Mixing in Two Types of Fluids Responsible for Some Carbonate-Hosted Pb–Zn Deposits, SW China: Insights from the Maoping Deposit

Carbonate-hosted Pb–Zn deposits are of major economic importance. The Sichuan–Yunnan–Guizhou metallogenetic belt (SYGMB), located on the western margin Yangtze Block, comprises over 400 carbonated-hosted deposits. However, ore-forming fluids recorded in these have led to controversy regarding ore genesis. We investigated a fluid system for Maoping deposit SYGMB, based inclusions, and H–O–He–Ar isotopic studies. results showed that characterized by mixing high-temperature low-salinity metamorphic low-temperature high-salinity basinal brines. Precambrian basement is considered produce fluids, while brines said originate from Youjiang Basin. mineralization at depositional site appears reflect coincidence brines, Carboniferous coal seams, structural-stratigraphic traps. Regional-scale data show large-scale heterogeneity properties, including organic fluids. Furthermore, suggest precipitation model some high-grade SYGMB. These findings will contribute an understanding types