福清东仔叶蜡石矿床成矿机理及成矿模式

The Minerogenic Mechanism and Model of Dongzai Pyrophyllite Deposit in Fuqing

稀土地球化学表明，叶蜡石矿床与早白垩世火山热液活动具有成矿专属性。成矿机理是：弱酸一弱碱气液与晚侏罗系火山岩长期作用导致蚀变、交代和矿化。成矿受火山机构控制。成矿类型是火山气液交代型。最后提出了成矿地球化学模式。

Ree geochemistry shows pyrophyllite deposit is of specialization with Lower: Cretaceousvolcanic hydrothermal activity. The minerolization mechaism is that the week acidic to week alkalinehydrothermal solution acted with the Upper Jurassic volcanic rocks for a long time and resulted inmetasomatism and alternation and minerolization. This deposit is fu1ly controlled by the vo1canic apparatus.The mineral deposits may be regarded as that of the volcanic hydrothermal replacement type- Finally amineralization geochemistry model is preposed.