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敖仑花钼铜矿床是近年来新发现的大型斑岩型钼铜矿床,该矿床钼铜矿化多产于敖仑花岩体内及外接触带的角岩中,矿化类型主要为细脉浸染状。矿石矿物为辉钼矿、黄铜矿、黄铁矿、闪锌矿、方铅矿等。敖仑花岩体为中酸性的花岗闪长斑岩体,岩石SiO2、Al2O3、K、Na含量较高,Na2O/K2O比值在1.1～2.1之间,σ值在3～3.7之间,A/CNK值小于1,0.68～0.82,属于偏钠质的高钾钙碱性Ⅰ型花岗岩。矿床的围岩蚀变类型从中心向外依次为石英-钾硅酸化、石英-绢云母化、角岩化,其中钾硅酸盐化和绢云母化叠加带与钼矿化空间分布关系密切;据包裹体测温结果显示,该矿床成矿温度和盐度较高,属于中高温热液斑岩型钼矿床。矿区硫化物的δ34S值变化范围较小,介于-1.2‰～3.5‰,平均为1.78‰,结合岩浆岩演化等特征表明,成矿作用与中酸性含矿斑岩关系密切,并可能受幔源岩浆混合作用的影响。
Aolunghua molybdenum-copper deposit is a newly discovered large-sized porphyry molybdenum-copper deposit newly discovered in recent years. The molybdenum-copper mineralization of this deposit is prolific in the hornfels in the body and outer contact zones of the AoLanghua rock. The mineralization types are mainly Fine vein disseminated. Ore minerals are molybdenite, chalcopyrite, pyrite, sphalerite, galena and so on. The Aolunghua granulite is a moderately acidic granodiorite porphyry with higher SiO2, Al2O3, K and Na contents, Na2O / K2O ratios between 1.1 and 2.1, σ between 3 and 3.7, and A / CNK value less than 1,0.68 ~ 0.82, belongs to the partial sodium high-K calc-alkaline type I granite. The type of wall rock alteration in the deposit is quartz-potassium silicate, quartz-sericitization and hornfaction from center to outside. The potassium-silicate and sericitization superimposed zones are closely related to the spatial distribution of molybdenum mineralization. According to the temperature measurement of the inclusions, the ore-forming temperature and salinity of the deposit are high, belonging to the mid-high temperature hydrothermal porphyry-type molybdenum deposit. The δ34S value of the sulfide in the mining area is relatively small, ranging from -1.2 ‰ to 3.5 ‰, with an average of 1.78 ‰. Combined with the characteristics of magmatic rock evolution, the mineralization is closely related to the moderately acidic ore-bearing porphyry and may be affected by mantle Effect of Source Magma Mixing.