河南省渑池县关底沃-扣门山铝土矿床地质特征及矿床成因分析

Geological characteristics and genetic analysis of Gudiwo-Koumenshan bauxite deposit in Mianchi County,Henan Province

河南省中西部地区蕴藏着丰富的煤、铝资源,此次研究对象为河南省渑池县关底沃-扣门山铝土矿床,系统阐述了该地区的地质背景、矿床特征,综合地质矿床特征,分析矿床成因及找矿标志。通过地质勘查工作,矿区发现并控制铝土矿矿体6个,分布于石炭系本溪组铁铝质岩系中,受地层控制。矿石化学分析,认为古陆铝硅酸盐岩及基底碳酸盐岩是铝土矿的重要物质来源,矿石中Al_(2)O_(3)与SiO_(2)、Fe_(2)O_(3)、S含量总体上呈负相关性,与铝硅比(A/S)呈正相关关系,本溪组底部紫红色铁质黏土岩,是重要找矿标志,上石炭统太原组含生物碎屑灰岩,是寻找隐伏铝土矿的重要标志。

The central and western regions of Henan Province are rich in coal and aluminum resources.The object of this study is the Guandiwo Gumenshan bauxite deposit in Mianchi County,Henan Province.The geological background,characteristics of the deposit,comprehensive characteristics of the geological deposit,and analysis of the genesis and prospecting indicators of the deposit are systematically described.Through geological exploration,6 bauxite ore bodies are found and controlled in the mining area,which are distributed in the Carboniferous Benxi Formation ferroaluminous rock series and controlled by the stratum.According to the ore chemical analysis,it is believed that the ancient land aluminosilicate rock and the basement carbonate rock are the important material sources of bauxite.In the ore,Al_(2)O_(3)is negatively correlated with SiO_(2),Fe_(2)O_(3),and S content in general,and positively correlated with the aluminum silicon ratio(A/S).The purplish red ferritic clay rock at the bottom of Benxi Formation is an important prospecting indicator.The Upper Carboniferous Taiyuan Formation contains bioclastic limestone,which is an important indicator for finding concealed bauxite.