本项目围绕月球起源和演化的科学问题，从月球挥发组分含量及其同位素组成特征展开工作。以各种岩石类型的月球陨石（斜长质、铁镁质、混合型角砾岩、月海玄武岩）为研究对象，在矿物岩石学工作的基础上，利用高分辨率高精度的离子探针测定其中磷灰石的U-Pb年龄、稀土元素和挥发组分（H，F，和Cl）含量、以及H和Cl同位素组成，揭示月球内部的挥发组分含量和同位素组成特征。本项目试图解决的科学问题是：月球内部水和其他挥发组分的含量是多少？月球水的来源问题？月球Cl同位素的组成特征和分馏机制？

This project aims to study the formation and evolution of the moon, focusing on the volatile components and their isotopic compositions. We will select various types of lunar meteorites (Th-poor feldspathic breccias, Th-rich mafic breccias, mingled breccias，and mare basalts) as the research targets. On the basis of their petrographical and mineralogical studies, we will apply the ion microprobe to measure the U-Pb ages, REE and volatile components, and H and Cl isotopic compositions of lunar apatite. The goals of this project are to determine the concentrations of volatile components in the moon, to trace the origin of lunar water, and to characterize the lunar Cl isotopic system and its fractionation mechanism.