The Liaoshang gold deposit is a newly discovered superlarge gold deposit on the northeast margin of Jiaolai Basin, which is different from "Jiaojia-type" and "Linglong-type" gold deposits by unique gold bearing minerals of pyrite and dolomite. The isotopic analysis of C, O for Au-bearing dolomite and S, Pb for Au-bearing pyrite from this deposit was carried out in order to identify the source of ore-forming materials and fluids for this new type gold deposit. The results show that the δ¹³C_V-PDB and the δ¹⁸O_V-SMOW values of dolomite range from -4.60‰ to -3.60‰ and 9.6‰ to 10.6‰, respectively. The δ³⁴S values of Au-bearing pyrite vary from +7.2‰ to +9.4‰ with an average of +8.2‰. The results of Pb isotope from Au-bearing pyrite vary from 17.027 to 17.576, 15.435 to 15.503, and 37.706 to 38.205 for ²⁰⁶Pb/²⁰⁴Pb, ²⁰⁷Pb/²⁰⁴Pb and ²⁰⁸Pb/²⁰⁴Pb ratios, respectively. Combined with the tectono-magmatic evolution in the Jiaolai Basin, the authors hold that the ore-bearing C-H-O fluids of the Liaoshang gold deposit mainly originated from the mantle. Furthermore, the meteoric water and crustal ore-forming materials were involved during the ascending process of ore-forming fluids, resulting in the characteristics of crust-mantle mixing. In conclusion, the genetic type of Liaoshang gold deposit should be the pyrite-carbonate vein type low temperature hydrothermal gold deposit.