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塔吾尔别克金矿床是西天山吐拉苏断陷盆地中一个重要的金矿床。矿体主要赋存于早石炭世二长斑岩及大哈拉军组第五岩性段安山岩、蚀变凝灰岩中,受断裂构造控制,矿床围岩蚀变作用普遍而强烈。矿石金属矿物主要为黄铁矿、自然金、赤铁矿和黄铜矿等,非金属矿物主要为石英、斜长石、方解石等。成矿过程大致划分为3个成矿阶段:1石英-黄铁矿阶段;2石英-硫化物脉阶段;3石英-碳酸盐阶段。石英及方解石中流体包裹体类型简单,主要为气液两相水包裹体和纯液相水包裹体。包裹体测试均一温度为100~196℃,流体盐度为0.0%~7.3%(质量分数,NaCl_(eq)),流体密度为0.9~1.0 g/cm~3,计算出成矿压力为5.2~81.9 MPa,对应成矿深度为0.5~7.4 km。塔吾尔别克金矿床成矿流体包裹体显示低温度、低盐度和较低密度的流体特征,表明成矿压力小和深度较浅。结合矿床地质特征、流体包裹体特征及前人研究成果,初步认为该矿床为浅成低温热液型金矿床。
The Uyghur Buick gold deposit is an important gold deposit in the Tulusu fault basin of the Western Tianshan Mountains. The orebodies mainly occur in the Early Carboniferous Peridotites and the Dahala Formation fifth andesite and alluvial tuff, which are controlled by the fault structure. The alteration of the surrounding rock in the orebodies is widespread and intense. Ore metal minerals are mainly pyrite, natural gold, hematite and chalcopyrite, non-metallic minerals are mainly quartz, plagioclase, calcite and so on. The ore-forming process is roughly divided into three metallogenic stages: 1 quartz-pyrite stage; 2 quartz-sulfide veins stage; and 3 quartz-carbonate stage. The types of fluid inclusions in quartz and calcite are simple, mainly gas-liquid two-phase water inclusions and pure liquid water inclusions. The fluid inclusions have a uniform temperature of 100 ~ 196 ℃, fluid salinity of 0.0 ~ 7.3% (mass fraction, NaCl eq) and fluid density of 0.9 ~ 1.0 g / cm ~ 3. 81.9 MPa, corresponding to the depth of 0.5 ~ 7.4 km. The ore-forming fluid inclusions in the Uygur Buk-Au gold deposit show low temperature, low salinity and low density fluid characteristics, indicating that the ore-forming pressure is small and the depth is shallow. Combined with the geological characteristics of the deposit, the characteristics of fluid inclusions and the previous research results, it is preliminarily considered that the deposit is a epithermal-type gold deposit.