四川壤塘县扎阔金矿床地质特征及矿床成因  

Geological characteristics and metallogeny of Zhakuo gold deposit in Sichuan

作　　者：夏国清[1] 朱迎堂[2] 黄华谷[3] 孙攀[4] 

机构地区：[1]成都理工大学沉积地质研究院 [2]成都理工大学"地球探测与信息技术"教育部重点实验室 [3]中国科学院广州地球化学研究所边缘海地质重点实验室 [4]四川省核工业地质调查院

出　　处：《黄金》2009年第5期17-19,共3页Gold

基　　金：四川省财政专项补助项目(KC200711-2)

摘　　要：扎阔金矿床产于燕山期中酸性侵入体外接触带——晚三叠世侏倭组碎屑岩中,赋存于NE向韧脆性断裂构造带内,矿体呈脉状。从矿床地质特征、成矿地质条件和矿床地球化学等方面对该矿床进行了分析,指出晚三叠世侏倭组碎屑岩地层为金矿之矿源层,燕山期中酸性侵入体岩浆作用为金矿的形成提供热源,构造作用对含金热液的流动与迁移提供通道。金矿化与硅化、黄铁矿化、褐铁矿化关系密切。其矿床成因为热液—构造蚀变岩型金矿床。Zhakuo gold deposit locates in NE ductile-brittle fracture tectonic zone of the clastie rocks of the Zhuwo Formation of late Triassic and the Yanshanian period acidic-intermediate instrusive rock. The mineralization bodies present as vein type. The paper analyzes the deposit in the aspects of geological features, ore-controlling conditions as well as geochemistry. It is put forward that the clastic rocks of Zhuwo Formation of late Triassic are the source of gold mineralization zone and the Yanshanian invasion is the hot source of gold mineralization. The tectonic function provides the route for gold-bearing thermal flow and transformation. The most important wall rock alterations are silicification, pyritization and ferritization which are closely associated with gold mineralization. The origin of this gold deposit is teetonic alteration type.

关 键 词：地质特征 矿床成因 托阔金矿 四川壤塘 

分 类 号：P618.51[天文地球—矿床学]