The Axi andthe Tawuerbieke gold deposits, located in the Tulasu basin, Western Tianshan, Xinjiang, are adjacent to each other but show different styles of mineralization, representing the low- sulfidation epithermal, and transition between porphyry- and epithermal- type mineralization, respectively. The petrography and SEM- spectrum analysis show that the metal minerals in ores from the Axi are mainly pyrite, arsenopyrite and marcacite, whereas chalcopyrite, bornite, tetrahedrite, tennantite and aarite were commonly developed at the Tawuerbieke in addition to pyrite. The fluid inclusions in both the deposits are aqueous inclusions with low temperature and salinity. The thermoelectric conduction type of pyrite from the Axi is characterized by P type, and the calculated temperatures vary from 160 ℃ to 240 ℃ (average 195 ℃). In contrast, the thermoelectric conduction type of pyrite from the Tawuerbieke is dominated by N- P mixed type, and the corresponding temperatures of N and P type pyrite are between 300 ℃ and 380 ℃ (average 362 ℃), and between 80 and 240 ℃ (average 137. 0 ℃), respectively. Based on the mineral assemblages, ore textures, fluid inclusions and thermoelectric characteristics of pyrite, it is inferred that the ore- forming temperature of the Tawuerbieke is significantly higher than that of the Axi. The δ 34 S values of pyrite separates in ores from the Axi and the Tawuerbieke gold deposits range from -4. 0‰ to 5. 3‰ (average 0. 7‰) and 0. 6‰ to 4. 7‰ (average 2. 5‰), with in- situ δ 34 S values of Au- bearing pyrite ranging from -2. 6 to 5. 6‰ (average 2. 4‰), and 1. 9‰ to 3. 8‰ (average 2. 9‰), suggesting that these two deposits display consistent sulfur source, namely the magma sulfur. The Pb isotopic compositions of pyrite from these two deposits are similar to those of the host volcanic rocks and granite porphyry, indicating that the ore- forming materials were sourced from the host magmatic rocks. Fluid inclusions, diagnostic minerals and ore textures indicate that fluid boiling was the main precipitation mechanism for the Au mineralization at Axi. Combined evidence from the occurrence of orebodies, mineral assemblages, ore textures, hydrothermal alteration and ore- forming materials suggests that the Axi is typical of low- sulfidation epithermal Au deposit, whereas the Tawuerbieke belongs to the transitional subepithermal style between porphyry and epithermal mineralization. Based on the characteristics of pyrite thermoelectric conduction type, denudation extent of orebody, ore textures, mineral assemblages and intrusion sizes, it can be inferred that the Axi and the Tawuerbieke deposits experienced different degrees of erosion (Axi＜Tawuerbieke), and that there is exploration potential for concealed porphyry Cu- Au mineralization beneath the Tawuerbieke deposit.