The Talate Pb-Zn deposit,located in the east of the NW-SE extending Devonian Kelan volcanic-sedimentary basin of the southern Altaides,occurs in the metamorphic rock series of the upper second lithological section of the lower Devonian lower Kangbutiebao Formation(D_1k_1~2).The Pb-Zn orebodies are stratiform and overprinted by late sulfide—quartz veins.Two distinct mineralization periods were identified:a submarine volcanic sedimentary exhalation period and a metamorphic hydrothermal mineralization period.The metamorphic overprinting period can be further divided into two stages:an early stage characterized by bedding-parallel lentoid quartz veins developed in the chlorite schist and leptite of the ore-bearing horizon,and a late stage represented by pyritechalcopyrite-quartz veins crosscutting chlorite schist and leptite or the massive Pb-Zn ores.Fluid inclusions in the early metamorphic quartz veins are mainly CO_2-H_2O-NaCI and carbonic(CO_2±CH_4±N_2) inclusions with minor aqueous inclusions.The CO_2-H_2O-NaCl inclusions have homogenization temperatures of 294-368℃,T_(m,CO2) of-62.6 to-60.5℃,T_(h,CO2) of 7.7 to 29.6℃(homogenized into liquid),and salinities of 5.5-7.4 wt%NaCl eqv.The carbonic inclusions have T_(m,CO2)of-60.1 to-58.5℃,and T_(h,Co2) of-4.2 to 20.6℃.Fluid inclusions in late sulfide quartz veins are also dominated by CO_2-H_2O-NaCl and CO_2±CH_4 inclusions.The CO_2-H_2O-NaCl inclusions have T_(b,tot) of142 to 360℃,T_(m,CO2)of-66.0 to-56.6℃,T_(h,CO2) of-6.0 to 29.4℃(homogenized into liquid) and salinities of 2.4-16.5 wt%NaCl eqv.The carbonic inclusions have T_(m,Co2)of-61.5 to-57.3℃,and T_(h,CO2) of-27.0to 28.7℃.The aqueous inclusions(L-V) have T_(m,ice) of-9.8 to-1.3℃ and T_(h,tot) of 205 to 412℃.The P-T trapping conditions of CO_2-rich fluid inclusions(100-370 MPa,250-368℃) are comparable with the late- to post-regional metamorphism conditions.The CO_2-rich fluids,possibly derived from regional metamorphism,were involved in the reworking and metal enrichment of the primary ores.Based on these results,the Talate Pb-Zn deposit is classified as a VMS deposit modified by metamorphic fluids.The massive Pb-Zn ores with banded and breccia structures were developed in the early period of submarine volcanic sedimentary exhalation associated with an extensional subduction-related back-arc basin,and the quartz veins bearing polymetallic sulfides were formed in the late period of metamorphic hydrothermal superimposition related to the Permian-Triassic continental collision. The Talate Pb-Zn deposit, located in the east of the NW-SE extending Devonian Kelan volcanic-sedimentary basin of the southern Altaides, occurs in the metamorphic rock series of the upper second lithological section of the lower Devonian lower Kangbutiebao Formation (D_1k_1 ~ 2). The Pb-Zn orebodies are stratiform and overprinted by late sulfide-quartz veins. Two distinct mineralization periods were identified: a submarine volcanic sedimentary exhalation period and a metamorphic hydrothermal mineralization period. The metamorphic overprinting period can be further divided into two stages : an early stage characterized by bedding-parallel lentoid quartz veins developed in the chlorite schist and leptite of the ore-bearing horizon, and a late stage represented by pyritechalcopyrite-quartz veins crosscutting chlorite schist and leptite or the massive Pb-Zn ores. Fluid inclusions in the early metamorphic quartz veins are mainly CO_2-H_2O-NaCI and carbonic (CO_2 ± CH_4 ± N_2) inclusions with minor aqueou s inclusions.The CO_2-H_2O-NaCl inclusions have homogenization temperatures of 294-368 ° C, T_ (m, CO2) of-62.6 to -60.5 ° C, T_ (h, CO2) of 7.7 to 29.6 ° C (homogenized into liquid) and salinities of 5.5-7.4 wt% NaCl eqv.The carbonic inclusions have T_ (m, CO2) of -60.1 to -58.5 ° C, and T_ (h, Co2) of-4.2 to 20.6 ° C. Fluid inclusions in late sulfide quartz veins are also dominated by CO_2-H_2O-NaCl and CO_2 ± CH_4 inclusions. The CO_2-H_2O-NaCl inclusions have T_ (b, tot) of142 to 360 ° C, T_ (m, CO2) of -66.0 to -56.6 ° C, h, CO2) of-6.0 to 29.4 ° C (homogenized into liquid) and salinities of 2.4-16.5 wt% NaCl eqv.The carbonic inclusions have T_ (m, Co2) of -61.5 to-57.3 ° C, and T_ (h, CO2 ) of-27.0 to 28.7 ° C. The aqueous inclusions (LV) have T_ (m, ice) of-9.8 to-1.3 ° C. and T_ (h, tot) of 205 to 412 ° C. The PT trapping conditions of CO_2-rich fluid inclusions (100-370 MPa, 250-368 ° C) are comparable with the late-to-post-regional metamorphism conditions. CO_2-rich fluids, possibly derived from regional metamorphism, were involved in the reworking and metal enrichment of the primary ores. Based on these results, the Talate Pb-Zn deposit is classified as a VMS deposit modified by metamorphic fluids.. The massive Pb-Zn ores with banded and breccia structures were developed in the early period of submarine volcanic sedimentary exhalation associated with an extensional subduction-related back-arc basin, and the quartz veins bearing polymetallic sulfides were formed in the late period of metamorphic hydrothermal superimposition related to the Permian-Triassic continental collision.