宁夏金场子金矿床氧化带中微细金球特征

The Features of Microgranular Gold Grains in the Oxidation Zone of the Jinchangzi Au-deposit, Ningxia

金场子金矿床氧化带中的微细金球,形态为圆球状、椭球状、水滴状、钟乳状等。球粒均由多晶体组成,且成色极高。微细金球颗粒内化学成分分布较均匀。微细金球可能是在表生条件下由胶体作用形成的。

The microgranular gold grains in the oxidation zone of the Jinchangzi gold deposit are occurred in different shapes (spheric, ellipsoidal, water drop, stalactitic, etc.). Each gold grain is composed of many crystals (multi-crystal form) and has a higher purity. The distribution of chemical compositions is uni- form within each gold grain. These microgranular gold grains were formed by colloidization under a su- pergenous condition.