THE STABLE ISOTOPE GEOCHEMISTRY OF ARGON,HYDROGEN,OXYGEN AND ORE GENESIS OF SOME GOLD DEPOSITS IN THE JIAODONG REGION,SHANDONG PROVINCE

Based on the study of the geological characteristics, fluid inclusions and stable isotope compositions of hydrogen, oxygen and argon of the gold deposits in the Jiaodong region, it is suggested that the Majiayao gold deposit belongs to the hydrothermal one, formed from re-equilibrated magmatic water whereas the Jinqingding and shilipu gold deposits——hydrothermal deposits dominated by meteoric water.The δD and δ¹⁸O values of quartz in the Majiayao gold deposit are relatively high and stable with only a small variation;the δ¹⁸O values of the altered rocks increase gradually from wall rocks to ore veins. The δD and δ¹⁸O values of quartz in the Jinqingding and shilipu gold depesits are relatively lower with big variation;the δ¹⁸O values of altered rock decrease gradually from the surface down to the deep.