贺兰山是孔兹岩带同时发育高压(HP)和超高温(UHT)泥质麻粒岩的地区，此外还发育中压(MP)泥质麻粒岩及基性麻粒岩，是研究HP和UHT两类泥质麻粒岩变质作用热力学条件和构造背景的理想场所。本项目拟以HP和UHT泥质麻粒岩为重点研究对象，通过对HP和UHT泥质麻粒岩、MP泥质麻粒岩及基性麻粒岩细致的岩相学观察，锆石和独居石年代学研究，结合NCKFMASHTO(+ZrO2)体系下运用Thermocalc软件进行T–X、P–X和P–T视剖面图模拟，确定各类麻粒岩的PT轨迹与时代，构建它们的PTt轨迹；对基性麻粒岩进行地球化学研究确定它们的原岩成因。在此基础上，确定HP和UHT泥质麻粒岩的PT轨迹关系和成因关系，阐明在同一地区发生HP和UHT变质作用的热力学条件和构造背景；揭示贺兰山麻粒岩相变质作用的地质背景及对孔兹岩带造山演化的构造意义。进而探讨古元古代板块构造和碰撞造山的地球动力学过程。

The Helanshan may be the only place in the Khondalite belt where both high-pressure (HP) and ultrahigh-temperature (UHT) pelitic granulites, beside of the medium pressure (MP) pelitic granulites and mafic granulites, have been discovered. Thus, it is a natural laboratory to study the thermodynamic conditions and tectonic setting required to form both the HP and UHT pelitic granulites. In this study, we intend to conduct the combined study of petrology, whole-rock element and isotope geochemistry, and geochronology on these different types of granulites, particularly the HP and UHT pelitic granulites. The P–T–t paths will be constructed based on the important replacement and reaction textures, the T–X、P–X and P–T pseudosections calculated by Thermocalc software, and zircon and monazite datings. Based on these results, we will determined the relationship between the P–T paths and origins of the HP and UHT pelitic granulites, and the thermodynamic conditions for their formations. In addition, we will determine the tectonic setting of the granulite-facies metamorphisms in the Helanshan and their tectonic implications for the orogenic evolution of Khondalite belt. And then the plate tectonic and the geodynamic process of continent-collisional orogeny during the Paleoproterozoic era will be discussed.