Abstract: With the mining of Qiadong copper mine in Tongren County, inghai Province, there hasbeen no comprehensive study on its deposit geology, and no systematic summary on its genesis and pros.pecting indicators. Based on the previous geological work and the results of field geological investigationin the mining area, this paper concludes that the copper mine in Oiadong, Tongren County, QinghaiProvince , is mainly located in the formation of the lower Triassic system in the upper part of the Longwuhe River. The formation of the deposit is closely related to magmatism and volcanism. It can be conclu.ded that the genesis of Oiadong copper mine in Tongren County, Qinghai Province is a volcanic eruptionsedimentary deposit. The strata in the upper lithologic section of Longwuhe River formation, malachitemineralization and skarnization are important prospecting indicators. So it provides an important referencefor the future production and prospecting of the mine.

Key words:  stratigraphic control, sendimentary deposit of volcanic eruption, Tongren county in OinghaiProvince