The lead–zinc mineralization belt along the southwestern margin of the Yangtze Block is one of the important source for lead, zinc, germanium and silver in China. More than 50% of the deposits in the region occur in carbonate rocks ranging in age from late Ediacaran to early Cambrian. Here we investigate the large Zubu F-Pb-Zn deposit located in the southwestern margin of the Yangtze Block. The ore bodies strike nearly NS in the dolomite fracture zone in the second member of the Cambrian Longwangmiao Formation and discontinuously extend for 0.7 km long. We present Sm-Nd isotopic data on the fluorite ore that yield an isochron age of 211 ± 11 Ma. Fluid inclusions in the fluorite show homogenization temperature between 88 and 247 °C with a peak at 130–180 °C, with salinity ranging between 0.18 and 22.23 wt% NaCl eqv. (average of 9.24 wt% NaCl eqv.), the ore-forming fluid has the characteristics of medium–low temperature and medium–low salinity. The rare earth element (REE) signature of fluorite display positive Eu anomaly and negligible negative to weak positive Ce anomaly. The δ¹⁸O_V-SMOW values range from 0.6 − 4.7 ‰, δD_V-SMOW values range from −41.1–27.6 ‰, fluorite Sr isotopic values range from 0.710668 to 0.711585, and galena Pb isotope ratios with the value of ²⁰⁶Pb/²⁰⁴Pb = 18.551–18.564, ²⁰⁷Pb/²⁰⁴Pb = 15.676–15.693, ²⁰⁸Pb/²⁰⁴Pb = 38.869–38.809. The field, petrologic, geochemical and isotopic data from our study lead to the following salient findings. (1) The ore-forming fluid of the F-Pb-Zn deposit was derived from the mixture of metamorphic water flowing through the basement with basin hot brine and meteoric water. (2) The ore-forming material of the deposit comes from the basement and sedimentary strata. (3) In conjunction with the geochronological data of regional ore deposits, the large-scale mineralization is inferred to have formed during a transitional stage from compression to extension setting related to the Indosinian orogeny after the closure of the late Triassic-early Jurassic (220–190 Ma) Paleo-Tethys Ocean.

扬子地块西南缘铅锌矿化带是我国铅、锌、锗、银的重要来源之一。该地区超过 50% 的矿床产于碳酸盐岩中，年龄从埃迪卡拉纪晚期到寒武纪早期。在这里，我们调查了位于扬子地块西南边缘的大型祖布 F-Pb-Zn 矿床。矿体在寒武系龙王庙组二段白云岩断裂带近北走向，不连续延伸0.7km。我们提供了萤石矿石的 Sm-Nd 同位素数据，其等时线年龄为 211 ± 11 Ma。萤石中的流体包裹体的均质化温度在 88 至 247 °C 之间，峰值在 130 至 180 °C，盐度范围在 0.18 至 22.23 wt% NaCl eqv 之间。（平均 9.24 wt% NaCl eqv.），成矿流体具有中低温、中低盐度的特点。萤石的稀土元素 (REE) 特征显示正 Eu 异常和可忽略的负到弱正 Ce 异常。δ¹⁸ O _V-SMOW值范围0.6-4.7‰，δD _V-SMOW值范围-41.1-27.6‰，萤石Sr同位素值范围0.710668-0.711585，方铅矿Pb同位素比值为²⁰⁶ Pb/ ²⁰⁴ Pb = 18.551–18.564, ²⁰⁷铅/ ²⁰⁴铅 = 15.676–15.693, ²⁰⁸铅/ ²⁰⁴铅 = 38.869–38.809。我们研究的油田、岩石学、地球化学和同位素数据导致以下显着发现。(1) F-Pb-Zn矿床的成矿流体来源于流经基底的变质水与盆地热卤水和大气水的混合物。(2)矿床的成矿物质来自基底和沉积地层。(3) 结合区域矿床年代学资料，推测大面积矿化形成于晚三叠世—早侏罗世（220 –190 Ma) 古特提斯洋。