4a, b, c and e), showing an alteration zone, from the proximal mines with silicification, pyritization and adularization to the distal mines with sericitization, illitization and propylitization.
The gangue minerals are quartz, rhodochrosite, fluorite, calcite, and dolomite, which are not accordant with the typical characteristics of alternation in epithermal deposits (e.g., adularization or alunitization [24, 76, 77]), which can further rule out the possibility that the Zhijiadi deposit is a kind of epithermal deposit.