Structure–Fluid–Mineralization System of Jiadi Gold Deposit in Southwestern Guizhou, China

The Jiadi gold deposit, situated in the Southwestern region of Guizhou, is a large-scale, recently discovered, basalt-hosted, and fine-grained disseminated deposit. This study has unveiled that tectonic deformation deposit can be categorized into four stages: Late Paleozoic crustal uplift brittle (D1-deformation) stage; Early Yanshanian NW-trending compressive ductile (D2-deformation) NS-trending strike-slip fault (D3-deformation) Himalayan EW-trending nappe structure (D4-deformation) stage. outcomes C-O isotope analysis revealed fluid responsible for ore formation exhibits attributes magmatic water blended with meteoric water, metallogenic constituents primarily originate from deep source. occurred during D2-deformation stage extended to D3-deformation induced hydrothermal activity rock devolatilization, leading generation CO2-rich low-salinity fluids. stage, which intimately associated mineralization, classified three pyrite smoky quartz sulfide findings obtained laser Raman spectroscopy indicate inclusions typically comprise CO2, CH4, N2, SO2. These fluids ascended along interlayer fracture zone alteration geochemical environment was accompanied by immiscibility or boiling, resulting rapid precipitation materials.