河南方山铝土矿床地质特征及深部找矿前景  

Geological characteristics of Fangshan bauxite deposit and prospecting potential in the depth,Henan

作　　者：印修章[1] 马红义[1] 董永志[1] 罗明伟[2] 杜春阳[2] 

机构地区：[1]河南省地质矿产勘查开发局第二地质环境调查院,郑州450053 [2]河南省地质矿产勘查开发局第二地质勘查院,许昌461000

出　　处：《矿产勘查》2015年第3期238-244,共7页Mineral Exploration

基　　金：河南省禹州煤田煤下铝(黏)土矿预查项目(编号:豫财建[2010]506)资助

摘　　要：河南方山铝土矿区位于嵩箕台隆东南缘白沙—许昌复向斜西段,其中漏斗状矿体最大厚度59.25 m。矿床形成于石炭系上统本溪组特定的含铝岩系中,为一套沉积在寒武系—奥陶系灰岩的顶面上的滨海湖泊相的铁、铝、硅沉积建造。矿体呈似层状和透镜状断续产出,Al2O3含量在垂向上自深部到浅部逐渐降低,在水平方向上自西向东由露天到深部逐渐降低。矿石结构主要为显微粒状结构,矿石构造主要为砾状构造、豆鲕状构造。矿床属海侵前滨海(岸)湖泊相沉积叠加岩溶堆积的一水硬铝石型铝土矿床。The Fangshan bauxite deposit is located in the western part of Baisha- Xuehang synclinorium within the southeastern margin of Songqi platform swell. The funnel - shaped orebody has maximum thickness of 25 - 59 m. The deposit was formed in the specific aluminiferous rock system of Upper Carboniferous Benxi group which is an iron, aluminum, and silicon sedimentary formation deposited on the top of the littoral lacustrine facies of Cambrian - Ordovician limestone. Ore bodies have bedded and lenticular intermittent forms, the A12 03 content in vertical direction gradually reduced from the depth to shallow part, and in the horizontal direction from west to east gradually reduced from the surface to the depth. The ore texture is mainly micro - granular texture and the ore structures are mainly conglomeratic and oolitic structures. The ore deposit belongs to the diasporic bauxite of the coastal transgression foreshore littoral lacustrine facies deposits superimposed by the karst lake facies deposit.

关 键 词：铝土矿床 地质特征 找矿前景 方山矿区 河南 

分 类 号：P618.45[天文地球—矿床学]