摘要
对主要载金矿物黄铁矿、方铅矿、闪锌矿和黄铜矿的成分进行了分析 ,查明了各矿物的化学组成及分布状态。矿石中微量元素特征表明 ,深部金银矿物的金成色明显增加 ,Au/Ag比值也随之相应升高 ,其变化与成矿温度成正比。金矿物中Fe的含量与金成色呈正相关。方铅矿中含Au和Ag时Pb反而略高 ,呈正相关。闪锌矿表现出贫锌的现象 ,含金银的闪锌矿中锌明显低 ,其铁的含量比不含金银的高 ,而其Cu也随深度增加而增加。黄铜矿中Zn随深度增加明显减少 ,而As和Au却升高 ,呈负相关。黄铁矿中的S和Fe比较稳定 ,含金矿物的黄铁矿中Fe/S比呈线性相关 ,金越高 ,Fe/S比值就越小 ,黄铁矿中金主要是显微金而非晶格金。
Based on analyzing of the chemical components of primary gold bearing minerals(pyrite, galenite, sphalerite and chalcopyrite) in the Jiaojia gold deposit, the distribution state of elements is discussed. Trace element characteristics of ores shows that:(1) the abundance of Au and Ag as well as Au/Ag ratios of gold and silver bearing increase with depth and ore formating temperature as well as the abundance of Fe;(2) abundance of gold and silver shows a positive relationship with that of Fe and Pb in galenite;(3)Zn is relatively poor in gold and silver bearing sphalerite and Cu increase with depth;(4)Zn decreases but Au and As in chalcopyrite increase with depth;(5) gold in pyrite exists as micromineral not within crystal lattice and its abundance decreases with increasing of the Fe/S ratio.
出处
《华南地质与矿产》
CAS
2002年第1期10-16,共7页
Geology and Mineral Resources of South China
基金
中科院知识创新工程项目KZCX1-0 7-0 2子课题"胶东 -鲁西主要金矿床的流体成矿作用"协作项目研究成果
