FEATUKE OF FLUID INCLUSION AND ITS SIGNIFICANCE IN YIXINGZHAI GOLD DEPOSITS,SHANXI PROVINCE
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摘要: 对山西省义兴寨金矿的流体包裹体进行了详细研究,测试样品为本区的花岗岩、花岗斑岩、多金属硫化物含金石英脉、黄铁矿含金石英脉、片麻岩和伟晶岩6种。研究发现有四个类型的流体包裹体:Ⅰ1,富液相气液包裹体、Ⅰ2富气相气液包裹体、Ⅱ含CO2包裹体和Ⅱ含NaCl子晶多相包裹体。在矿石样品中可见到沸腾包裹体群发育,沸腾机制是热液运移时遇到火山通道及断裂而产生的压力下降。含矿石英脉的包裹体与次火山岩脉的包裹体特征十分相似,说明二者的热液具同源性。Abstract: The fluid inclusion of Yixingzhai gold deposits of Shanxi province are studied in detail. The six types of samples are granite, granite-porphyry, polymetallic sulfide-gold quartz vein, pyrite-gold quartz vein, gneiss and pegmatite. After studying the fluid inclu-sions, we discover out the four types of fluid inclusions in these samples:Ⅰ1 liquid-rich in-clusion;Ⅰ2 gas-rich inclusion;Ⅱ inclusion containing liquid CO2 and Ⅲ multiphase inclu-sion composed of gas, liquid and danghter mineral.we also found the boiling fluid inclusion group in the ore samples, The boiling mechanim is related with an abrupt pressure drop when the ore-beating liquid went into the volcanic conduits and fracture belt.The both in-clusions characters in ore bearing quartz vein and subvolcanic rock vein are the similar, which shows the two kinds of liquids are cogenetic.
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