Abstract: Qinglonggou Gold Deposit is a significant gold deposit in Tanjianshan Goldfield， northern margin of Qaidam. The orebodies are mainly hosted in Mesoproterozoic carbon-bearing dolomitic marble of the Wandonggou Group， with some found in intrusive diorite porphyrite. However， the diorite porphyrite's chronology， source， origin of gold-bearing materials， and gold content variation have not been adequately addressed， limiting the understanding of mineralization and the potential for further exploration. Zircon U-Pb geochronology and in-situ sulfur isotopes and trace elements in pyrite from gold-bearing diorite porphyrite were analyzed using LA-ICP-MS. The findings reveal that the diorite porphyrite formed in the Early Permian (293.0 Ma±1.8 Ma)， with zircon ε_Hf(t) values ranging from -3.5 to 4.8 and a two-stage model age (T_DM2) between 912 and 1375 Ma， indicating material from the Mesoproterozoic middle-lower crust with mantle contributions. Pyrite in the diorite porphyrite exhibits low δ³⁴S values， low Au content， high As content， and elevated w(Co)/w(Ni) ratios (δ³⁴S＝4.01 ‰ -4.58 ‰； w(Au)＝0.10×10^-6-0.49×10^-6， averaging 0.26×10^-6； w(As)＝404.61×10^-6-9546.27×10^-6， averaging 5779.62×10^-6； w(Co)/w(Ni)＝3.86-97.37)， differing significantly from the δ³⁴S， Au content， As content， and w(Co)/w(Ni) values of pyrite in the carbon-bearing dolomitic marble host rock (δ³⁴S＝8.4 ‰ -15.8 ‰， w(Au)＝1.92×10^-6-30.28×10^-6， w(As)＝9029.20×10^-6-130727.48×10^-6， w(Co)/w(Ni)＝0.11-0.38). This suggests that gold mineralization likely originated from deep-seated Early Permian magma or mantle degassing. The low gold content in pyrite suggests a limited contribution to mineralization， with exploration efforts focusing primarily on gold bodies within carbon-bearing dolomitic marble， followed by magmatic rocks.