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铁木尔特铅锌矿是阿尔泰克兰盆地内最主要的 VMS 型矿床。矿床受控于阿巴宫—库尔提断裂,铅锌矿体分布于该断裂 NE 逆冲盘的下泥盆统康布铁堡组地层绿泥石英片岩、大理岩或层状矽卡岩中。矿体形态多呈透镜状、似层状,并整合产于变质岩系中,发育多个矿化层。金属矿物有方铅矿、闪锌矿、黄铜矿、黄铁矿和磁黄铁矿等。铁木尔特铅锌矿床晚期发育多金属硫化物石英脉,至少可识别出3个流体包裹体组合(FIA)。FI0为高盐度流体包裹体组合,主要为含子矿物的多相包裹体(L-V-S 型),部分为气液两相包裹体(L-V 型),局限于单个石英颗粒内,包裹体呈无序分布,或呈孤立的单个包裹体分布, 包裹体的最终均一温度322～422.5℃。FI1为次生的CO_2-H_2O 流体包裹体组合,主要由单相(L_(CO_2))和两相(L_(CO_2)-L_(H_2O))的富CO_2包裹体组成,呈线性分布,穿透石英颗粒边界,明显属于次生包裹体范畴、FI2为碳质(CO_2-CH_4)流体包裹体组合,广泛发育,包裹体主要由单相(L_(CO_2)、L_(CO_2-CH_4)或 L_(CO_2-N_2))、少量两相(LCO,-LH’O)富CO。包裹体组成,大小5μm～20μm,成群定向分布,穿透石英颗粒边界并切断 FI1,是晚于 FI1的次生包裹体组合,反映晚期较大的构造—流体活动。对 FI2的详细研究表明,L_(CO_2)型包裹体的 T_(mCO_2)=-63.3～-57.7℃,T_(hCO_2)=-27.5～+29.7℃;L_(CO_2-CH_4)型或 L_(CO_2-N_2)型包裹体的 T_(mCO_2)=-80.5～-65.5℃,T_(hCO_2)=-56.0～-25.0℃;L_(CO_2)-L_(H_2O)型包裹体 CO_2相的 T_(mCO_2)=-66.9～-60.9℃,T_(hCO_2)=-13.3～+2.3℃,包裹体的最终均一温度 T_(h,total)=243.1～361.1℃。铁木尔特次生碳质流体组合,萨热阔布金矿主成矿阶段、赛都—多拉纳含金剪切带中早期透镜状石英脉碳质流体组合,以及阿舍勒等矿床的次生碳质流体组合,都具有相似的流体性质,均为高密度的CO_2-CH_2-N_2流体,其来源与石炭—二叠造山作用主期的区域动力热流变质作用有关。
Tromurite lead-zinc ore is the most important VMS type deposit in the Altay Basin. The deposit is controlled by the Aba-Kulti fault, and the Pb-Zn orebodies are distributed in the Lower Devonian Cambodian Formation schist, marble or stratiform skarn in NE fault plate of the fault . Ore body morphology mostly lenticular, layered, and integrated in metamorphic rocks, the development of multiple mineralization. Metallic minerals are galena, sphalerite, chalcopyrite, pyrite and pyrrhotite. The late onset of the polymetallic sulfide quartz veins in the Tymmort Pb-Zn deposit identified at least three fluid inclusions (FIA). FI0 is a combination of high-salinity fluid inclusions, mainly composed of heterogeneous inclusions (LVS type) with sub-minerals and partly gas-liquid two-phase inclusions (LV type) confined within a single quartz particle with inclusions disordered Distribution, or isolated single inclusion distribution, the final uniform temperature of inclusions 322 ~ 422.5 ℃. FI1 is a secondary CO_2-H_2O fluid inclusion assemblage composed mainly of single-phase (L_ (CO_2)) and two-phase (CO_2-L_ (H_2O) Quartz grain boundaries clearly belong to the secondary inclusions. FI2 is a combination of carbonaceous (CO_2-CH_4) fluid inclusions and develops extensively. The inclusions consist mainly of single-phase (L_ (CO_2), L_ (CO_2-CH_4) or L_ CO_2-N_2)), a small amount of two-phase (LCO, -LH’O) rich CO. The inclusions, 5μm ~ 20μm in size, distribute in groups and penetrate the boundaries of quartz grains and cut off the FI1, which is a combination of secondary inclusions later than FI1, reflecting the large late tectonic-fluid activity. The detailed study of FI2 shows that the T_ (mCO_2) of L_ (CO_2) type inclusions is-63.3 ~ -57.7 ℃ and T_ (hCO_2) = -27.5 ~ + 29.7 ℃. The L_ (CO_2_CH_4) T_ (mCO_2) = - 80.5 ~ -65.5 ℃ and T_ (hCO_2) = -56.0 ~ -25.0 ℃ respectively for the inclusions with N_2 type inclusions, and that of CO_2 phase in L_ (CO_2) -L_ (H_2O) = -66.9 ~ -60.9 ℃, T_ (hCO_2) = -13.3 ~ +2.3 ℃, the final homogenization temperature of the inclusions is T h (total) = 243.1 ~ 361.1 ℃. The Tiemurt secondary carbonaceous fluid assemblage, the main ore-forming stage of the Sazankuobu gold deposit, the early lenticular quartz vein carbonaceous fluid combination in the Sedo-Dorna gold-bearing shear zone, and the Ashele et al deposit The secondary carbonaceous fluid assemblages all have similar fluid properties, which are all high-density CO_2-CH_2-N_2 fluids, and their origin is related to the regional dynamic hydrothermal metamorphism in the main stage of Carboniferous-Permian orogenic activity.