Abstract: The Yanlong bauxite deposit is a typical concealed deposit in western Henan Province. The authors analyze the phase relationship and element contents of the orebodies of bauxite, clay, laterite and siderite in vertical and profile with ore-bearing characteristics. The variation in elements in ore has a close relationship with lithofacies. The relation between minerals is characterized by lithofacies transition. Based on this understanding, the paper offers a reasonable resources estimation for the sedimentary minerals.