大箐铜矿含矿岩石包裹体研究

RESEARCH ON THE INCLUSIONS OF OREBEARING ROCKS OF DAQING COPPER DEPOSIT

大箐含铜岩石第一世代白云石是火成矿物，具高温晶体包裹体构成的嵌晶结构，含碳酸质和硅酸质熔融包裹体，流体包裹体及其均一温度可分为原生型的多相含子晶（＞４５０℃）及二相含子晶（４００℃～２５０℃）和次生型的气液两相（２００℃～１００℃）三组，主矿物与熔融包裹体化学成分相近。结合其他地质证据证明含铜岩石是火成碳酸岩，包括碳酸质熔岩和碳酸质火山碎屑岩。这套岩石还遭受后期变质改造和热液蚀变，因而复杂化。

The first generation dolomites of Daqing copperbearing rocks are igneous, with high temperature microcrystals inclusions(to form poikilitic texture), carbonatic and sillicatic melt inclusions,and fluid inclusions which as well as their homogenization termperature can be classified into three groups:primary multiphase ones(>450℃),twicephase ones(400℃～250℃) with subcrystals in, and secondary twice-plase(gas+liquid) ones(200℃～100℃). 