Genesis of the Dongpuzi Gold Deposit in the Liaodong Peninsula, NE China: Constraints from Geology, Fluid Inclusion, and C–H–O–S–Pb Isotopes

The Dongpuzi deposit is an epithermal gold located in the southern margin of Shaozihe volcanic fault basin Liaodong Peninsula. On basis fluid inclusion and C–H–O–S–Pb isotope data, a metallogenic model established for deposit. mineralization at has experienced quartz–pyrite (I), quartz–sulfide (II), quartz–calcite (III) stages. quartz from ore stage II liquid-dominated aqueous inclusions, which have homogenization temperatures ranging 113 to 162 °C salinities varying 3.2 9.6 wt% NaCl equiv. decreasing (106~143 °C) (2.7~6.9 equiv.). data indicate that ores were precipitated low-temperature low-salinity solutions, with obvious decrease temperature salinity stages III. calculated δ18Owater values range −14.71‰ −13.31‰, corresponding δDwater −103.3‰ −96.1‰, indicating ore-forming fluids could be meteoric origin. calcite III δ13CV-PDB −4.5‰ −4.2‰ δ18OV-SMOW +7.0‰ +7.4‰, mantle source carbon. pyrite yielded δ34S +4.1‰ +6.6‰ Pb isotopes consistent those host trachyte porphyry rocks Xiaoling Formation, suggests S dominantly derived some combination Paleoproterozoic metamorphic Gaixian Formation. These results, together geology, typical low-sulfidation important materials input porphyry, was formed under extensional setting related Early Cretaceous lithospheric extension thinning eastern North China Craton.