铜陵凤凰山铜矿区角砾岩特征及其成因分析  

THE CHARACTERISTICS OF BRECCIAS AND ANALYSISOF ORIGIN NEAR ORE BODIES IN FENGHUANGSHAN COPPER DEPOSITS,TONGLING

作　　者：毛政利[1] 杨斌[1] 赖健清[1] 

机构地区：[1]中南大学地学与环境工程学院,湖南长沙410083

出　　处：《矿物岩石》2004年第1期29-32,共4页Mineralogy and Petrology

基　　金：国家"十五"科技攻关项目(编号:2001BA609A 06)

摘　　要：　凤凰山铜矿区矿体附近不同类型角砾岩的分形统计分析结果表明,其中角砾状花岗闪长岩的形成以化学作用为主,其颗粒大小分布的分维值达到了1.389,说明其在形成过程中经历了机械破裂过程,其破裂过程中的能量达到中等。角砾状矿石和角砾状大理岩均为水力致裂角砾岩,角砾状矿石的颗粒大小分布的分维值(1.526)大于角砾状大理岩(1.24),指示了角砾状矿石形成时的能量大于角砾状大理岩。The fractal statistical analysis of various type of breccias in ore bodies in Fenghuangshan copper deposits indicated that, among them, the brecciated granodiorite was formed mainly by chemical attack. Its fractal dimension of particle size distribution (Ds) is 1.389,demonstrating that it had gone through the process of mechanical comminution during its formation with moderate energy.On the other hand, brecciated ore and brecciated marble are all hydraulic breccias. Moreover, the fractal dimension of particle size distribution (Ds) of brecciated ore (1.526) is higher than that of breciated marble′s (1.24),showing that the formation energy of brecciated ore is higher than that of brecciated marble.

关 键 词：角砾岩 成因分析 分形统计 凤凰山 铜矿 

分 类 号：P618.41[天文地球—矿床学] P588[天文地球—地质学]