甘孜–理塘构造带金矿床控矿构造及成矿规律
Ore-Controlling Structure and Metallogenic Law of Gold Deposits in the Ganzi-Litang Tectonic Belt
DOI: 10.12677/ag.2025.1510129, PDF,   
作者: 张 颖, 刘 雷*:中国建筑材料工业地质勘查中心宁夏总队,宁夏 银川
关键词: 甘孜–理塘构造带金矿控矿构造成矿规律Ganzi-Litang Tectonic Belt Gold Mine Ore-Controlling Structure Metallogenic Law
摘要: 甘孜–理塘构造带作为三江特提斯复合造山带的关键构造单元,是川西地区最重要的金矿集中区之一。本文综合前人有关区域地质调查、矿床地质特征、同位素地球化学及构造演化数据资料,总结了该构造带内金矿床的主要控矿构造与成矿规律。金矿化主要受控于NW向韧性剪切带、次级断裂破碎带及层间滑脱构造,赋矿围岩以上三叠统曲嘎寺组蛇绿混杂岩为主。成矿流体具有变质水与大气降水混合特征,成矿物质主要来源于围岩地层中的火山–沉积建造。成矿作用与印支期洋壳俯冲、燕山期弧陆碰撞及喜山期陆内转换构造演化过程耦合,形成了以类卡林型和造山型为主的金矿类型。
Abstract: As the key tectonic unit of the Sanjiang Tethys composite orogenic belt, the Ganzi-Litang tectonic belt is one of the most important gold ore concentration areas in western Sichuan. In this paper, the regional geological survey, geological characteristics of the deposit, isotopic geochemistry and tectonic evolution are summarized, and the metallogenic and ore-controlling structure style and metallogenic law of the gold deposits in the structural belt are systematically analyzed. The results show that the gold mineralization is strictly controlled by the NW-trending ductile shear zone, the secondary fault fracture zone and the interlayer slip structure, and the ore-bearing surrounding rock is dominated by the ophiogreen mixed rocks of the Upper Triassic Qugasi Formation. The ore-forming fluids are characterized by the mixing of metamorphic water and atmospheric precipitation, and the minerals are mainly derived from volcanic-sedimentary formations in the surrounding rock strata. The metallogenesis was coupled with the indosinian oceanic crust subduction, the Yanshanian arc-continent collision and the intracontinental transformation tectonic evolution process of the Himalayan period, forming a gold deposit type dominated by Carlin-like and orogenic types.
文章引用:张颖, 刘雷. 甘孜–理塘构造带金矿床控矿构造及成矿规律[J]. 地球科学前沿, 2025, 15(10): 1396-1402. https://doi.org/10.12677/ag.2025.1510129

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