIR ORE-PROSPECTING SIGNIFICANCE

作　　者：周跃飞[1] 刘星[1] 亓春英[1] 

机构地区：[1]昆明理工大学国土资源工程学院地球科学系,云南昆明650093

出　　处：《云南地质》2003年第3期288-294,共7页Yunnan Geology

基　　金：云南省自然科学基金项目 (97D0 32M)资助

摘　　要：元阳大坪金矿属含金石英脉型。石英的形态、微形貌、结构、化学成分及各种物性中赋有大量金矿化成因信息。对石英进行产状、化学成分、晶胞参数、红外光谱和包裹体的研究结果表明 :成矿作用的五个阶段中 ,矿化强烈的Ⅲ、Ⅳ阶段石英的特征与其它阶段相比有明显区别 :主成分中SiO2 含量相对较低 ,杂质成分较高 ,包裹体数量多 ,晶胞参数较大。这些特征对寻找有价值的矿体极具指示作用。The Daping Au deposit is mainly of quartz vein type. There are a lot of Au metallgenesis information in the form, micromorphologic, structure, chemical composition and various physical characteristics of quartz. According to the study on the occurrence, chemical composition, unit cell parameter, infrared spectrum and inclusions of quartz, the result shows that the quartzs characteristics of step Ⅲ and Ⅳ with intensive metallogenesis are very different from those of others in 5 metallogenetic steps. The SiO 2 content is lower; the impurities are higher, with plenty of inclusions and larger unit cell parameter. These characteristics are good indications in the ore-prospecting.

关 键 词：大坪金矿 石英标型特征 找矿意义 云南 元阳县 形态 微形貌 结构 化学成分 矿化 

分 类 号：P618.51[天文地球—矿床学] P578.494[天文地球—地质学]