PROGRESS OF RESEARCH ON GOLD “SOURCE BED/ROCK”
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摘要: 国内外对金矿"矿源层(岩)"的研究经历了推断假说阶段、地球化学判别阶段和金的赋存状态(可释放性)研究阶段.最新研究表明,地层/岩石中的金可以分为两个部分,一部分金赋存在硅酸盐或氧化物相晶格中,这部分金在成矿过程中很难被释放出来,故对成矿无贡献或贡献不大;而另一部分则主要赋存于硫化物矿物、造岩矿物颗粒之间及有机质或碳酸岩颗粒中,在后期成矿作用过程中,易于被释放出来,随着成矿介质(流体等)迁移,在有利成矿部位富集成矿.随着研究日渐深入,矿源层理论将与自然界的地质事实越来越接近.Abstract: The research on the "source bed/rock" for gold deposits has experienced three periods, that is, the period of hypothesis and inference, the period of geochemical distinction and the period of study on the occurrence (or releasability) of gold.The newest result shows that the gold in strata or rocks is in two parts.One of them occurs inside the lattice of silicate or oxide facies, which is difficult to be released in gold mineralization, with less contribution to metallogenesis.The other occurs mainly between the grains of sulfides or rock-forming minerals and within organic or carbonate grains, which is easy to be released, transferred by ore-forming fluids, and enriched in favorable position for depositing in the later stage of mineralization.
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Key words:
- gold /
- source bed /
- deposit /
- metallogeny /
- geochemistry
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