河南铝土矿含矿岩系基本地质特征研究

Study on the basic geological characteristics of the ore-hosted strata of Henan bauxite deposit

河南省铝土矿床以沉积型铝土矿为主,是我国最主要的铝土矿产地之一,也是我国铝工业最重要的矿石原料来源地。河南铝土矿含矿岩系即上石炭统本溪组,为一套厚度不大的含铁富铝的黏土—铝土岩组合,主要分布于华北地层区的山西分区、豫西分区、华北平原分区内古隆起构造的周围,岩性组合自下而上由古风化壳、铁质黏土岩层、铝土矿层、硬质黏土矿层、黏土质页岩段等5个部分组成。资料表明,该含矿系地质时代属晚石炭世,形成于滨海湖坪与海湾、潟湖的沉积环境。

The bauxite deposits in Henan Province mainly are sedimentary type deposits. Henan Province is one of the key bauxite producers and the main provider of the raw bauxite ore for the China＇ s aluminum industry. The ore - hosted strata of Henan bauxite deposits are the Upper Carboniferous Benxi formation, which is a thin thickness of iron - containing and aluminum - rich clay - bauxite combination, and mainly are distributed in Shanxi block area, western Henan block area and the surrounding areas of the palaeo - up- lifts in North China Plain area within the North China stratigraphic area. The lithological combination consists of the palaeo weathered crust, iron - bearing clay layer, bauxite layer, hard clay layer and clay - bearing shale layer. The study indieates that the ore - hosted strata formed in the depositional environments of coastal lake, sea bay and lagoon of Late Carboniferous, formed.