The Zhazixi deposit hosted in sedimentary rocks is a major Sb-W deposit in South China. The mineral scheelite, which can be dated by the U-Pb method, commonly occurs in both tungsten (W)-dominated and antimony (Sb)-dominated ore veins of the deposit. Cathodoluminescence (CL) images reveal the presence of three distinct stages of scheelite (Sch-I, Sch-II and Sch-III) within the deposit. These three scheelites were dated using in-situ laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), yielding U-Pb ages of 158.1±5.4 Ma and 157.6 ± 4.9 Ma for Sch-I, 155 ± 11 Ma for Sch-II, and 151.3±6.1 Ma for Sch-III. These data suggest that the Zhazixi Sb-W deposit formed during the Late Jurassic (160–150 Ma) rather than the Late Triassic as previously suggested. Considering the temporal similarity with low-temperature hydrothermal Sb deposits in the Xiangzhong metallogenic province (XZMP), the formation of the Sb-W deposit may have followed a similar genetic model, where meteoric groundwater circulated to depth and extracted metals from fertile basement rocks through fluid-rock interaction, resulting in the generation of ore fluids. This study highlights that Late Jurassic low-temperature hydrothermal Sb-polymetallic mineralization in the XZMP is likely more extensive than previously perceived.

渣子溪沉积岩矿床是华南地区主要的锑钨矿床。白钨矿矿物可通过 U-Pb 法测年，通常出现在矿床的以钨 (W) 为主的矿脉和以锑 (Sb) 为主的矿脉中。阴极发光 (CL) 图像揭示了矿床中存在三个不同阶段的白钨矿（Sch-I、Sch-II 和 Sch-III）。这三种白钨矿使用原位激光烧蚀-电感耦合等离子体质谱仪 (LA-ICP-MS) 进行了测年，得出的 U-Pb 年龄为 158.1±5.4 Ma，Sch-I 为 157.6 ± 4.9 Ma，155 ± 11 Ma Sch-II 为 151.3±6.1 Ma，Sch-III 为 151.3±6.1 Ma。这些数据表明扎子溪锑钨矿床形成于晚侏罗世（160-150 Ma），而不是之前认为的晚三叠世。考虑到与湘中成矿区低温热液锑矿床在时间上的相似性，锑钨矿床的形成可能遵循类似的成因模式，即大气地下水循环到深处，通过以下方式从肥沃的基底岩石中提取金属：流体-岩石相互作用，导致矿液的产生。这项研究强调，XZMP 中的晚侏罗世低温热液锑多金属矿化可能比之前认为的更为广泛。