Abstract: Henan Province is rich in refractory clay mineral resources,and its reserves rank second in China.Refractory clay has a complete variety and good economic value.It is one of the superior minerals in Henan Province.The refractory clay deposit in Mianchi County, Henan Province,is located 10 km north of Mi⁃ anchi County,and is located in the southern margin of North China landmass in tectonic position.By summarizing the ore-forming geological characteristics,the genesis and prospecting direction of the deposit are ana⁃ lyzed.The study results show that:①The deposit occurs in the Upper Carboniferous Benxi Formation of iron and aluminum mudstone formation,belongs to sedimentary deposit type.②The ore minerals are mainly kaolinite and diaspore, and a small amount of pyrite and other minerals.The refractoriness is generally greater than 1 760 ℃.③The orebody is lens-shaped,and its occurrence,shape and distribution are controlled by the geomorphology of the sedimentary disjoint surface.It often coexists with bauxite and distributes in the upper part of bauxite.The zone with karst funnel development is conducive to the formation of high-quality clay ore.

Key words: refractory clay depsoti,geological characteristics,deposit genesis,prospecting direction