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乌日尼图钨钼矿位于内蒙古苏尼特左旗境内,是近几年该区新发现的较大规模的钨钼矿床.钨钼矿体主要产于燕山期花岗岩体的内外接触带附近,以细脉状矿化类型为主.该矿床中的流体包裹体主要发育气液两相、富气相、富液相和纯液相包裹体等类型.包裹体均一温度为130.0～371.7℃(峰值为160.0～260.0℃),盐度为0.2%～15.9%NaCl eqv(峰值为0.2%～12.5%NaCl eqv),属于中低温、中低盐度钨钼矿床.激光拉曼和群体包裹体成分分析结果表明,流体体系气相成分以H2O、CO2为主,其次为N2、O2以及少量CO、CH4、C2H2、C2H4和C2H6等;液相成分以Ca2+、Na+、SO42-、Cl-为主,其次为K+、F-、NO3-、Mg2+以及少量Br-和Li+.成矿流体为H2O-NaCl-CO2体系.流体包裹体氢氧同位素分析表明,成矿流体的δ18O水的含量范围为-2.11%～-0.11%,δD水的含量范围为-85%～-108%,成矿流体为岩浆水与大气降水的混合物.结合矿床地质和成矿流体特征,认为该矿床为与燕山期岩浆活动有关的中低温热液石英脉型钨钼矿床,成矿物质以深源为主.
Located in the Sunitezuo Banner of Inner Mongolia, Wuriti Tungsten-Molybdenum Ore is a newly discovered large-scale tungsten and molybdenum deposit in the area in recent years.The tungsten and molybdenum ore bodies are mainly produced near the internal and external contact zones of the Yanshanian granite body, The main fluid inclusions in this deposit are mainly gas-liquid two-phase, gas-rich phase, liquid-rich phase and pure liquid inclusions, etc. The homogenization temperature of the inclusions is 130.0 ~ 371.7 ℃ (peak (From 160.0 to 260.0 ℃) and salinity from 0.2% to 15.9% NaCl eqv (peak from 0.2% to 12.5% NaCl eqv), belonging to middle-low temperature and middle-low salinity wolfram-molybdenum deposit.The composition of laser Raman and group inclusions The results show that the gas components of the fluid system are mainly composed of H2O and CO2, followed by N2, O2 and a small amount of CO, CH4, C2H2, C2H4 and C2H6. The liquid components are mainly Ca2 +, Na +, SO42- and Cl-, followed by The ore-forming fluid is H2O-NaCl-CO2 system.The isotope analysis of hydrogen and oxygen in fluid inclusions shows that the content of δ18O water in ore-forming fluid ranges from -2.11% -0.11% δD water content range of -85% ~ -108%, the ore-forming fluid is a mixture of magmatic water and atmospheric precipitation combined with the geological and mineral deposits Wherein the fluid deposit, the deposit is considered epithermal quartz vein tungsten - molybdenum ore and magmatic activities related to deep into the mineral-based.