Abstract: Qinglonggou Gold Deposit is a significant gold deposit in Tanjianshan Goldfield,northern margin of Qaidam.The ore bodies 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 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 εHf(t) values ranging from -3.5 to 4.8 and a two-stage model age (TDM2) between 912 and 1 375 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)=404.61×10-6-9 546.27×10-6，averaging 5 779.62×10-6；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)=9 029.20×10-6-130 727.48×10-6,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.