丹巴燕子沟金矿构造地质特征及找矿前景

燕子沟金矿床位于四川甘孜州丹巴县，永西穹窿核部。矿体主要呈透镜状、似层状赋存于泥盆系危关群浅变质黑色岩系中。矿体的形成与含金石英粗脉和细石英网脉有关，且受断裂控制明显。NNW向牦牛河断裂和EW向磨子沟断裂以及与之相配套的小断裂共同构成的米字型构造为成矿流体提供了良好的运移和储存空间。另外，岩浆、变质作用也对成矿起了重要的作用。根据已查明矿（化）体得知外围找矿必须受构造及赋矿岩层的控制，根据这一特点，对矿区外围及深部找矿起到了指导作用，对于在川西地区泥盆系危关群第四岩组碳质千枚岩中寻找似层状大型金矿具有重要意义。

Discussion on Gold Prospecting in Danba Yanzigou Gold Mine

Yanzigou gold deposit is located in Yongxi dome core of Ganzi Danba county in Sichuan province.Ore bodies like Lens and atoid ores occur in the devonian epimetamorphic black shale series.The formation of ore bodies has a close relationship with coarse gold-bearing quartz veins and fine quartz net ores and is obviously affected by the fault.NNW of Maoniuhe river fracture and EW of Mozigou fracture,as well as some related small fracture consist of a Mi-zi type structure which provides a good migration and storage space for ore-forming fluids.In addition,the magma and metamorphism also play an important role in mineralization.In accordance with the known ore bodies,the external exploration is controlled by the ore-body structure and the ore-occurred rocks.Based on these characteristics,it can play a guiding role in external exploration and provide a great significance to explore large atoid gold ores from the fourth formation carbonaceous phyllite in devonian of western Sichuan area. 