【摘要】 通过野外调查、岩相学、矿物化学和岩石地球化学研究，认为泥盆纪以酸性海相火山岩为主的含矿岩系下部富钠和上部富钾是交代变质作用的产物；通过碱交代作用的热力学计算，初步认为：在对流循环成矿模式中，下降的海水被加热时由于温度的升高发生钠交代作用，成矿流体在运移和喷出过程中由于温度的降低而发生钾交代作用。更多还原

【Abstract】 Based on field survey,petrography,geochemistry of rocks and minerals, it is held that Na enrichment in lower and K enrichment in upper of the Devonian acid marine volcanic rocks-dominate ore-bearing strata result from metasomatism. The thermodynamic calaulation indicates that when the descending sea water is heated in the convention-circulation of fluid, the sodium metasomatism takes place due to temperature rising, and that the potassium metasomatism takes place due to falling of temperature in the migration and exhalation of ore-forming fluid.更多还原