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松喀尔苏铜金矿区位于卡拉麦里石炭纪陆相火山岩带。文章通过矿床地质、围岩蚀变、含矿斑岩、流体包裹体和同位素研究,探讨了矿床成因类型。研究表明,松喀尔苏矿床具斑岩型矿床的特征,铜金矿化体产于岩体接触带,围岩蚀变具有分带性,从岩体向围岩依次发育绢英岩化带、高岭石化带和青磐岩化带,绢英岩化带与成矿相关。含矿斑岩复式岩体系同期陆相火山活动产物,成矿作用在时间、空间和成因上与复式岩体中晚期花岗斑岩有关。花岗斑岩具有富水、富挥发性组分和岩浆爆破作用的氧化性岩浆特点,具有后碰撞花岗岩类的地球化学亲缘性,其岩浆起源于后碰撞挤压-伸展转换期的壳-幔岩浆过渡带。幔源岩浆注入、软流圈地幔底侵作用和壳-幔岩浆混合作用是形成含矿斑岩岩浆的主导因素。流体包裹体包括液相包裹体、气相包裹体和含子晶多相包裹体,激光拉曼探针分析表明,气相成分以CO2和CH4为主。成矿流体具有从高温、高盐度岩浆体系向低温、低盐度与大气降水混合的演化过程,流体沸腾或不混溶作用及温度、盐度降低是导致流体中成矿物质沉淀的主要因素。氢、氧同位素组成表明成矿流体以岩浆水为主,在成矿晚期混有大气降水。硫同位素具幔源硫的特征。铅同位素组成显示成矿作用起源于下地壳-上地幔过渡带的岩浆作用。综上所述,该矿床属于与陆相火山-侵入岩有关的斑岩型铜金矿床。
The Songkla Su-Cu gold deposit is located in the Karamayi Carboniferous continental volcanic belt. In this paper, through the study of deposit geology, wall rock alteration, ore-bearing porphyry, fluid inclusions and isotopes, the type of deposit is discussed. The results show that the Songkarsu deposit has the characteristics of porphyry deposits, the copper-gold mineralization is produced in the contact zone of the rock mass, and the alteration of the surrounding rock is zonable. From the rock mass to the surrounding rock, the sericite petrified belt , Kaolinite and Qingxiyan belt, and the sericite belt are related to metallogenesis. The ore-bearing porphyry complex rock system is the product of the terrestrial volcanic activity in the same period. The mineralization is related to the middle and late granite porphyry in the complex rock mass in terms of time, space and genesis. The granitic porphyry has the characteristics of oxidized magmatic water rich in water, volatile components and magmatic blasting, and possesses the geochemical affinity of the post-collisional granites. The magma originates from the crust-mantle of the post-collision crush-extension transition Magmatic transition zone. The mantle-derived magma intrusion, asthenospheric mantle underplating and crust-mantle magma mixing are the dominant factors in forming ore-bearing porphyry magma. Fluid inclusions include liquid inclusions, gas inclusions and intergranular inclusion inclusions. Laser Raman probe analysis shows that the gas components mainly consist of CO2 and CH4. The ore-forming fluid has the process of evolution from high temperature and high salinity magmatic system to low temperature, low salinity and precipitation, the fluid boiling or immiscibility and the decrease of temperature and salinity are the main factors leading to the precipitation of ore-forming materials . Hydrogen and oxygen isotopic compositions indicate that the ore-forming fluid is mainly magmatic water, and is mixed with atmospheric precipitation in the late stage of metallogenesis. Sulfur isotopes have mantle-derived sulfur characteristics. Lead isotopic composition indicates that the mineralization originated from the magmatic action of the lower crust-upper mantle transition zone. In summary, the deposit belongs to the porphyry copper-gold deposit associated with continental volcanic-intrusive rocks.