【摘要】 野鸡尾石英斑岩在燕山晚期侵入泥盆系中,按其岩石化学特征应属富硅富钾贫钙贫镁贫铁的钙碱性系列岩石.其铷-锶同位素年龄为84百万年。石英斑岩全岩都发生了矿化,主要矿体产于石英斑岩的中上部。围岩蚀变主要有钾化、硅化、绢云母化、云英岩化、萤石化。其中云英岩化与矿化关系最密切。铷-锶、铅、硫同位素研究表明,硫、锡主要来源于岩浆。矿床成因类型应属地洼区内所特有的斑岩型高中温热液锡矿床。更多还原

【Abstract】 The Yiejiwei quartz-porphyry intruded into the Devonian during the late Yanshanian. It is rich in silicon and alkali, but poor in calcium magnesium and iron, belonging to calc-alkaline rock. Its Rb-Sr isotopic age is 84 my. The whole quartz-porphyry body was mineralized. The main ore body occurs in the upper quartz-porphyry. Alterations of wall rocks are mainly K-feldspathization, silication, sericitization, fluorition and greiseniztion. Close relationship between greisenization and minerogenesis is verified by Sr, S and Pb isotopes. The deposit is a porphyry type medium-high temperature hydrothermal tin deposit peculiar to a diwa region.更多还原