论文部分内容阅读
本文根据表生矿物的共生组合和它们的产状特征,探讨了长江中下游地区铜矿床、铅锌矿床与黄铁矿矿床氧化带发育过程的几个主要阶段。作者认为在含多量二硫化物的矿床中,虽然是在湿温多雨的条件下,氧化作用过程中硫酸盐阶段仍然很重要,尤其对铜矿床来说,它促使铜大量向下迁移,在物化—地质条件合适时形成次生硫化铜的富集。硫酸盐阶段作用强度大,但时间短促,硫酸盐随生随灭。由于硫酸盐阶段有可能超越碳酸盐阶段直接进入氧化物—氢氧化物阶段,铜的碳酸盐很少发育。重要的是氧化物—氢氧化物阶段,其后的硅酸盐阶段与络盐阶段极为次要。 在二硫化物数量少的铅锌矿床中,氧化作用过程中重要的是碳酸盐阶段与硅酸盐阶段。
Based on the symbiotic assemblages of epigenetic minerals and their characteristics of occurrence, the paper discusses several major stages of the development of the oxidation zone of copper deposits, lead-zinc deposits and pyrite deposits in the middle and lower reaches of the Yangtze River. The authors believe that the sulphate phase is still important during the oxidation process, even in wet and warm rainy days, in deposits containing a large amount of disulfide, which, in particular for the copper deposit, led to a substantial downward shift of copper in the Materialization - Enrichment of secondary copper sulfide forms when geological conditions are appropriate. Sulfate stage of the intensity of action, but time is short, with the sudden disappearance of sulfate. Because of the potential for the sulphate phase to go beyond the carbonate phase directly into the oxide-hydroxide phase, copper carbonate seldom develops. Importantly, the oxide-hydroxide phase, followed by the silicate phase and the salt phase, is of secondary importance. In lead-zinc deposits with a small number of disulfides, what is important in the oxidation process is the carbonate and silicate phases.