中文摘要:文章首次对内蒙古东乌珠穆沁旗沙麦钨矿床的石英流体包裹体进行了均一温度、盐度和成分测试，并分析了主成矿期石英流体包裹体的氢、氧同位素组成。结果表明，沙麦钨矿床成矿流体为中_高温、中低盐度的H2O-NaCl-CO2±CH4流体体系，系岩浆演化热液与大气降水的混合产物。花岗质岩浆不仅从深部携带了成矿物质，而且带来了巨大热能，在自身发育的断裂系统内引起热液的对流循环和混合，导致了钨的沉淀。
Abstract:Located in the eastern part of the Central Asian Palaeozoic orogenic belt, the Shamai tungsten deposit is one of the most important tungsten deposits in northeast China. Tungsten mineralization occurs mainly as wolframite_bearing quartz veins within Late Yanshanian grantoids, and partly as greisen veins in association with wolframite_bearing quartz, controlled by a series of NW_trending fracture zones. An individual tungsten body can be traced along the strike for 645 m, and down the dip for 265 m, with an average thickness of 1.58 m. Alterations are relatively simple and consist of ferri_muscovitization, silication, greisenization and pyritization. Two types of tungsten ores, namely quartz vein type and greisen type, can be identified, with their average WO3 content being 2.03% and 0.48% respectively. Ore minerals mainly include wolframite, scheelite, pyrite, chalcopyrite, bornite, molybdenite, arsenopyrite, galena, pseudoganela, malachite, azurite and hydroferrite. Gangue minerals consist of quartz, muscovite, ferri_muscovite, biotite, K_feldspar, albite, topaz, tourmaline and fluorite. The fluid inclusions in quartz from granite, greisen and tungsten_bearing quartz veins were studied, and the result shows that the ore_forming fluids are of the intermediate_ or low_salinity H2O_NaCl_CO2±CH4 system. Combined with the oxygen isotope features, it is concluded that the ore_forming fluids seem to be a mixed product of elevated magmatic fluid and low_temperature meteoric water. The granite magma not only carried ore_forming materials from the deep crust but also provided tremendous heat, which resulted in the circulation and mixing of ore_forming fluids in the superficial crust, thus forming the quartz_vein type tungsten deposit.
文章编号：
中图分类号：
文献标志码：
基金项目:中国地质调查局地质调查综合研究项目(200310200001_01)
引用文本：
胡 朋，聂凤军，赫 英，张 义，刘 妍.2005.内蒙古沙麦钨矿床地质及流体包裹体研究[J].矿床地质,24(6):603~612.2005.Geological features and fluid inclusions of Shamai tungsten deposit, Inner Mongolia[J].Mineral Deposits24(6):603~612
图/表
