穆龙套-萨瓦亚尔顿-库姆托尔金矿带典型矿床的对比研究
Comparative Study on Typical Deposits in the Muruntau-Sawayardun-Kumtor Gold Belt
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摘要: 南天山金矿带是世界上一个重要的金矿资源地,产出数个超大型金矿.这些矿床有许多共同点:如大地构造背景、构造环境、含矿岩系、容矿岩石、控矿构造、矿体形态、矿石类型、主要金属矿物、载金矿物、围岩蚀变、成矿时代和成矿方式等相似.但是,进一步分析可以发现他们之间也存在一定差异.例如,在构造位置、物质成分、围岩蚀变等方面存在差异.对本区一些基本的成矿特征进行分析后,认为矿带的形成与南天山造山带的形成和演化关系密切,华力西期与花岗岩活动有关的热液成矿作用应是主要的成矿作用.因此,该矿带应属于细脉浸染型金矿较为合适.南天山尚有寻找此类金矿的远景.Abstract: The gold belt in Southern Tianshan is an important gold resource, where a number of very large gold mines have been found. These deposits are similar in tectonic setting, ore-bearing rock series, host rocks, ore-controlling structures, ore body, ore type, main metallic minerals, gold-bearing mineral, metallogenic epoch and pattern of metallogeny. However, further analysis found that there had been some differences among them, such as structural location, material composition and wall rock alteration. Analyzing some basic metallogenic characteristics of this district, we believe that the formation of the gold belt is closely related to the formation and evolution of the southern Tianshan orogenic belt. The main mineralization is the Variscan hydrothermal mineralization related to the activities of granite, and therefore the deposits should be veinlet-disseminated type gold deposits. This is an important gold type with great prospecting potential in southern Tianshan.
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Key words:
- Central Asia /
- southern Tianshan /
- Variscan orogenic belt /
- gold deposit /
- veinlet-disseminated type
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