| 新疆西昆仑成矿带阔克吉勒嘎超大型金矿床的发现及其意义 |
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| 引用本文：何福保,张阳,段彬,张建奎,尹得功,孟宝东,冯昌荣,卢腾,龚婷婷,加尔肯别克·买买尼,赵明金,三金柱,李凤明,尚海军,方向,王志亮,邓秋平,谢月桥.2025.新疆西昆仑成矿带阔克吉勒嘎超大型金矿床的发现及其意义[J].地球学报,46(6):1033-1038. |
| DOI：10.3975/cagsb.2025.110101 |
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| 基金项目:“新疆阿克陶县阔克吉勒嘎一带金矿普查”(编号: K25-XJ028)；中央财政出资项目“西昆仑金多金属矿找矿勘查与增储示范”(编号: 2025ZD1009404);深地国家科技重大专项(编号: 2025ZD1009400) |
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| 中文摘要:新疆西昆仑铁-铜-金-铅锌-钼-水晶-白云母-玉石-石棉矿成矿带位于特提斯和古亚洲洋两大全球构造成矿域交汇处, 成矿地质条件优越, 经历多期次构造演化(大洋俯冲, 大陆碰撞, 陆内造山、伸展), 发育多期次多类型岩浆活动, 形成大规模断裂系统。近年来, 新疆地质局喀什地质大队依托新疆维吾尔自治区财政出资项目在西昆仑西段开展金矿地质调查, 首次发现上百千米长、数千米宽的产于韧-脆性构造带的金矿化, 探获阔克吉勒嘎超大型金矿床, 取得金矿重大找矿突破。主要金矿体产于下志留统温泉沟群含碳酸盐硬绿泥绢云千枚岩; 延伸达上百公里主干断裂控制了区域和矿区构造单元、地层、化探异常及金矿化带的分布, 构造带具强烈的韧-脆性剪切变形特征, 是主要容矿和控矿构造。区内岩浆岩不发育; 石英脉分布广泛, 沿构造走向成群成带发育, 是主要的含金脉体; 矿石主要呈稀疏浸染状-星散状产出, 局部发育细脉浸染状、团块状、条带状矿石; 矿石金属矿物以毒砂、黄铁矿、黄铜矿、自然金为主, 发育少量方铅矿、磁铁矿、褐铁矿等; 热液蚀变发育绿泥石化、白(绢)云母化、碳酸盐化、硅化、硫化物化等。初步研究认为阔克吉勒嘎金矿是与韧-脆性剪切带有关的构造蚀变岩型金矿床, 西昆仑克成矿带阿克陶一带金资源潜力可达世界级规模, 找矿潜力巨大, 其发现可为区域同类型金矿的寻找提供重要借鉴, 对新疆西昆仑金腰带的构建具有重要 意义。 |
| 中文关键词:金矿 韧性剪切带 构造蚀变岩 阔克吉勒嘎 西昆仑成矿带 |
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| Discovery and Significance of the Kuokejilega Super-large Gold Deposit in the West Kunlun Metallogenic Belt, Xinjiang |
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| Abstract:The West Kunlun Fe-Cu-Au-Pb-Zn-Mo-rock crystal-muscovite-jade-asbestos metallogenic belt in Xinjiang is lo-cated at the convergence of two major global tectonic-metallogenic domains, the Tethys and Paleo-Asian oceans. It boasts exceptional metallogenic geological conditions, having undergone multi-stage tectonic evolution (in-cluding oceanic subduction, continental collision, intracontinental orogeny, and extension), accompanied by mul-ti-phase and diverse magmatic activities, which caused the formation of large-scale fault systems. In recent years, supported by projects financed by the Xinjiang Uygur autonomous region, the Kashi Geological Team of the Xinjiang Bureau of Geology have conducted gold geological surveys in the western segment of the West Kunlun Mountains. This work led to the first discovery of gold mineralization within a ductile-brittle structural zone, extending hun-dreds of kilometers in length and several kilometers in width. Representing a major breakthrough in gold explora-tion, the Kuokejilega super-large gold deposit was also identified. The main gold orebodies are hosted in the Lower Silurian Wenquangou Formation and composed of carbonaceous-bearing chloritoid-sericite phyllite. The master faults, extending hundreds of kilometers, control the distribution of regional and mine-scale structural units, strata, geochemical anomalies, and the gold mineralization zone. These structural zones exhibit intense ductile-brittle shear deformation characteristics and constitute the primary ore-hosting and ore-controlling structures. Magmatic rocks are not well developed in the area. Quartz veins, representing the principal gold-bearing vein, are widespread and oc-curring in clusters and zones along the structural trends. The ore primarily exhibits a sparsely disseminated to scat-tered distribution, with local development of stockwork-disseminated, massive, and banded ores. The metallic minerals are dominated by arsenopyrite, pyrite, chalcopyrite, and native gold, with minor amounts of galena, magnetite, and limonite. Hydrothermal alteration includes chloritization, sericitization, carbonatization, silicifi-cation, and sulfidation. Preliminary studies suggest that the Kuokejilega gold deposit is a structure-altered rock type gold deposit associated with a ductile-brittle shear zone. The gold resource potential in the Akto area of the West Kunlun metallogenic belt is estimated to have tremendous prospecting potential. Its discovery provides an important model for exploring similar types of gold deposits in the region and holds significance for establishing a gold belt in the West Kunlun of Xinjiang. |
| keywords:gold deposit ductile shear zone structural altered rock Kuokejilega West Kunlun metallogenic belt |
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