水在火星的地质演化历史，包括火星的岩浆过程、表面蚀变过程以及可能的生命过程中起着至关重要的作用。近年来的研究对于火星内部的水含量并没有很好的约束，存在很大争议。本项目将以玄武质火星陨石Shergottites中出现的磷酸盐矿物为主要研究对象，通过扫描电镜、电子探针和阴极发光等技术分析磷酸盐的结构特征和成分，探讨它们的形成条件。在此基础上，采用先进的纳米离子探针（Nano-SIMS）测试手段，分析磷酸盐矿物中的水含量和H同位素组成，进而估算火星陨石原始母岩浆（源区）的水含量。本项目将提供更多精确的火星岩浆源区的水含量信息资料，从而为探讨火星水的演化历史提供依据。

Water played a crucial role in Mars' geologic history, including Martian magmatic processes, surface erosion and the possibility of life on Mars. Therefore precise knowledge about the water content in the Martian interior has been of particular important. However, it's still an ongoing subject of debate about the water content of the Martian interior. This project will focus on hydrous mineral phosphate that occurred in basaltic martian Shergottites. By using scanning microprobe, electron microprobe and CL, we will analyze the texture and composition of the phosphates and unravel their formation conditions. Furthermore, we will analyses the water contents and H isotopes of the phosphates using modern Nano-SIMS technique, and then evaluate the amount of water in their parental magmas. In summary, this project will provide more precise estimate for the water content of the martian magmatic source region and information for the evolution history of water on Mars.