摘要
那郎金矿床大地构造位置处于扬子准地台与华南褶皱系右江褶皱带接触部位,靠右江褶皱带一侧,属卡林型金矿床,以氧化矿为主。其容矿岩石主要为砂质粘土岩、泥灰岩等不纯碳酸盐岩,褐铁矿化、硅化、高岭土化等与金关系最为密切;矿体受地层、构造及蚀变三重控制。成矿期后容矿原岩经氧化,致使赋存在载金矿物中的包裹金游离出来,成为氧化矿中的游离金。
Nalang gold deposit is located at the contact part of Yangtze para-platform and Youjiang fold belt of South China fold system and is on the side of Youjiang fold belt. The deposit is a Carlin type gold deposit and within it oxidized ores are predominated. The ore-bearing rocks are mainly impure carbonate rocks like are- naceous claystone and marlite. The gold has the closest relationship with ferritization, silicification, and ka- olinization. The orebodies are controlled simultaneously by the formation, the structure and the alteration. The postmineral host rocks liberate the inclusion gold occurred originally in the gold-bearing minerals through oxidization, and the inclusion gold becomes the free gold in oxidized ores.
出处
《矿产与地质》
2015年第4期514-518,共5页
Mineral Resources and Geology
关键词
卡林型金矿
氧化矿
矿床地质特征
富矿机理
Carlin type gold deposit, oxidized ore, deposit geological characteristic, metallogenic mechanism
