山东省淄博A层硬质粘土矿主要赋存于中二叠统石盒子组,不仅蕴藏量多,而且顶板有相当数量的A层鲕粒状含铁铝土矿,勘查开发潜力大,前景广阔,通过对该区硬质粘土矿含矿岩系特征、矿体特征等分析研究及矿床成因分析,最终提出找矿标志:即主要为中二叠统石盒子组含矿岩系,一般在顶板为长石石英砂岩为鲕粒状结构A层铝土矿,在A层铝土矿的下面就是青灰色A层硬质粘土矿,底板一般为紫红色砂质页岩或者是长石石英砂岩。 A layer of hard clay in Zibo, Shandong Province mainly occurs in the Middle Permian Shihezi Formation, which not only contains a large amount of ore, but also has a considerable amount of A-layer oolitic iron-bearing bauxite on the roof, which has great exploration potential and promising prospects. Through the analysis of ore-bearing rock series characteristics and orebody characteristics of ore-bearing rocks in this area, and the analysis of the genesis of the ore deposit, the prospecting indicator is finally proposed: the ore-bearing rock series of the Middle Permian Shihezi Formation is generally dominated by The feldspar quartz sandstone is an o-bitumen A-layer bauxite. Below the A-layer bauxite there is a bluish-grained layer A of hard clay. The mat is typically purplish-brown shale or feldspar quartz sandstone.