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浸染型金矿床近年来引起人们的普遍重视。该类矿床按照赋存围岩不同可以分为两大类:即产于沉积岩中的浸染型金矿,以美国内华达州的Carlin、Cortez,Enfeild Bell为代表,成矿与封闭在不透水层之下的地下水环流作用有关。第二类是产于火山岩中的浸染型金矿,该类矿化和低温浅成金银矿间有成因联系,成矿与古热泉作用有关,以内华达州的Borealis矿床为代表,向下可以过渡为脉型金银矿化或贱金属矿化。本文在典型矿床研究基础上,提出了两种可能矿床成因模型,广泛对比了两类矿化的成矿特征,为建立产状模型打下了基础。本文是笔者根据1986年美国地质调查所出版的约30万字的论文集有关章节综合编写的。
In recent years, disseminated gold deposits have attracted widespread attention. According to different host rocks, this type of deposit can be divided into two categories: disseminated gold deposits in sedimentary rocks, represented by Carlin, Cortez and Enfeild Bell in Nevada, USA, and mineralized and enclosed in the impermeable layer Groundwater circulation under the role of. The second type is the disseminated gold mine produced in the volcanic rocks. The mineralization is related to the genesis of pale-to-low-temperature gold and silver deposits. The mineralization is related to the effect of paleothermic springs. As represented by the Borealis deposit in Nevada, Can transition to pulse-type gold and silver mineralization or base metal mineralization. Based on the study of typical deposits, this paper proposed two possible genesis models of mineral deposits, extensively compared the mineralization characteristics of two types of mineralization, and laid the foundation for the establishment of the yield model. This article is compiled by the author based on the chapter of the 300,000-word essay published by the 1986 U.S. Geological Survey.