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团结沟斑岩金矿床的地质特征,已有文章论述,本文仅就该区自然金成因矿物学的研究成果介绍如下。一、自然金的矿物标型根据自然金的颗粒大小及在矿物中的赋存状态,将该区自然金大致分为三类。第一类金为矿石及脉石矿物中的次显微金,据透射电镜研究,次显微金一般是0.2—0.05微米,呈圆球状、链状赋存在硫化矿物之中,其分布方式与寄主矿物的结晶形态有很大关系,在结核状或同心圆状的白铁矿之中,次显微金沿其边缘呈同心环状分布,少部分在晶体间隙内。部分次显微金呈立方体{100}及八面体{111}的聚形晶产出。
The geological characteristics of the Tuanjiegou porphyry gold deposit have been discussed in the article. The results of the research on the natural gold mineralogy in this area are presented below. First, the natural gold mineral type According to the size of natural gold particles and the presence of minerals in the area of natural gold can be roughly divided into three categories. The first type of gold ore and gangue mineral sub-micro-gold, according to transmission electron microscopy, sub-micro-gold is generally 0.2-0.05 microns, was spherical, chain-like presence of sulfide minerals, and its distribution and Host mineral crystal morphology has a great relationship, in the nodular or concentric white iron ore, submicron gold along its edge was concentric annular distribution, a small part of the crystal gap. Some sub-micro-gold was cubic polyhedral {100} and octahedral {111} polycrystalline output.