Genesis of the Xinfang magmatic-hydrothermal gold deposit, Liaodong Peninsula, China: Constraints from pyrite Re-Os isotopes, C, O, S, Pb, Si, He and Ar isotopes

Genesis of the Jinying gold deposit, southern Jilin Province, NE China: Constraints from geochronology and isotope geochemistry

“…The δ 34 S values of pyrite at Jinying show a narrow range from + 0.1 ‰ to + 2.8‰ (mean = 1.6 ‰, n = 24), which are consistent with those from the typical magmatic-hydrothermal deposit worldwide (0 ± 3 ‰, Ohmoto & Rye 1979) and from magmatic-hydrothermal Au deposits in the Liaodong Peninsula (e.g. Wulong, Liu et al 2019, Zhang et al 2020; Xinfang, Zhang et al 2022a). These data indicate that the sulphur of the Jinying deposit was derived from a magmatic source.…”

“…The age interpreted for the Jinying deposit is similar to that of many other magmatic-hydrothermal ore deposits in eastern Liaoning and southern Jilin. These include the Wulong Au deposit (119 Ma, Zhang et al 2020), Xinfang Au deposit (121 Ma, Zhang et al 2022a), Changfagou Cu (Au) deposit (116 Ma; Zhang et al 2017) and Tianhexing Cu (Mo) deposit (115 Ma; Zhang et al 2015). The Jinying Au deposit is thus representative of an important Early Cretaceous gold mineralization event in southern Jilin Province.…”

“…Likewise, the 3 He/ 4 He and 40 Ar/ 36 Ar values of pyrite from Wulong range from 0.15–0.54 R/Ra and 297–315 (Zhang et al 2020). For the Xinfang gold deposit, the 3 He/ 4 He and 40 Ar/ 36 Ar values of pyrite range from 0.14–0.62 R/Ra and 1008–7100 (Zhang et al 2022a). Moreover, the proportion of mantle 4 He is calculated as He mantle (%) = (R sample -R crust )/(R mantle -R crust ) × 100%, where R mantle = 8, R crust = 0.01 and R represents the 3 He/ 4 He ratios of the fluids in the mantle, crust, and sample (Tolstikhin, 1978; Kendrick et al 2001).…”

The genesis of Xindian gold deposit, Liaodong Peninsula, NE China: Constraints from zircon U–Pb ages, S–Pb isotopes, and pyrite trace element chemistry

“…The U–Pb zircon age data illustrates that the granodiorite porphyry dike was emplaced at 127.2 ± 1.3 Ma and the diorite porphyry dike at 120.9 ± 1.6 Ma (Figure 7), thus bracketing the possible time for gold mineralization. This time window overlaps with the ages obtained for the Wulong (~127 Ma; Yu et al, 2020), Baiyun (~126 Ma; Sun et al, 2019), and Xinfang gold deposits (~121 Ma; Zhang et al, 2022) in the Liaodong Peninsula. These examples of Early Cretaceous gold mineralization are part of a widespread gold mineralization event extending along the Jiaodong (e.g., Deng et al, 2020; Yang & Zhou, 2001) and Liaodong peninsulas.…”