西域砾岩是分布于青藏高原北缘天山、昆仑山一带的一套晚新生代砾石堆积地层，是青藏高原北部构造运动和全球气候变化的重要信息载体，因此获知其可靠的年代信息对于理解高原隆升及地貌演化过程尤为关键。宇宙成因核素26Al/10Be埋藏测年是近年来发展并不断完善的同位素测年新技术，可直接对含石英矿物的砾石样品定年，测年上限可达5 Ma，具有应用于西域砾岩年代学研究的潜力。本项目拟采用26Al/10Be埋藏测年方法，选择青藏高原北部西南天山山前保存完整、堆积厚度较大的博古孜河剖面，开展西域砾岩埋藏年代学研究，同时进行古侵蚀速率和堆积速率的相关研究，通过等时线方法检验和分析西域砾岩26Al/10Be埋藏测年的可信度并探讨其相关影响因素，为我国西北地区晚新生代砾石沉积地层的埋藏年代学研究提供科学依据。

Distributed along the periphery of Tianshan and Kunlun Mountains in the northern margin of Tibetan Plateau, Xiyu conglomerate formation is a unit of late Cenozoic gravel deposit which provides significant information of tectonic activities of the Northern Tibetan Plateau and global climate changes. It is crucial for attaining its depositional age in order to better understand the growth of Tibetan Plateau and related landscape evolution process. Cosmogenic nuclides 26Al/10Be burial dating is an emerging radioisotopic dating technique which could be used in dating gravel samples containing quartz mineral up to 5 Ma. This study intends to use 26Al/10Be burial dating method to determine the age range of the Xiyu conglomerates in the Boguzihe section, an intact and well-preserved stratigraphy with great depth in the foreland of southwestern Tianshan. Combining with the study of paleo-erosion and accumulation rates, reliability verification of 26Al/10Be burial dating on Xiyu conglomerate by isochron method, and associated impact factors discussion, the work of this study attempts to make contribution for the future study of burial dating of late Cenozoic gravel deposits in the northwestern China.