川西地区似层状金矿的新发现

燕子沟金矿床位于川西永西穹窿核部。矿体主要呈透镜状、似层状赋存于泥盆系危关群第四岩组炭质千枚岩中。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。北北西向的东谷断裂和东西向的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。据调查,燕子沟金矿是川西地区发现的首例似层状金矿体。这一新发现对于在川西地区泥盆系危关群第四岩组炭质千枚岩中寻找似层状大型金矿具有重要意义。

New Discovery of Layered Gold Deposit in Western Sichuan

Yanzigou gold deposit lies in the middle of Yongxi fornix,which is in county Danba,Sichuan province.The main ore occurs in epimetamorphic black shale series in Devonian Weiguan group.The Ore forming is related to gold-bearing quartz veins,and is obviously controlled by fracture.The "X"type structure constituted by NNE striking Donggu fault and WE striking Mozigou fault and other small faults provides great migration and storage space for the ore-forming fluid.Accord ing to the surveys,it is the first discovery of bedded gold deposit in western Sichuan.This new discovery has important signifi cance for gold mining in black shale series in Devonian Weiguan group in western Sichuan.