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以云南老王寨金矿区煌斑岩为初始物 ,利用DS 2 9A型 36 0 0t超高压装置在 1 .5和3.0GPa条件进行了煌斑岩 +金体系的熔融实验 .实验结果表明 ,均匀分布于煌斑岩中的金粉(小于 40 0目 )聚集成金球沉积于实验产物的底部 ,煌斑岩熔体 (玻璃 )中金含量甚微 ,煌斑岩中存在硫有利于金聚集成球而沉积 .据此认为煌斑岩岩浆携金能力较差 ,在金矿化过程中提供大量金源的可能性较小 .
Taking the lamprophyre of Laowangzhai gold deposit in Yunnan Province as the starting material, the melting experiment of lamprophyre + gold system was carried out at the conditions of 1.5 and 3.0 GPa using the DS 2 9A 36 0 0t UHP unit. The experimental results show that, Gold powder (less than 40 mesh) uniformly distributed in the lamprophyre aggregates into gold balls deposited at the bottom of the experimental product. The gold content of the lamprophyre melt (glass) is negligible and the presence of sulfur in the lamprophyres favors the gold accumulation Therefore, it is considered that the lamprophyre magma is less capable of carrying gold and is less likely to provide a large amount of gold source during gold mineralization.