几内亚博凯红土型铝土矿赋存特征及开采技术条件  

Occurrence characteristics and mining technical conditions of Bokélateritic bauxite in Guinea

作　　者：卢俞杰 吴迪 高旭升 刘君宇 李硕 王滑冰 LU Yujie;WU Di;GAO Xusheng;LIU Junyu;LI Shuo;WANG Huabing(Henan No.2 Institute of Geological and Mineral Resources Survey Co.,Ltd,Zhengzhou 450001,Henan,China)

机构地区：[1]河南省第二地质矿产调查院有限公司,河南郑州450001

出　　处：《矿产勘查》2024年第2期252-263,共12页Mineral Exploration

基　　金：河南国际矿业开发有限公司博凯铝土矿生产勘探和河南省豫地科技集团有限公司2023年度科技项目(豫地集团[2023]60号-5)资助。

摘　　要：博凯铝土矿床位于几内亚铝土矿矿集区——博韦盆地的西南部,属典型的红土型铝土矿矿床。为了使矿区勘查和开发工作更为经济、高效,本文详细研究了区内铝土矿床的赋矿岩系和矿体地质特征、矿床成因及开采技术条件。研究认为,该区赋矿岩系自上而下可划分为铁铝富集带、风化淋滤带和成矿母岩带,且成矿母岩为玄武岩和辉长岩。矿体空间形态多呈层状、似层状和透镜体状,平面形态呈不规则状、港湾状、锯齿状、短轴状、弧形状、带状等,其产状随地形起伏而变化。矿体中Al_(2)O_(3)含量变化均匀,与SiO2含量呈弱负相关、与铝硅比(A/S)呈弱正相关,但Al_(2)O_(3)含量与Fe_(2)O_(3)含量呈明显的相互消长关系。矿区水文地质、工程地质和环境地质条件简单,适宜露天开采。Bokébauxite deposit is a typical lateritic bauxite deposit located in the southwest of BovéBasin,a bauxite concentration area of Guinea.In order to make the exploration and development more economical and efficient,this paper studies the geological characteristics of the host rock series and ore body,ore genesis and the mining technical conditions of the deposit in detail.The results show that the host rock series in this area can be divided from top to bottom into iron and aluminum enrichment zones,weathered leaching zones and ore-forming mother rock zones,and the metallogenic mother rock are basalt and gabbro.The spatial form of the ore body is mostly stratiform, likely stratiform and lenticular. In contrast,the plane form is irregular, harbor, zigzag, shortaxis, arc and ribbon, etc. , and its occurrence changes with the topography. The content of Al_(2)O_(3) in the ore bodychanges uniformly,and has a weak negative correlation with the content of SiO2 and a positive correlation with theratio of Al to Si. However,the content of Al_(2)O_(3) and Fe_(2)O_(3) have an obvious mutual fluctuation relationship. Thehydrogeology,engineering geology,and environmental geology of the mining area are simple and suitable for openpitmining.

关 键 词：红土型铝土矿 赋存特征 开采技术条件 博凯 几内亚 

分 类 号：P611[天文地球—矿床学] P618.45[天文地球—地质学] P641.4P642.5