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新疆萨热克大型铜矿床含矿地层为上侏罗统库孜贡苏组砂砾岩,与下伏下-中侏罗统煤矿形成“同盆共存”现象。萨热克铜矿石中碎裂岩化发育,并伴有沥青化,金属硫化物以辉铜矿为主,含少量的斑铜矿和黄铜矿等,多与次生石英-方解石等沿砾石裂隙分布。矿石中辉铜矿δ34S=-19.1‰~-13.2‰,辉铜矿206Pb/204Pb比值范围为16.699~18.417,207Pb/204Pb为15.294~15.684,208Pb/204Pb为36.909~38.996。次生石英流体包裹体的δ18OH2O值变化范围为17.9‰~20.6‰,δDV-SMOW变化范围为-82.6‰~-52.4‰。矿石中沥青δ13C变化范围为-20.79‰~-20.35‰,康苏组煤岩δ13CV-PDB值变化范围为-24.7‰~-24.3‰,两者较为接近。上述结果表明萨热克铜矿床中的硫源自地层中大量硫酸盐的还原作用,铅同位素指示成矿金属元素具有多元性,次生石英中成矿流体以变质流体为主,矿石中的沥青等有机质与下伏中-下侏罗统煤层等烃源岩有关。上述同位素资料结合矿床的地质特征显示萨热克铜矿床具有多期多阶段的成矿特征。
The ore-bearing strata of the Thazeq large-scale copper deposit in Xinjiang are the conglomerate of the Upper Jurassic Kuzi-Gengsu Formation that forms a coexistence with the basin under the Lower-Middle Jurassic coal mine. The meticulous metamorphism developed in the Sagrek copper ores, accompanied by bitumenization, is characterized mainly by chalcocite, with a small amount of bornite and chalcopyrite, etc., mostly along with secondary quartz-calcite Gravel fracture distribution. In the ore, the chalcopyrite δ34S = -19.1 ‰ ~ -13.2 ‰, the Chalcocite 206Pb / 204Pb ratio ranged from 16.699 to 18.417, and the 207Pb / 204Pb from 15.294 to 15.684,208Pb / 204Pb ranged from 36.909 to 38.996. The δ18OH2O value of the secondary quartz fluid inclusions ranged from 17.9 ‰ to 20.6 ‰, and the δDV-SMOW ranged from -82.6 ‰ to -52.4 ‰. The variation of δ13C in ore is -20.79 ‰ -20.35 ‰, and that of Kangsu Formation is -24.7 ‰ ~ -24.3 ‰, which is close to the value of δ13CV-PDB. The above results show that the sulfur in the Saratok copper deposit originates from the reduction of a large amount of sulfate in the strata. Lead isotopes indicate the diversity of ore-forming metal elements. The ore-forming fluids in the secondary quartz are mainly metamorphic fluids. Organic matter such as bitumen is related to source rocks such as the Lower-Middle Jurassic coal seam. The above-mentioned isotopic data combined with the geological characteristics of the deposit show that the Sakeke copper deposit has multi-stage and multi-stage metallogenic characteristics.