中文摘要：

轮郎矽卡岩型铅锌矿床位于冈底斯斑岩铜矿带北侧的铅锌银成矿带。本文基于该矿床成矿地质条件，对矽卡岩型矿石中主要的金属矿物闪锌矿、方铅矿、磁黄铁矿和黄铁矿的S、Pb同位素特征进行研究，进一步探讨了矿床成矿物质来源，并与区域矿产特征进行对比。结果显示，矿石矿物的δ34S为-2.3‰～4.1‰，平均值为1.46‰，其频率直方图具有塔式分布特征，具幔源硫特征。矿石矿物的206Pb/204Pb为18.179～18.692，平均值为18.543；207Pb/204Pb为15.588～15.802，平均值为15.687；208Pb/204Pb为38.532～39.305，平均值为38.900;μ值在9.44～9.83之间，具有上地壳与地幔混合的造山带铅特征。轮郎矿床S、Pb同位素特征与冈底斯成矿带北亚带矽卡岩型矿床类似。成矿物质主要来源于念青唐古拉结晶基底片麻岩，部分来自造山带幔源物质。

英文摘要：

The Lunlang skarn-type lead-zinc deposit is located in the lead-zinc-silver metallogenic belt on the north side of the Gangdise porphyry copper ore belt. Based on the ore-forming geological conditions, the authors systematically studied the S, Pb isotopic composition characteristics of sphalerite, galena, pyrrhotite and pyrite in the ore, and investigated the sources of the ore-forming materials in comparison with the characteristics of regional mineral resources. It is shown that the δ34S values of the minerals vary in the range of -2.3‰~4.1‰ with an average of -1.46‰, and the δ34S histogram is distributed approximately in a tower shape, which indicates a mantle source. The 208Pb/204Pb ratios are between 38.532 and 39.305 （38.900 on average）, the 207Pb/204Pb ratios are between 15.588 and 15.802 （15.687 on average）, the 206Pb/204Pb ratios are between 18.179 and 18.692 （18.543 on average）, and the μ values are between 9.44 and 9.83, suggesting that Pb was derived from a orogenic belt whose source was composed of the upper crust and the mantle. S, Pb isotopic characteristics of the Lunlang deposit are identical with those of other skarn deposits in northern subbelt of the Gangdise metallogenic belt. The ore-forming materials of the Lunlang deposit was mainly derived from materials of Nyainqentanglha basement gneiss, and partly from the mantle.