招平断裂带上盘金矿床氢氧同位素地质特征

H-O Isotopes of Gold Deposits in the Hanging Wall of Zhao-Ping Fault Belt

招平断裂是胶东招掖金矿带的主要控矿断裂,其上盘金矿床受NE向断裂构造控制,赋矿围岩为胶东群变质岩,金矿化以含金硫化物石英脉为主。研究表明,该区域金矿床H-O同位素组成为:δDH2O值为-100.15‰～-73.13‰,平均为-86.63‰;δ18OH2O值为4.78‰～10.12‰,平均为6.22‰,与下盘金矿床H-O同位素组成相同。显示出该地区成矿热液均以幔源为主,具有与招掖金矿带其它金矿类似的成矿热液系统。

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 δ^18O value of the quartz vein ranges from 4.78‰ to 10.12%0,and the average value is 6.22‰. The （δDH2O 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 area. mainly mantle derived, similar to the ore fluids in other deposits in the area.