论文部分内容阅读
在对元谋县猛林沟、牟定县戍街两地红土化剖面的地质特征、次生矿物变化、主要元素及金含量变化进行研究的基础上．探讨了金在红土化剖面上的分布形式和红土化过程中全的活化、迁移及沉淀等的机理。笔者认为，区内保存完整的红土化剖面上存在金的双峰式富集，其中产于铁质硬壳层附近的上部金富集带是由于铁质胶体吸附的结果，而腐泥岩层附近的下部金富集带是由Eh变小、pH变大引起的；氧化还原作用是金活化、迁移、沉淀富集最重要的控制机制。
Based on the study on the geological characteristics, the secondary mineral changes, the main elements and the gold content of the laterites in the Menglin ditch of Moumou County and Shuke Street in Mouding County, The distribution mechanism of gold on the laterite section and the mechanism of activation, migration and precipitation in the later stage of the latter are discussed. The author believes that there is a bimodal enrichment of gold on the preserved lateritic section in the area, in which the upper gold-enrichment zone produced near the hard iron crust is the result of iron colloid adsorption, The lower gold enrichment zone is caused by the decrease of Eh and the increase of pH. Redox is the most important control mechanism of gold activation, migration and sedimentation enrichment.