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卡拉盖雷铜金矿床位于新疆西天山那拉提构造带境内西段,为近年在该成矿带内发现的首例以Cu为主,伴生Au、Co等的火山岩型热液矿床。δD、δ18O分析结果表明,成矿流体在早—中阶段以岩浆热液为主,晚阶段有大气降水加入。δ34S分析结果表明,硫源主要来自深部地壳或上地幔,并有地层硫混入。铅同位素分析表明,矿区铅源为壳、幔混合俯冲带铅。辉钼矿的Re-Os同位素模式年龄为(259.6±9.7)Ma,说明矿床早阶段的成矿年龄为早二叠世末期。笔者进一步探讨了矿床成因,认为大哈拉军山组火山岩为早期矿源层;在晚石炭世后碰撞伸展阶段,来自地壳深部的含矿岩浆热液沿区域深大断裂、火山通道及浅部断裂系统运移并萃取早期矿质元素,于有利构造部位形成矿体。
The Kararagé copper-gold deposit is located in the western segment of the Nalati structural belt in the West Tianshan, Xinjiang. It is the first volcanic-type hydrothermal deposit discovered in this metallogenic belt in recent years and mainly characterized by Cu and accompanying Au and Co. The results of δD and δ18O indicate that the ore-forming fluid is dominated by magmatic hydrothermal fluid in the early-middle stage and atmospheric precipitation in the late stage. δ34S analysis results show that the sulfur source mainly comes from the deep crust or upper mantle and the formation sulfur is mixed in. Lead isotope analysis shows that the lead source in the mining area is crust and mantle mixed with lead. The Re-Os isotopic pattern age of molybdenite is (259.6 ± 9.7) Ma, indicating that the ore-forming age of the early stage of the deposit was the end of the Early Permian. The author further explores the genesis of the deposit and thinks that the volcanic rocks in the Dahalajun mountain group are early mineralized strata. During late Carboniferous post-collision extensional stage, the ore-bearing magmatic hydrothermal fluids from deep crust along the deep faults, volcanic channels and shallow faults The system migrates and extracts early mineral elements and forms ore bodies at favorable structural sites.