桂北地区剪切带型金矿成矿机理研究  

Mineralization Mechanism Research of Shear Zone Gold Deposits in Northern Guangxi Province

作　　者：莫江平[1] 黄杰[1] 冯国玉[1] 

机构地区：[1]桂林矿产地质研究院,桂林541004

出　　处：《地质与勘探》2009年第6期655-660,共6页Geology and Exploration

基　　金："十一五"国家科技支撑计划(编号:2006BAB01B04);广西科学基金(编号:桂科基0575105)资助

摘　　要：桂北地区金矿划分为石英脉型、石英细脉带型和构造蚀变岩型金矿。不同级别剪切带构造控制矿化集中区、矿床、矿体分布以及矿脉形态、产状和矿化类型,具有上部石英脉型、中部石英细脉带型、下部构造蚀变岩型金矿的矿化分带模式。金质矿源主要来源于上地壳围岩,硫源主要来自深部,金矿成矿溶液主要来源于大气降水,热源来自变质和构造运动,成矿时代主要为燕山期。矿床成因属是产于前寒武纪浅变质碎屑岩系的与脆-韧性剪切带有关的中低温热液脉状金矿。The gold deposits in north Guangxi area can be divided into the quartz vein, the quartz stringer vein belt and the structure alteration crag gold deposits. The different ranks of shear-structure zone control central mineralization, the ore deposit, the ore body distribution as well as the ore lode shape, producing the mineralization type of quartz veins upside, the quartz slight vein belt in the middle, the structurally altered mineralization at the bot- tom. The gold is mainly from earth＇s crust, and the sulfur from the deep level. The mineralization related fluids mainly come from atmospheric water, and the heat comes from the metamorphism and the tectonic events. The mineralization mainly occurred at the Yanshan cycle. According to the research, the deposit belongs to epithermal gold deposits related to crisp - ductile shear zone frothed in pre-Cambrian low metamorphic clastic rocks.

关 键 词：金矿 成矿机理 剪切带 矿床成因桂北 

分 类 号：P618.44[天文地球—矿床学]