(U-Th)/He定年体系具有用样量少、分析周期短、对温度敏感等独特的优势，已经成为低温热年代学（＜300℃）的主要支柱技术之一，广泛应用于造山带后期演化、沉积盆地热演化、矿床抬升剥露过程等研究工作。目前国内已经建成的(U-Th)/He定年方法所能支撑的低温热年代学研究温度段是＜120℃和>180℃，在120℃~180℃这个“温度窗口”存在技术缺失。榍石在地质体中分布广泛，其(U-Th)/He体系能够记载地质体在100℃~180℃热演化信息。国内还没有榍石(U-Th)/He定年实验室，也没有相关应用研究成果报道。本项目拟通过硬件配置及实验流程综合研究，建立我国第一个榍石(U-Th)/He定年实验室，并研究不同成因榍石中He扩散特征及测定封闭温度，解决(U-Th)/He低温热年代学研究在120℃~180℃“温度窗口”的技术缺失问题，从而完善我国的低温热年代学技术体系。

(U-Th)/He dating has become one of the most important technology of low-temperature thermochronology, with the advantages of less sample consuming, short processing cycle and sensitive to temperature. This method has been used in many geological researches such as revealing later evolutionary stage of orogenic belts and thermal evolution of sedimentary basin, constraining uplift and exhumation process of ore deposit and so on. In our country, the existing (U-Th)/He dating method can constrain temperature range in ＜120℃ and >180℃, lacking the temperature range between 120℃ and 180℃. Titanite are widely distributed in geological bodies, the titanite (U-Th)/He system can record thermal evolution information between 100℃ and 180℃. No titanite (U-Th)/He dating laboratory has been built and no relevant application research has been reported in our country. By configuring hardware and researching on experimental process, this project intends to establish the first titanite (U-Th)/He dating laboratory in China, and reveal the helium diffusion characteristic in different genetic types of titanite and calculating closure temperature. By doing this, the lack of “temperature window” between 120℃ and 180℃ in (U-Th)/He low-temperature thermochronology research can be solved, and the technical system of low-temperature thermochronology in China can be perfected.