摘要
根据红土的定义和贵州两类红土型金矿的物质组成,讨论了风化原岩(矿)的特征,计算了矿石的分子比:SiO2/(AlO3+Fe2O3),并讨论了红土形成的地球化学过程。指出除成矿作用过程中矿物组成基本不变的石英而外,由于黄铁矿矿物氧化对氧化铁(Fe2O3)的重要贡献,其他矿物最终形成高铁铝氧化物、较低SiO2含量的符合红土硅/铝(铁)氧化物分子比的红土。认为将贵州西南部晴隆老万场、盘县砂锅厂等金矿称之为红土型并无不妥,基本符合红土定义。
According to the definition of lateritic ,the author studied the components of the two types of lateritic gold and the features of weathered protolith of lateritic gold, calculated the molecular ratio of ore (SiO 2 / (Al 2O 3+Fe 2O 3)), and reconstructed the geochemical process during formation of laterite, and point out that except that the quartz is preserved almost without change, great contribution of pyrite to the formation of Fe 2O 3 and the other minerals are transformed into laterite which contains hi_Fe_Al oxides and low_SiO 2 and coincides with typical laterite' Si / Al (Fe) molecular ratio. Based on the above, the author considers that it is reasonable to name those gold deposits in southwestern Guizhou lateritic gold deposits, such as Laowanchang of Qinglong county and Shaguochang of Panxian Country.
出处
《贵州地质》
1999年第2期91-96,共6页
Guizhou Geology
基金
贵州省"九五"重点科技攻关项目!阶段性成果
