Abstract Being one of the largest intra-continental orogens of the world, the Tian Shan orogenic belt was uplifted to its present elevation due to the far-field effect of the India-Asia convergence. In this study, we performed a systematic study on the Upper Oligocene-Quaternary sedimentary rocks from the southern Junggar basin, including conglomerate clast counting and detrital zircon U-Pb dating, to reconstruct the Late Cenozoic uplift history of the northern Tian Shan mountain range. The new detrital zircon U-Pb data provide new constrains on the Late Cenozoic intra-continental deformation of the Borohoro range. The Yili-Central Tian Shan and North Tian Shan were the major sources for the Junggar basin during the Latest Cretaceous-Paleogene period. At that time, the Borohoro range was characterized by low topography and wide drainage pattern. As the uplift of the North Tian Shan commenced at ~25–23 Ma, the high topography of the northern Borohoro range blocked the transport of sediments from the Yili-Central Tian Shan to the north. The North Tian Shan became the primary provenance area of the southern Junggar basin. According to sedimentary provenance analysis and geomorphologic survey, we infer that the Yili-Central Tian Shan started to uplift at 12–9 Ma. Combined with previously published data, our results suggest that the Middle Miocene uplift event most likely occurred in both the hinterland and foreland regions along the whole Tian Shan mountain range.

中文翻译：

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北天山山脉晚新生代构造地貌演化——从准噶尔盆地南部上渐新世-第四纪碎屑锆石颗粒U-Pb年龄洞察

摘要 天山造山带是世界上最大的陆内造山带之一，受印亚辐合的远场效应抬升至目前的海拔高度。在这项研究中，我们对准噶尔盆地南部的上渐新世-第四纪沉积岩进行了系统研究，包括砾岩碎屑计数和碎屑锆石 U-Pb 定年，以重建北天山山脉晚新生代隆升历史。新的碎屑锆石 U-Pb 数据为 Borohoro 山脉晚新生代陆内变形提供了新的约束。伊犁—中天山和北天山是准噶尔盆地晚白垩世—古近纪的主要来源。当时，博罗霍罗山脉的特点是地势低洼，流域宽阔。随着北天山的隆升开始于~25-23 Ma，北部博罗霍罗山脉的高地势阻碍了伊犁-中天山向北的沉积物输送。北天山成为准噶尔盆地南部的主要物源区。根据沉积物源分析和地貌调查，我们推断伊犁-中天山在12-9 Ma开始隆升。结合先前发表的数据，我们的结果表明，中中新世隆起事件最有可能发生在整个天山山脉的腹地和前陆地区。北天山成为准噶尔盆地南部的主要物源区。根据沉积物源分析和地貌调查，我们推断伊犁-中天山在12-9 Ma开始隆升。结合先前发表的数据，我们的结果表明，中中新世隆起事件最有可能发生在整个天山山脉的腹地和前陆地区。北天山成为准噶尔盆地南部的主要物源区。根据沉积物源分析和地貌调查，我们推断伊犁-中天山在12-9 Ma开始隆升。结合先前发表的数据，我们的结果表明，中中新世隆起事件最有可能发生在整个天山山脉的腹地和前陆地区。