Au、Sb和W元素地球化学行为具有一定差异性，通常形成各自单独矿床。但在造山型和与侵入岩相关的金矿床中，这三种元素共同富集形成Au–Sb–W矿床，其成因机制仍然是一个未解决的重要科学问题。湘西地区金矿床具有独特Au–Sb–W元素组合，以沃溪大型金矿床最具代表性，其Sb、WO3规模也达到大、中型，全球罕见，是开展Au–Sb–W矿床成因研究的理想对象。到目前为止，沃溪矿床成矿时代、成矿物质和流体来源仍存在争议，矿床成因不是很清楚。本项目以沃溪矿床为研究对象，利用新近鉴定出的与自然金、辉锑矿、白钨矿共生的热液磷灰石，采用SIMS原位U-Th-Pb定年，精确限定成矿时代；利用LA-ICP-MS、SIMS等分析技术，查明白钨矿、磷灰石、黄铁矿的原位Sr、O、S同位素和微量元素组成，精细约束成矿物质和流体来源；揭示Au、Sb和W矿化的成因联系，查明矿床成因。本项目的实施，将为矿床成矿理论增添新内容。

The geochemical behavior of Au, Sb and W has certain differences, and they commonly form separate deposits. However, in the orogenic and intrusion-related mineralization system, these three elements are collectively enriched to form numerous Au–Sb–W deposits, and their genesis is still an important unresolved scientific issue. The gold deposits, located in western Hunan province, have a unique Au, Sb and W metal assemblage, and the large Woxi gold deposit is the most representative one among them. In the Woxi deposit, the Sb and WO3 content are large and medium in scale which is rare worldwide, making it the most representative case to reveal the formation mechanism of Au–Sb–W deposits. Unfortunately, the mineralization age, the source of ore-forming metals and fluid of the Woxi deposit are all equivocal, which leading to the diversity on its genesis. In this study, we focused on the Woxi deposit to perform in-situ analyses, such as SIMS and LA-ICP-MS, on apatite, scheelite and pyrite for their texture, trace-elements and Sr, O, and S isotopic compositions. These data will enable to obtain the accurate mineralization age, constrain the detailed ore-forming processes and source of metals and fluids. Combining all evidence, we hope to encode the genetic association among Au, Sb and W mineralization and address its genesis. The implementation of this project will significantly contribute to the development of the metallogenic theory of ore deposits.