【摘要】 流体是不是呈酸性,不是简单地由其pH值是否小于7确定,而应该根据其pH值是否大于一定温度下纯水的pH值确定。以会泽铅锌矿床为例,根据不同成矿阶段矿物相之间的平衡条件,讨论了成矿流体pH值随温度变化的情况。结果表明,会泽铅锌矿床成矿时流体呈中性—弱碱性,金属矿物(包括金属硫化物)是从中性—弱碱性溶液(而不是酸性溶液)中析出,这与前人的观点有着很大的不同。更多还原

【Abstract】 Whether the fluid is acidic does not depend on whether its pH value is higher than 7,but depends on whether its pH value is higher than the pure water’s pH value at its temperature.This paper studied the variation of pH value of ore-forming fluid with temperatures under the condition of equilibrium among minerals crystallized at different ore-forming stages in the Huize lead-zinc ore deposit. It is shown that the metallic minerals including metallic sulfides were precipitated from neutral to slightly alkalic solutions rather than from acidic solution.This conclusion differs from that of Zhou Chaoxian(1997) and Zhu Laimin et al.(1995).更多还原