中文摘要：

滇西北核桃坪铅锌矿是保山地块内沿澜沧江断裂带发育的一个大型铅锌多金属矿床，矿体严格受近SN向的断裂带及层间破碎带控制，赋存于上寒武统核桃坪组和沙河厂组大理岩化灰岩及矽卡岩中。文章在分析矿床地质特征的基础上，通过对V1矿体的氢、氧、碳、硫、硅和铅同位素地球化学的示踪研究，探讨了成矿溶液中水、碳、硅、硫和铅的来源以及成矿流体的演化问题。研究表明，v1矿体中矿石的石英8培0l水值变化范围为6．1‰～7．6‰，平均为6．7‰，其~Dv-sMow值变化范围为一100900～一108900，平均为一104％o，说明成矿流体主要来自深部岩浆分异水，并在后期成矿作用过程中有地层建造水和大气降水的加入；矿石中方解石的δ^13CV-PDB和δ^13O水值分别为-6．6‰～-5．9‰和5．0‰～5．2‰，反映成矿流体的碳、氧具有深部流体与围岩发生交代反应的特征。硅、硫和铅同位素具深部岩浆或地幔来源的特点，但遭受后期壳源物质的混染。据此提出该矿床是与深部岩浆热液或幔源流体贯人有关的构造热液脉型矿床，其成矿作用受控于深部过程的驱动和控制，可为指导地质找矿提供依据。

英文摘要：

Located in the Baoshan massif along the Lancangjiang tectonic-metallogenic belt in northwestern Yunnan Province, the Hetaoping Pb-Zn deposit is one of the typical hydrothermal polymetallic orefields with many unique features. The stratified and vein-type Pb-Zn-polymetallic ore bodies exist in skarn and marbleized lime- stone of the Upper Cambrian strata, and are controlled exclusively by approximately SN-trending compresso-ten- sional interstratal faults and associated faults. Based on analyzing geological characteristics, this paper mainly studied geochemistry of hydrogen, oxygen, carbon, sulfur, silicon and lead isotopic compositions of No. V1 orebody in this ore deposit. The results show that oxygen isotopic compositions of quartz in ores range from 6.1‰ to 7.69‰ with an average of 6.7‰, and hydrogen isotopic compositions of quartz range from - 100‰ to - 108‰ with an average of - 104‰, suggesting that metallogenic fluids were mainly derived from deep concealed magmatic activities and mixed with meteoric water and shallow-seated water. Carbon and oxygen isotopic compositions of calcite range from - 6.6‰ to - 5.9‰ and 5.0‰ to 5.2‰, respectively, quite similar to the carbon and oxygen isotopic compositions of magmatic fluids mixed with crust-derived water, implying that hydrothermal ore-forming fluids were mainly derived from magmatism or mantle fluids. Silicon, sulfur and lead isotopes are also similar to those in magmatic hydrothermal solutions or mantle fluids, but might have been sub- jected to the mixture with crust-derived matter during the late ore-forming process. Therefore, all the evidence supports the argument that the deposit is a typical tectonic-skarn-bound hydrothermal deposit, whose sources were mainly derived from magmatic hydrothermal solution or mantle fluids through fault belts and were mixed with shallow-seated fluids during the ore-forming process. Ore-forming elements were carried by tectonic-fluids from magma or mantle to orogenic belts, and were most likely driven and