The Shuangpengxi gold deposit, as one of the most important gold deposits in northwest China, is located in the Tongren ore concentration area of Qinghai Province. Gold mineralization occurs within skarn that lies between granodiorite and marble. Studies show that ores and granodiorite have similar chondrite-normalized REE patterns and are enriched in light REE with a moderate Eu negative anomaly but no Ce anomaly. According to the isotopic data, it is considered that the ore-forming materials were derived from the crust and the upper mantle. Studies show that the Shuangpengxi ore deposit might be a skarn gold deposit related to hypo-and mesothermal processes and belongs to the acid and intermediate-acid magmatic activities of Indo-Chinese and Yanshanian period.