The evaluation of gold potentiality in the Taihua Group, Xiong'er Groupand Yanshanian granites shows that most Au appear to came from the TaihuaGroup which is the dominant ore source bed. Research on sulfur, lead, hydrogen,oxygen and carbon isotopes indicates that the ore substances such as S, Pb and Cwere from the Taihua Group and that ore fluids consist mainly of meteoric waterand partly of magmatic water. On the basis of the above-mentioned features andLate Arthean-Proterozoic regional metamorphism, Yanshanian tectono-magmaticthermal event and metallogenic epoch, the authors propose that the altered faultrock type gold deposits belong to a complex reworked type deposit. Protores mighthave first formed during the regional matemorphic process, and then gold wasprobally remobilized by Yanshanian circulating meteoric water and parts ofmagmatic water, and at last precipitated in crushed fault zones, thus forming thealtered fault rock type gold deposits.