• 责任者：Peng Nan (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Liu Yongqing
• 刊名：Geological Bulletin of China
• 出版年：2013
• 卷期：32(2/3)
• 关键词：盆地演化 ; basin evolution ; 物源分析 ; provenance analysis ; 甘肃 ; Gansu Province
• 页码：p.456-475
• 图表：illus., 3 tables, 97 refs.
• 分类号：0803
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

Provenance analysis is an effective and important approach to tracing the origin of sedimentary basin fills and reconstructing the orogenic history of basin-bounding uplifts. In this paper, the authors used palaeocurrents, gravel components, detrital compositions and U-Pb ages of detrital zircons to systematically analyze the provenance of the Lower Cretaceous basin in the North Qilian Mountain-Beishan area and, furthermore, discussed the basin-mountain framework in the Early Cretaceous period. In Beishan area, the On such a basis, two provenances were identified. The south provenances were composed of metamorphic basement and Neoproterozoic magmatic rocks from the Central Qilian Terrance, the North Qilian Volcanic Arc （O）, magmatic rocks Originated from the collision （S2-3-D） and the Early Mesozoic igneous rocks in the South Qilian Mountain. However, the north provenances were composed of Paleoproterozoic magmatic rocks and deep metamorphic rocks from the Dunhuang-Kuruktag terrance, located in the northeast of Tarim Block, and the granites were produced by the collision and post-collision in the northwest of North China in Paleozoic-Early Mesozoic period. Besides, the evolution of the source suggests that the north source provided sediments for the Corridor in the initial period, and then both provenances existed in the early period. In the middle stage, the south provenance became the main source, while the northwest and south sources supplied sediments together finally. In a word, the eastern North Qilian Mountain-Beishan area seems to be a unified interior basin.