庙沟铅锌多金属矿床属于青城子矿集区外围近年发现的小型矿床。流体包裹体显微岩相鉴定和测试分析结果显示，庙沟铅锌多金属矿床流体包裹体发育较好，包裹体粒度为3 μm×2 μm～15 μm×4 μm，形态多以不规则状、椭圆形为主，少数为长方形、三角形等。包裹体类型主要为气液两相包裹体，气液比为5 %～45 %，以单独成行产出为主，少数呈孤立状分布。主成矿温度为270 ℃～300 ℃；盐度为0.99 %～5.17 %，为低盐度流体；密度为0.70～0.79 g/cm3，为低密度流体。推算成矿压力为5.0～8.9 MPa，成矿深度为0.50～0.89 km。氢、氧同位素分析结果显示，δ18OV-SMOW为10.89 ‰～12.50 ‰，δDV-SMOW为-97.8 ‰～-55.8 ‰，属于混合流体且具有多源演化特点。庙沟铅锌多金属矿床成矿流体特征与青城子矿集区有较大区别，二者不属于同一成矿阶段。综合分析认为，庙沟铅锌多金属矿床属于浅成中低温破碎蚀变岩型矿床。

The Miaogou lead-zinc polymetallic deposit is a newly discovered small-scale deposit located on the periphery of the Qingchengzi ore province. Fluid inclusion microscopic lithofacies identification and testing results show that fluid inclusions in the Miaogou lead-zine polymetallic deposit are well-developed, with sizes ranging from 3 pmx2 m to 15 umx4 um. They are predominantly irregular and elliptical, with a few rectangular and triangular forms. The inclusions are mainly two-phase gas-liquid inclusions with a gas-liquid ratio of 5 %-45 %, mostly occurring in clusters, with some isolated. The main mineralization temperature ranges from 270 °C to 300 °C, salinity ranges from 0.99 % to 5.17 %,indicating Iow-salinity fluids, and density ranges from 0.70 g/em3 to 0.79 g/cm ', indicating low-density fluids. Calculated ore-forming pressures range from 5.0 MPa to 8.9 MPa, with a mineralization depth of 0.50 km to 0.89 km. Hydrogen and oxygen isotope analysis shows 8'8Ov-sMow values of 10.89 %0-12.50 %o and & Dv-sMow values of -97.8 %o to -55.8 %o. suggesting mixed fluids with multi-source evolution. The characteristics of ore-forming fluids in the Miaogou lead-zinc polymetallic deposit significantly differ from those in the Qingchengzi ore province, indicating that they do not belong to the same mineralization stage. Comprehensive analysis suggests that the Miaogou lead-zinc polymetallic deposit is an epithermal medium-low temperature fractured and altered rock-type deposit.