地质与资源2023，Vol.32Issue(6)：699-704,6.DOI:10.13686/j.cnki.dzyzy.2023.06.006
河南省巩义铝土矿地球化学特征分析
GEOCHEMICAL CHARACTERISTICS OF THE GONGYI BAUXITE DEPOSIT IN HENAN PROVINCE
摘要
Abstract
Longmen-Gongyi area is one of the bauxite metallogenic belts in Henan Province.Based on chemical test of the main compositions of Gongyi bauxite deposit,the paper analyzes the change rule of elements in the bauxite deposit.The results show that the major mineral compositions of bauxite ore is diaspore(45％-95％),followed by kaolinite and illite(4％-25％),with a small amount of siderite,pyrite,calcite and dolomite,and trace minerals such as zircon and apatite.The main chemical compositions of bauxite ore are Al2O3,SiO2,Fe2O3,TiO2 and S,accounting for 83.42％of the total,among which the Al2O3 content is 40.46％-77.59％,averagely 60.68％,SiO2 1.00％-29.54％,averagely 14.07％,with the aluminum-silicon ratio(A/S)of 1.8-65.1,averagely 4.3.Under different burial depth conditions,the larger the relative depth is,the larger the Al2O3 content and A/S ratio are.The chemical index of alteration(CIA)of the area is up to 91.16,indicating that the aluminum-bearing rock series in the area has undergone intense chemical weathering.关键词
铝土矿/化学风化指数/一水硬铝石/铝硅比值/河南省Key words
bauxite/chemical weathering index/diaspore/A/S ratio/Henan Province分类
天文与地球科学引用本文复制引用
杨武,梁小山,胡盛,杨持恒..河南省巩义铝土矿地球化学特征分析[J].地质与资源,2023,32(6):699-704,6.基金项目
河南省财政地质勘查续作项目"河南省巩义市涉村铝(黏)土矿中深部普查"(豫国土资发[2018]22号-2). （黏）
