摘要
湖南漠滨金矿床以发育大量的明金而著称。明金在早阶段矿化中主要以粒状包体金的形式赋存于脉石英中,在晚阶段矿化中则主要以细脉状分布于有关矿物的晶隙、裂隙中,或以树枝状覆于方铅矿等矿物的表面上。明金具丛聚及归并现象。明金形成机理是由以下几方面的因素共同作用造成的:1.矿石内硫化物含量偏低;2.成矿温度偏低;3.成矿期物化条件稳定,特别是成矿热液中Au、Ag的浓度变化不大;4.经受过长期的挤压剪切作用。
The visible gold in Mobin gold deposit mainly occurs in vein quartz formed in early mineralization stage and as fine vein in the crystal fissures and mineral fissures or in branched form on the surface of galenas and sphalerites generated in later stage. The visible gold possesses crowing and lumping features. The formation of visible gold is due to low content of sulfide, low mineralization temperature, stable physicochemical conditions (little variation of Au and Ag content in the metallo-genic thermal fluids) , and secular compressing and shearing.
出处
《地质科技情报》
CAS
CSCD
北大核心
1991年第4期59-62,共4页
Geological Science and Technology Information
