山西义兴寨金矿流体包裹体的特征及意义

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。

FEATUKE OF FLUID INCLUSION AND ITS SIGNIFICANCE IN YIXINGZHAI GOLD DEPOSITS,SHANXI PROVINCE

Abstract The fluid inclusion of Yixingzhai gold deposits of Shanxi province are studied in de -tail． The six types of samples are granite，granite- porphyry，polymetallic sulfide- goldquartz 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:Ⅰ_1 liquid-rich in-clusion；Ⅰ_2 gas-rich inclusion；Ⅱ inclusion containing liquid CO_2 and Ⅲ multiphase inclu-sion composed of gas，liquid and danghter mineral．we also found the boiling fluid inclusiongroup in the ore samples，The boiling mechanim is related with an abrupt pressure dropwhen 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，whichshows the two kinds of liquids are cogenetic.