The world‐class Poderosa‐Pataz district is famous for its gold endowment in vertically and laterally extensive quartz‐sulphide veins. Precipitating mechanisms are investigated to determine why gold is so laterally and vertically distributed. Micro‐XRF and LA‐ICP‐MS element mapping of pyrites surrounding gold grains reveals systematic enrichment of As around or near visible gold accumulations. These As‐enriched zones define discordant rims and corridors overprinting pyrites. LA‐ICP‐MS spot analyses performed within and outside the As enrichment zones indicate that As is enriched on average by two orders of magnitude in association with gold. Secondary pyrite transformation by hydrothermal fluids with elevated As‐Au induced a change in the semiconducting properties of pyrite grains, resulting in the precipitation of visible gold particles at the interfaces of As‐enriched zones. The electrochemical precipitation mechanism acted as a filter to extract gold in solution regardless of variations in pressure and temperature, hence explaining the vertically and laterally extensive gold mineralization.

中文翻译：

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电化学金析出解释了秘鲁世界级Poderosa-Pataz地区广泛的垂直和横向矿化

世界一流的Poderosa-Pataz区以其在垂直和横向广泛的石英硫化物脉中的金end赋而闻名。对沉淀机理进行了研究，以确定为什么金在横向和纵向上如此分布。围绕金颗粒的黄铁矿的Micro-XRF和LA-ICP-MS元素图谱揭示了可见金矿附近或附近的砷的系统富集。这些富As区域定义了不协调的边缘和覆盖黄铁矿的走廊。在As富集区内外进行的LA‐ICP-MS现场分析表明，As与金结合平均富集了两个数量级。As-Au升高的热液对黄铁矿的二次转化导致黄铁矿晶粒的半导体性质发生变化，导致可见的金颗粒在富As区的界面处沉淀。不管压力和温度如何变化，电化学沉淀机理都可以作为过滤器提取溶液中的金，从而解释了在垂直和横向广泛的金矿化。