Origin of gold in the formation of Shihu Gold deposit, Hebei province, China

The geochemical feature of the trace element and the rare earth element in the wall rock indicate Au is derived from regional stratigraphy in Shihu Gold deposit, Hebei province, China. The data of S, Pb and C isotopes show that they were derived from the mantle, the data of the compositions of gas and liquid phases in quartz inclusion and H, O isotopes suggest that fluids flow is a mixture of magmatic hydrothermal fluids and atmosphere precipitation. The physical chemical condition of lgfo2:39.95, Eh: - 0.42 to - 0.64V and pH: 5.94 to 6.44 suggest that the deposit emplaced in a near-surface, relative oxidized and weakly alkaline geological setting. Measure of components, decrepitation temperature and the vertical isothermal diagram of quartz inclusions at different levels in orebody 101-4 suggest that fluids flow are K+- Na+- Ca2+- SO4\ud 2- - NO3 - - Cl-system rich in organic volatiles such as CO2, H2O and CH4 and C2H6, and moved from south to north and from deep to shallow. Shihu gold deposit is a polygenetic compound ore deposit formed in the Archean mesometamorphic rock and remobilized by mixed hydrothermal fluid controlled by fracture zone