Metasediment-hosted Sb-(Au-W) deposits occur widely in the Jiangnan Orogen (South China), but their complicated metallogenic histories are still under debate. Ore formation models such as syngenetic (SEDEX), granitoid-related, and orogenic scenarios have been proposed by previous studies, but their metal provenance and fluid evolutionary processes are still uncertain. In this study, two typical Sb-(Au-W) deposits (Woxi and Banxi) from this region were studied by in-situ geochemical and geochronological analyses of sulfides to establish a general ore formation model for this type of deposit. Two stages of gold-related pyrite (Py1 and Py2) and one stage of stibnite in the Woxi Sb-(Au-W) deposit, and two stages of arsenopyrite (Apy1 and Apy2) and stibnite (Stb1 and Stb2) in the Banxi Sb deposit were differentiated. Compared to Py1, Py2 is depleted in V but enriched in Au, As, Bi, Pb and Ag, with more negative δ³⁴S_v-CDT and lower Pb isotopic values. Compared with stibnite at Woxi, stibnite at Banxi has higher but more variable contents of most trace elements (e.g., Li, Mg, Al, Si, Cu, Pb, Co, Ni, Fe, Sr and Mn, except for As) and lower Pb isotopic ratios. At Banxi, Stb2 has lower Fe, Cu, Pb, Co, Ni, Sr and Mn contents than Stb1, and Apy2 has higher Co, Ni, Zr, Ti, and Nb contents than Apy1. Analyses of Re-Os isotopes in four samples yielded an isochron age of 439 ± 3.4 Ma (2σ) for Apy1, with an initial ¹⁸⁷Os/¹⁸⁸Os of 0.3373 ± 0.0009. The above results indicate that early-stage Au mineralization at Woxi may have been orogeny-related, and that ore metals were derived mainly from local epimetamorphic sedimentary rocks with limited input from magmatic fluids. In contrast, the late-stage Sb mineralization at Banxi may have been influenced by deep granitic magmatism. We propose that the common temporal and spatial mineralization sequence of the metasediment-hosted Sb-(Au-W) ores is: orogenic-type gold (early stage; at deep levels of the ore field) → orogenic + magmatic-hydrothermal W (middle stage; at middle levels) → magmatic-hydrothermal + meteoric water Sb (late stage; at shallow levels). Both local metasedimentary rocks and granite magmatism provide metals and ligands for mineralization, with magmatic fluids playing an essential role in late-stage ore formation. Metasediment-hosted Sb-(Au-W) ores in this region exhibit similarities to both orogenic-type and intrusion-related gold systems.

变质沉积物承载的 Sb-(Au-W) 矿床广泛分布于江南造山带（华南），但其复杂的成矿历史仍存在争议。以前的研究已经提出了同生（SEDEX）、花岗岩相关和造山情景等成矿模型，但其金属来源和流体演化过程仍不确定。在这项研究中，通过对硫化物的原位地球化学和地质年代学分析研究了该地区两个典型的 Sb-(Au-W) 矿床（卧溪和板溪），以建立该类型矿床的一般成矿模型。卧溪Sb-(Au-W)矿床发育两期金黄铁矿（Py1和Py2）和一期辉锑矿，板溪Sb矿床发育两期毒砂（Apy1和Apy2）和辉锑矿（Stb1和Stb2）存款有区别。与 Py1 相比，³⁴ S _v-CDT和更低的 Pb 同位素值。与沃溪辉锑矿相比，板溪辉锑矿的大部分微量元素（如锂、镁、铝、硅、铜、铅、钴、镍、铁、锶和锰，除了As）含量较高但变化较大，低于铅同位素比率。在板溪，Stb2 的 Fe、Cu、Pb、Co、Ni、Sr 和 Mn 含量低于 Stb1，Apy2 的 Co、Ni、Zr、Ti 和 Nb 含量高于 Apy1。对四个样品的Re -Os 同位素分析得出 Apy1 的等时线年龄为 439 ± 3.4 Ma (2σ)，初始值为¹⁸⁷ Os/ ¹⁸⁸Os 为 0.3373 ± 0.0009。上述结果表明，卧溪早期金成矿可能与造山运动有关，矿石金属主要来源于局部浅变质沉积岩，岩浆流体输入有限。相比之下，板溪的晚期锑矿化可能受到深层花岗质岩浆作用的影响。我们提出变沉积物承载的Sb-(Au-W)矿石常见的时空成矿序列为：造山型金（早期；矿场深部）→造山+岩浆-热液W（中期）阶段；中层）→岩浆热液+大气水Sb（晚期；浅层）。当地的变沉积岩和花岗岩岩浆都为矿化提供了金属和配体，岩浆流体在后期成矿中起重要作用。该地区变质沉积物承载的 Sb-(Au-W) 矿石表现出与造山型和侵入相关金系统的相似性。