论文部分内容阅读
田湾成矿带的 1 9个自然金样品的电子探针测试表明 ,该成矿带自然金的成色平均大于 90 0‰ ,成色很高 ;自然金中的杂质元素以Ag、Fe、Cu、Bi为主 ,这与该成矿带金主要赋存于黝铜矿、黄铁矿有关。该区金成色高的原因可能与成矿流体的沸腾不混溶作用造成的突然降温降压从而导致金银的分离有关 ;黝铜矿形成过程对银的消耗造成金银的分离也是该区金成色高的原因之一。另外 ,该区Au (Au +Ag)与Na+ (Na++K+)及CO2 CH4的关系表明 ,Na+ (Na++K+)和CO2 CH4的变化对Au (Au +Ag)的影响较大。
Electron probe tests of 19 natural gold samples in the Tianwan metallogenic belt show that the average quality of the natural gold in the metallogenic belt is greater than 90 0 ‰ and the color is very high. The impurity elements in natural gold are Ag, Fe, Cu, Bi is dominant, which is related to the fact that the gold in the metallogenic belt mainly exists in tetrahedrite and pyrite. The reason for the high gold formation in this area may be related to the sudden cooling and depressurization caused by the immiscibility of the ore-forming fluid, which leads to the separation of gold and silver. The separation of gold and silver due to the consumption of silver during the formation of tetrahedrite is also the gold High color one of the reasons. In addition, the relationship between Au (Au + Ag) and Na + (Na ++ K +) and CO2 CH4 shows that the changes of Na + (Na ++ K +) and CO2 CH4 have a great effect on Au (Au + Ag)