本项目拟利用变质相平衡模拟、锆石/独居石U-Pb定年与微量元素和矿物包裹体分析以及云母40Ar-39Ar定年等方法，系统研究吕梁地区吕梁群巴罗式变质带和石榴斜长角闪岩的变质作用与变质时代。定量模拟不同变质带和岩石类型的变质过程、PT条件与P–T–t轨迹，阐明变质作用的空间演化规律以及变质年龄与变质程度/阶段的内在联系，探讨巴罗式变质作用的成因机制和吕梁地区的递增变质作用特征，为深入阐述吕梁地区的构造过程和华北克拉通中部造山带的构造演化历史提供确凿的变质地质学证据。

This project will systematically study the metamorphism and metamorphic ages of Barrovian metamorphic belt (Lüliang Group) and garnet amphibolite in the Lüliang area by using metamorphic phase equilibria modelling, zircon/monazite U-Pb dating, zircon/monazite trace elements/mineral inclusions and mica 40Ar-39Ar dating in order to quantitatively simulate the metamorphic evolution of the Barrovian metamorphic belt and garnet amphibolite, to determine their PT conditions and P–T–t path. Then, we will elucidate the spatial evolution of metamorphism and establish the linking between metamorphic age and metamorphic degree/stage. We will also discuss the genetic mechanism for Barrovian metamorphism and the features of progressive metamorphism in the Lüliang area. The results will be pivotal for understanding the tectonic process of the Lüliang area and the evolutionary process of the Trans-North China Orogen in the North China Craton.