中文摘要：

通过对西藏纳如松多铅锌矿床4套矿化型式的系统梳理,根据地质事实和相关同位素证据,初步建立了一个独立的和岩浆作用相关的热液铅锌成矿系统模式。纳如松多铅锌矿化和石英正长斑岩密切相关,目前已发现了产在斑岩外围的古新世典中组凝灰岩地层中的隐爆角砾岩型矿化、产在斑岩与二叠纪下拉组灰岩接触带上的矽卡岩型矿化、产在斑岩外围典中组凝灰岩与二叠纪昂杰组砂板岩岩性分界面上的矿层型矿化以及产在凝灰岩或砂板岩内部先存裂隙中的脉型矿化等4种铅锌矿化型式。它们均以绿帘石绿泥石化、硅化绢云母化和碳酸盐化为主要围岩蚀变类型,矿石矿物为方铅矿＋闪锌矿,主要脉石矿物为黄铁矿＋黄铜矿＋石英＋绢云母＋方解石,蚀变和矿物组合特征指示它们发育在同一矿化系统中,但成矿热液温度逐渐降低。隐爆角砾岩型和矽卡岩型矿化成矿流体δDV-SMOW值分布范围较大（-177‰~-118‰和-164‰~-139‰）,δ18OV-SMOW值分布范围较小（-2.76‰~3.29‰和-5.46‰~-4.58‰）,反映其主要来自发生了去气作用的岩浆水,并混合了少量大气降水。4种矿化型式的S同位素值按照隐爆角砾岩型（4.15‰）、矽卡岩型（7.92‰）、矿层型（8.49‰）和脉型（8.80‰）的顺序逐渐增大,反映其主要来自发生了H2S去气作用的残余岩浆相。矿区成矿斑岩与冷水坑斑岩型铅锌矿床的成矿斑岩极为相似,推测矿区深部也有斑岩型铅锌矿化的可能。一个独立的和岩浆作用相关的铅锌成矿系统模式由此建立,它包括了发育在挤压环境中所有和岩浆作用相关的铅锌矿化类型,可简述如下：新特提斯洋壳俯冲回转,地幔楔及上覆地壳部分熔融,纳如松多独具特色的斑岩岩浆形成;岩浆上升侵位,H2O及H2S去气,流体初溶,岩浆内部和顶部分别汇集了富氧化性质S和金属物质及富还原性质S和金属物质

英文摘要：

In the compressive environment, intrusion-related Pb-Zn mineralization includes porphyry, crytoex- plosive breccia, skarn, manto, and vein types. However, examples of ail of them occurring in the same mineral- ization system are less known. Narusongduo is a superlarge Pb-Zn deposit in the Gangdise metallogenic belt, Ti- bet. Except porphyry type, all Pb-Zn mineralization types mentioned above have been found in this deposit, which makes this deposit an excellent case to study the scientific question mentioned above. In this study, the authors present a preliminary description about the four Pb-Zn mineralization types and oxygen, hydrogen and sulfur isotopic analyses, and establish a descriptive and genetic model that involves all the mineralization types in an independent Pb-Zn mineralization system related to magmatism. The Pb-Zn mineralization in the Narusong- duo deposit has close relationship with the quartz syenite porphyry. Four Pb-Zn mineralization types have been found, i. e., crytoexplosive breccia type formed in the tuff strata of the Dianzhong Formation in Paleocene, skarn type formed in the contact between limestone of the Xiala Formation in Permian and quartz syenite por- phyry, manto type formed in the contact between sandstone and slate in the Angjie Formation in Permian and tuff in the Dianzhong Formation, and vein type formed in pre-existing fractures in tuff and sandstone-slate stra- ta. Epidotization, chloritization, silicification, sericitization and carbonation are main alteration types for the four mineralization types, galena and sphalerite are ore minerals, and pyrite, chalcopyrite, quartz, sericite and calcite are main gangue minerals. In accordance with the order of cyrtoexplosive type, skarn type, manto type and vein type, the host rock alteration becomes weaker, the epidote, chlorite, quartz, sericite and chalcopyrite decrease and eventually disappear, and the carbonate increases. These characteristics indicate a cooling evolution in a unified mineralization system. As for the fluids o