Abstract: This paper conducts a systematic study of the interlayer oxidation ore around the Aotoushanfault in the Wanzijie mining section of the Laochang ore field in Gejiu City, Yunnan Province. We stud-ied the mineral relations, analyzed the geological characteristics of typical ore bodies in the area, dis-cussed the rules of mine ralization, summarized the “I-shaped",“ trapezoidal”and other ore-controlling patterns , carried out mineralization predictions , and delineated the target areas for mineralization. It aimsto provide reference for geological research and prospecting work of mineral areas.

Key words: Wanzijie ore section;mineralization of oxidation ore, geological characteristics of ore deposits;ore-controlling rules