安哥拉kitota锰矿区地质特征及矿床成因  

Geological Characteristics and Genesis of Kitota Manganese Deposit in Angola

作　　者：刘建 李鹏翔 包久荣 徐如磊 LIU Jian;LI Pengxiang;BAO Jiurong;XU Rulei(Tianjin North China General Institute of Geological Exploration,Hedong,Tianjin 300170)

机构地区：[1]天津华北地质勘查总院,天津300170

出　　处：《四川地质学报》2024年第3期444-448,共5页Acta Geologica Sichuan

摘　　要：安哥拉卢卡拉矿权区处于两个铁、锰成矿带上,其一是太古界和元古界古老地块内与硅铁建造有关的铁锰矿床成矿带,即卡辛佳-卢卡拉铁锰矿带;其二是古老地块西侧裂谷带中与基性-超基性岩有关的铁矿床,其代表为MBASSA矿床。位于其中的Kitota矿区的锰矿体主要赋存于元古界碎裂二长花岗岩、碎裂石英二长岩和构造角砾岩中,矿石类型多样。是在元古界裂陷小洋盆环境形成的矿胚基础上,经区域变质及构造作用,锰元素活化、迁移及析出后,在断裂带及两侧裂隙带内形成的充填型脉状工业矿体。The Lukala mineral right area in Angola is located in two iron and manganese metallogenic belt.The first is the iron-manganese metallogenic belt related to the formation of ferrosilicon in the ancient block of Archean and Proterozoic,namely the Khasingjia-Lukala iron-manganese belt.The second is the iron ore deposit related to basic-ultrabasic rocks in the rift zone on the west side of the ancient block,which is represented by MBASSA deposit.The manganese ore body located in Kitota mining area mainly occurs in Proterozoic cataclastic granite monzonite,cataclastic quartz monzonite and structural breccia,with various ore types.It is a filling vein industrial ore body formed in the fracture zone and the fracture zone on both sides after regional metamorphism and tectonic action,activation,migration and precipitation of manganese.

关 键 词：锰矿 接触交代型 卢卡拉 安哥拉 

分 类 号：P618.32[天文地球—矿床学]