硫同位素在示踪金属矿床成矿物质来源中的应用

摘要

To determine the source of ore-forming materials in metal deposits, we can better explore the genesis of metal deposits, summarize metallogenetic regularitiy, and serve for geological prospecting.At present, in the study of ore-forming material sources, Sulfur isotope tracing is one of the methods used to indirectly measure and infer the approximate source of minerals.The application of sulfur isotope can effectively trace the source of ore-forming materials in metal deposits, ore-forming fluid migration and metallogenetic mechanisms, and genesis of deposits.However, when sulfur isotopes are used to trace the source of ore-forming materials in metal deposits, the geological characteristics,physical and chemical conditions for the evolution of ore-forming fluids,and mineral assemblages of different metal deposits will have an impact on the determination of sulfur sources.Therefore, it is necessary not only to select the appropriate method to successfully obtain the δ34SΣS data of the ore-forming fluid, but also to analyze the geological characteristics of the metal deposit specifically, and combine the multi-trace method to make the tracer result more accurately close to the geological facts. The source of the ore-forming material in the metal deposit is better determined.The method of using sulfur isotope to trace the ore-forming materials of metal deposits and the problems that should be paid attention to are summarized in combination with the examples of deposits.%提 要 确定金属矿床成矿物质的来源才能更好的探讨金属矿床的矿床成因、总结其成矿规律、为地质找矿服务.目前在成矿物质来源研究中常需要依据其他科学方法来间接测定和推断矿质的大致来源,硫同位素示踪研究就是其方法之一.应用硫同位素可以有效示踪金属矿床中成矿物质的来源、成矿流体搬运及成矿机制、矿床成因等.但硫同位素在示踪金属矿床中成矿物质来源时,因不同金属矿床的地质特征、成矿流体演化的物理化学条件以及矿物组合规律差异都会对判断硫源有影响,因此不但要选择合适方法成功获取成矿流体的δ34S∑S数据,还需具体的分析金属矿床的地质特征,采用多元的示踪方法相结合,让示踪结果更准确地接近地质事实,这样才能更好的确定金属矿床中成矿物质的来源.