淄博盆地A层硬质黏土—铝土矿矿床地质特征及分布规律

Geological Characteristics and Distribution Regularity of A Layer Hard Clay—Bauxite Deposit in Zibo City

摘要:

山东淄博盆地A层硬质黏土—铝土矿主要赋存于二叠纪石盒子群万山组底部的A层含矿岩系中，矿体呈似层状和透镜状产出，A层硬质黏土在该区分布较广，而共生铝土矿矿体主要分布在东宝山—东冲山一带；两矿体的形态、结构、构造比较简单。两矿体垂向分布呈渐变关系,受沉积环境影响呈现不同的颜色和结构，肉眼可大致区分矿体与围岩，具体界线要靠化学分析结果予以区分；矿体厚度均匀，总体与Al2O3，SiO2含量呈正相关，与Fe2O3呈反相关；矿石中Al2O3，Fe2O3，SiO2的总含量一般在83.5%~85.5%，品位比较均匀，同时三者含量在不同矿石中有着相互消长的关系。

Abstract:

Hard clay and its symbiotic bauxite deposit in A layer in zibo city in Shandong province mainly occur in the orebearing rock system of the "A" layer at the bottom of Wanshan formation in Permian shibozi group. The ore bodies occur as stratoid and lenticular shape respectively. Hard clay in A layer is widely distributed in this area, while the symbiotic bauxite deposit are mainly distributed in DongbaoshanDongchongshan area. The form and structure of the two ore bodies are simple and the grade is even. The vertical distribution of the two ore bodies is in a gradual relation with different colors and structures under the influence of the sedimentary environment. The thickness of the ore body is uniform, which is positively correlated with the content of Al2O3 and SiO2, and negatively correlated with the content of Fe2O3. The total contents of Al2O3, Fe2O3 and SiO2 in the ore are generally between 83.5%~85.5%, and the contents of three minerals have a relationship of rise and fall in different ores.