Stable isotope characteristics of Dianfang Au deposit in Songxian, Henan and its implication for deep mineralization tracing

Dianfang Au deposit is located in Songxian,Henan.The fact that δ34S value is 3.4～5.9 with low dispersion suggests the metallogenic material is a mixture of things coming from the mantle and the lower crust after a process of homogenization.The change of Pb isotope is relatively little;206Pb/204Pb is 16.9314～17.4121,207Pb/204Pb is 15.1607～15.1753,and 208Pb/204Pb is 37.3210～38.7644.The study on Pb isotope shows that metallogenic Pb comes from the mantle and lower crust.Combined with study on tectonic pathway and shape of ore bodies,it is predicted that concealed rock mass exists in deep part of southeastern periphery of explosive breccia in the mining area.Sulfur isotope in the area shows that δ34S galena inside the ore bodies,δ34S galena in sub-ore host rock,and δ34S supra-ore host rock have different characteristics.Tests on δ34S galena in drilling cores can provide evidences for deep prospection and exploration.