论文部分内容阅读
根据紫金山矿床不同位置和深度的蚀变岩石氧同位素组成变化特征，以及流体氢氧同位素和包裹体测温数据，讨论了成矿流体的来源及运移-反应机制。认为该矿床主要由大气降水的环流形成。大气降水下渗和上升排泄过程中，在不同的温度和W／R比条件下与围岩反应，发生氧同位素交换，从而造成了蚀变岩石氧同位素的空间变化。对岩石δ18O值的反演计算结果较好地证实了这-流体运移-反应成矿模式。
According to the characteristics of oxygen isotopic compositions of altered rock at different positions and depths of the Zijinshan deposit and the temperature data of hydrogen and oxygen isotopes and inclusions, the origin and migration-reaction mechanism of ore-forming fluids are discussed. The deposit is believed to be formed mainly by the circulation of atmospheric precipitation. Atmospheric precipitation infiltration and ascending excretion process, under different temperature and W / R ratio conditions react with the surrounding rock, oxygen isotope exchange occurs, resulting in spatial alteration of oxygen isotope of altered rock. The results of inversion of δ18O value of rock confirm the mode of fluid migration and reaction well.