Isotope Geochemistry of the Heihaibei Gold Deposit within the Kunlun River Area in the Eastern Kunlun Orogen in Northwest China and Its Metallogenic Implications

The Heihaibei gold deposit is located in the Eastern Kunlun Orogen Northwest China. mineralization here occurs predominantly quartz veins within faulted granite zones. sulfide mineral assemblage dominated by pyrite and arsenopyrite, with minor chalcopyrite, galena, sphalerite, tetrahedrite, micro-native gold. Weak alterations granites include silicification sericitization, chloritization carbonatization. measured δDH2O δ18Oquartz values of auriferous range from −104.2‰ to −81.1‰ +9.2‰ +13.9‰, respectively. δ34S sulfides +7.60‰ +8.65‰, lead isotope compositions ores 18.7219 19.0007 for 206Pb/204Pb, 15.6959 15.7062 207Pb/204Pb, 37.7359 38.8055 208Pb/204Pb. Pb potassic feldspars vary 18.3532 19.4864 15.6475 15.6812 37.1750 38.4598 Collectively, (H, O, S, Pb) geochemistry suggests that ore-forming fluid was a special metamorphic water evolved deep slab-derived fluids, sulfur were sourced such parts granites. Therefore, can be classified as an orogenic deposit, which closely associated subduction Paleo-Tethys oceanic plate, even final closure this ocean Later Triassic.