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本文主要介绍了几种典型金矿床的流体包裹体及同位素研究资料,以及在此基础上得出的关于矿化流体的特征及矿床成因模式。大多数原生金矿床,不论其成因如何,它们的均一温度都在100℃~400℃范围内,流体成分以贫NaCl而含有CO_2为特征,特别是与变质热液有成因联系的金矿床,流体富含CO_2更为普遍。一般情况下,与矿化有关的热水溶液盐度小于10wt%。浅成热液金矿床,成矿流体来源复杂,可以来自岩浆热液,也可来自大气降水。金的沉淀通常与矿化流体的减压沸腾作用(不混溶性)有密切关系,不少浅成熟液金矿床,其中金的工业富集就是由于这种不混溶所引起。
This paper mainly introduces the fluid inclusions and isotopic study data of several typical gold deposits, as well as the characteristics of the mineralized fluids and the genesis patterns of the ore deposits derived from the results. Most primary gold deposits, regardless of their origin, have homogenization temperatures in the range of 100 ° C to 400 ° C. The fluid components are characterized by depleted NaCl and CO 2, especially gold deposits that are causally linked to metamorphic hydrothermal fluids. Fluids CO 2 is more common. Under normal circumstances, mineralization-related hot water salinity is less than 10wt%. The epithermal gold deposits are characterized by complex sources of ore-forming fluids, which can come from magmatic hydrothermal fluids and from atmospheric precipitation. The precipitation of gold is usually closely related to the decompression boiling (immiscibility) of mineralized fluids, and many shallow mature gold deposits, in which the industrial enrichment of gold is due to this immiscibility.