摘要
在稀溶液状态下的Ａｕ的吸附实验，较好地体现了地质热液过程中吸附作用在金矿成矿方面的重要性。黄铁矿与金的硫氢配合物的作用结果截然不同于黄铁矿与金的氯配合物的作用结果。黄铁矿对金的硫氢配合物的吸附是通过表面络合和静电吸附完成的，且不同类型黄铁矿有明显的吸附差异。矿物表面特性及非均匀催化可能在吸附过程中起了重要作用。金矿中常见的Ａｕ、Ａｓ和ｐ型黄铁矿三位一体的现象可能与Ａｓ对吸附作用的影响有较大关系。而金的氯配合物则极易被黄铁矿所还原。
The experimental study of adsorption of gold complexes by pyrite in dilute solutions shows the fundamental role of adsoaption in gold mineralization. The result of adsorption of gold hydrosulphido-complexes by pyrite is different from that of gold chloride complexes. These two kinds of complexes have different mechanism of adsorption. The former is associated with surface complex and electrosorption. There exists obvious discrepancy in adsorption density between different pyrites. The surface characteristics of minerals and heterogeneous catalysis may play an important role in adsorption. The coexistence of Au, As and p-type pyrite indicates the effect of As on adsorption. Gold chloride complexes are easily reduced by pyrite.
出处
《地球化学》
CAS
CSCD
北大核心
1996年第1期84-92,共9页
Geochimica
基金
国家自然科学基金
关键词
黄铁矿
吸附实验
成矿作用
金矿床
pyrite
gold-bearing solution
adsorption experiment
ore-forming process
