Figure 4.
Halogen values and He-Ar isotopic compositions of fluid inclusions from gold-related quartz and pyrite of the Daping gold deposit. (a) I/Cl vs. Br/Cl plot for quartz. (b) 40Ar*/4He vs. 3He/4He plot for pyrite. (c) 3He/36Ar vs. 40Ar/36Ar plot for pyrite. (d) 40Ar/36Ar vs. 3He/4He plot for pyrite and binary mixing modeling for the fluid source. M equals mantle components. The mantle, crust, ancient granitic basement, air, amphibole and sedimentary pore water reference values are from ref. [58] and references therein. The reference values of sediments are from refs [112,113], of mantle halogen ratios from ref. [114], and of seawater from ref. [115] and references therein. The SCLM 40Ar/3He reference values are from ref. [54]. Abbreviations: Py = pyrite, Py-di = pyrite in diorite, Py-di = pyrite in dolomite, Q-di = ore quartz hosted in diorite, Q-do = ore quartz hosted in dolomite, SCLM = subcontinental lithospheric mantle, SET = seawater trajectories.