【摘要】 <正> 闽浙沿海,广泛分布中生代酸性—中酸性火山岩系。盛产叶蜡石、明矾石等非金属矿产。尤其是其中的福州寿山、浙江青田所产的叶蜡石(俗称寿山石)早已驰名中外。此次我们毕业实践研究的对象——福州峨嵋叶蜡石矿区,经勘探证实亦为叶蜡石矿区,且伴生有明矾石矿体。此外福建的其他地区亦具相当规模。更多还原

【Abstract】 The Emei pyrophyllite ore district is localized in the middle part of eastern Fujian volcanic eruptive belt, within the Mesozoic fault mobile zone along the coast region of Fujian and Zhejiang. Upper Jurassic (J3n) Nan Yan Formation, which is composed mainly of rhyolitic crystalclastie tuff-lava, rhyolite and rhyolitic crystal tuff, is widely distributed throughout this region. Pyrophyllite and alumstone ore bodies occur principally in the rhyolitic crystal tuff and volcanie breccia-bearing tuff in the IV lithofacies of the Nan Yan Formation. As a result of hydrothermal metasomatism closely related to volcanic activities, pyrophyllitization, silicification and alunitization, empholitization, pyritization, and etc. are extensively developed, causing a systematic migration, enrichment and resetting of the constituents in the tuffs.更多还原