Dating of erosion surface and terraces in the eastern Qilian Shan, northwest China | |
Pan B. T. ; Gao H. S. ; Wu G. J. ; Li J. J. ; Li B. Y. ; Ye Y. G. | |
2007 | |
关键词 | geochronology erosion surface river terraces Qilian Shan northeastern margin southern england human occupation tibetan plateau river terraces loess section quaternary record uplift incision |
英文摘要 | The actively deformed foreland of eastern Qilian Shan (mountains) contains well-preserved geomorphic features such as erosion surfaces, river terraces and tectonically uplifted alluvial fans, providing suitable archives for research on regional tectonic activities and palaeoclimatic changes. These geomorphic surfaces are well dated by using a combination of magnetostratigraphy, electron spin resonance, thermoluminescence, infra-red stimulated luminescence, radiocarbon dating, and correlation with the well-established loess-palaeosol sequences of China. Our results show that the erosion surface formed about 1.4 Ma ago, and the age of river terraces is 1.24 Ma, 820-860 ka, 780 ka, 420-440 ka, 230-250 ka, 140 ka, 60 ka and 10 ka, respectively. Valley incision rates of e. 0.09-0.25 m ka(-1) have been identified. The repetitive stratigraphic and geomorphic pattern of these terraces indicates the fluvial sedimentation-incision cycles are tightly associated with the 100-ka glacial-interglacial climatic cycles. Copyright (c) 2006 John Wiley & Sons, Ltd. |
出处 | Earth Surface Processes and Landforms |
卷 | 32 |
期 | 1 |
页 | 143-154 |
收录类别 | SCI |
语种 | 英语 |
ISSN号 | 0197-9337 |
内容类型 | SCI/SSCI论文 |
源URL | [http://ir.igsnrr.ac.cn/handle/311030/23245] ![]() |
专题 | 地理科学与资源研究所_历年回溯文献 |
推荐引用方式 GB/T 7714 | Pan B. T.,Gao H. S.,Wu G. J.,et al. Dating of erosion surface and terraces in the eastern Qilian Shan, northwest China. 2007. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论