四川省葫芦沟金矿床地质特征及成因分析

The Geologic Characteristic and Genesis of Hulugou gold deposit,Sichuan, China

葫芦沟金矿区处于扬子、印度、华北三板块会聚所形成的"川、甘、陕金三角"巴颜喀拉推覆造山带与南秦岭推覆造山带接合地带荷叶深大断裂南侧。矿区内出露主要地层为泥盆统三河口组,岩性主要为绢云母板岩、绢云母粉砂质板岩、微晶灰岩。岩浆岩主要为印支期及燕山期花岗斑岩、花岗闪长岩、闪长玢岩、花岗细晶岩。矿区构造较复杂,主要断裂带为成矿提供了较好的容矿导矿构造。本文通过介绍区域地质背景,矿区地质特征,初步分析了葫芦沟金矿的成因,认为该矿床属于岩浆热液型。

Hulugou gold deposit is located in South side of fault which is combined with Bayankala nappe orogenic belt and South Qinling nappe orogenic belt,caused by Yangzi,Yindu,Huabei plate convergence. The main exposure stra in the digging is Sanhekou formation,Devonian. The lithology in mainly sericite slate, sericite silty slate,micrite. The magmatic rock are mainly granite porphyry,granodiorite, diorite porphyrite, granite aplite of indo-china and Yan shan period. There are complex structure in mining area, the mainly fracture and compressive zone provide high-class ore-bearing zone and ore-fluid channel way. In this paper , based on the regional geologic background, the geologic characteristic of mining area, the genesis of the Hulugou gold deposit is analyzed and conclude that it is magmatic hydrothermal type.