Abstract: Abstract: Zhao-Ping fault belt is the most important orecontrolling structure in Zhao-Ye gold belt in Jiaodong. The gold deposits that are located in the hanging wall of the Zhao-Ping fault belt are distributed mainly in the metamorphic rocks of Jiaodong Group. The ores are mainly of the auriferous quartz vein type hosted in NE trending fractures and faults. Wall-rock alterations are most potassic alteration, silicification, quartz-sericitization, pyritization and carbonatization. The δ¹⁸O value of the quartz vein ranges from 4.78‰ to 10.12‰,and the average value is 6.22‰.The δD_H2O values of inclusion fluid vary from -100.15‰ to -73.13‰, and the average value is -86.63‰. The result shows that the ore hydrothermal fluid is mainly mantle derived, similar to the ore fluids in other deposits in the area.

Key words: Zhao-Ping fault belt, H-O isotopes, ore-bearing hydrothermal fluid, mantle derived fluid