CAJ | 학술논문

扎西康铅锌银锑多金属矿床是北喜马拉雅成矿带中重要的铅锌锑多金属矿床，对其成矿过程的研究对其深部资源预测具有重要的指导意义。本文通过野外地质调查结合成矿流体包裹体研究，获得该矿床成矿前硅化、成矿早期铁锰碳酸盐化、中早期毒砂黄铁矿化、中期含铅锌硅化、晚期含锑硅化和成矿后硅化方解石化的流体温度分别为297、280、264、251、215～247和183～237℃，盐度分别为17．80％、8．39％、6．50％、5．98％、2．75％－5．29％和4．28％NaCleq （wt）。研究表明，成矿流体为顺断裂运移的具有显著岩浆贡献的中高温、中等盐度、较高硫逸度含 CO2、CH4和 N 2的热液与中温低盐度下渗大气降水在断裂中混合的产物。两者的混合改变了流体温度、盐度和硫逸度等进而沉淀金属矿物形成矿体。锑矿化温度低于铅锌矿化温度，下部～247℃锑矿化的发现暗示深部有进一步找矿的空间。
찰서강연자은제다금속광상시북희마랍아성광대중중요적연자제다금속광상，대기성광과정적연구대기심부자원예측구유중요적지도의의。본문통과야외지질조사결합성광류체포과체연구，획득해광상성광전규화、성광조기철맹탄산염화、중조기독사황철광화、중기함연자규화、만기함제규화화성광후규화방해석화적류체온도분별위297、280、264、251、215～247화183～237℃，염도분별위17．80％、8．39％、6．50％、5．98％、2．75％－5．29％화4．28％NaCleq （wt）。연구표명，성광류체위순단렬운이적구유현저암장공헌적중고온、중등염도、교고류일도함 CO2、CH4화 N 2적열액여중온저염도하삼대기강수재단렬중혼합적산물。량자적혼합개변료류체온도、염도화류일도등진이침정금속광물형성광체。제광화온도저우연자광화온도，하부～247℃제광화적발현암시심부유진일보조광적공간。
The Zhaxikang polymetallic deposit is an important deposit in the Northern Himalayan Metallogenic Belt.Re-search on its mineralization process is important in guiding prediction of its resources.On the basis of field surveys,fluid inclusion was studied in this paper.The temperatures of the ore-forming fluids at silicification without mineralization stage, Fe,Mn carbonatization stage,silicification with arsenopyrite and pyrite,silicification with Pb-Zn mineralization stage,si-licification with Sb mineralization stage and calcite-quartz post mineralization stage are 297,280,264,25 1,215-247 and 183-237℃ respectively,and the salinities are 17.80%,8.39%,6.50%,5.98%,2.75%~5.29% and 4.28% NaCleq (wt)respectively.These results showed the ore forming fluids are mixtures of mid-salinity mid-temperature and low-salinity low-temperature fluids.The mid-salinity fluid contained ore forming materials,CO 2 ,CH4 and N 2 were contributed by magma and the fluid migrated along the NS-NNE fault zone.The low-salinity fluid was penetrated groundwater and cir-culated along fault zones.When the two types of fluid were mixing in the fault zones,temperature,salinity,activity of S were changed,and veined and lentoid ore bodies were formed in the fault zones.The temperature of Sb mineralization is lower than that of Pb-Zn mineralization,and the temperature of Sb mineralization in the lower position is about 247℃ sug-gested that the further exploration should be conducted at deeper sites.