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首页> 外文期刊>Journal of Volcanology and seismology >Volcanism and epithermal deposits
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Volcanism and epithermal deposits

机译：火山和超热沉积

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Epithermal mineralization is an important metallogenic criterion for volcanogenic belts of varying ages. We show that epithermal high-sulfidation deposits are shallow formations in volcanogenic belts, with low-sulfidation deposits being formed at the subvolcanic level and the intermediate between the two types being the deepest deposits. Regenerated deposits make up their own group. Deposits of each type have been characterized. Typical epithermal deposits had been formed before a granitoid plutonic source came into being. The abundance of quartz-chalcedony amygdules in basaltoids that are found in several ore areas can be explained by their temporal connections to hydrothermal systems that stopped functioning during and after the emplacement of basaltic magmas. It is hypothesized that the concentration of post-mineralization basaltoid dikes within ore fields of epithermal deposits was due to the activity of a "microplume," which was the cause of late (rhyolite and granitoid) magmatism, hydrothermal activity, and epithermal mineralization.
机译：超热矿化是不同年龄火山成因带的重要成矿标准。我们表明，超热高硫化物沉积物是火山成因带中的浅层地层，低硫化物沉积物是在次火山岩水平上形成的，两种类型之间的中间是最深的沉积物。再生的存款构成了自己的群体。每种类型的沉积物都有特征。典型的超热沉积物是在花岗岩类的古生物来源形成之前就形成的。在几个矿区中发现的玄武岩中石英-杏仁核杏仁核丰富，可以用它们与热液系统的暂时联系来解释，这些热液系统在玄武岩浆沉积期间和之后都停止了作用。假设超热矿床矿床中的矿化后玄武岩堤防的浓度是由于“微泥岩”的活动引起的，这是后期（流纹岩和花岗岩）岩浆作用，热液活动和超热矿化的原因。

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