首页 | 本学科首页   官方微博 | 高级检索  
     检索      


A detailed post-IR IRSL chronology for the last interglacial soil at the Jingbian loess site (northern China)
Institution:1. Nordic Laboratory for Luminescence Dating, Department of Geosciences, University of Aarhus, Risø Campus, Denmark;2. Center for Nuclear Technologies, Technical University of Denmark, Risø Campus, Denmark;3. Leibniz Institute for Applied Geophysics, S3: Geochronology and Isotope Hydrology, Hannover, Germany;4. School of Geographical and Oceanographical Sciences, Nanjing University, China;5. Department of Earth Sciences, Uppsala University, Sweden;6. Geography, Earth and Environmental Sciences, University of Derby, UK;1. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;2. Department of Earth Sciences, University of Hong Kong, Hong Kong, China;3. Centre for Archaeological Science, School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW 2522, Australia;4. Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100049, China;1. State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;2. Salt Lake Chemistry Analysis and Test Center, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. Key Laboratory of Salt Lake Geology and Environment of Qinghai Province, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;5. Qinghai Normal University, Xining 810000, China;6. School of Earth Sciences, China University of Geosciences, Wuhan 430074, China;1. Institute of Geography, University of Cologne, Albertus-Magnus-Platz, D-50923 Cologne, Germany;2. Department of Geography, RWTH Aachen University, Templergraben 55, D-52056 Aachen, Germany;3. Institute of Geology, University of Cologne, Albertus-Magnus-Platz, D-50923 Cologne, Germany;1. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China;2. Laboratory for Earth Surface Processes, Department of Geography, Peking University, Beijing 100871, China;1. School of Geography Science, Nanjing Normal University, Nanjing, 210023, China;2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China;3. Leibniz Institute for Applied Geophysics; Stilleweg 2, 30655, Hannover, Germany;4. Croatian Geological Survey, Department of Geology, Sachsova 2, 10000, Zagreb, Croatia;5. University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Pierottijeva 6, HR-10000, Zagreb, Croatia
Abstract:The chronology of dust deposition and climate during the last interglacial is poorly known on the Chinese Loess Plateau. Here, 51 samples were taken from the ∼5 m S1 palaeosol (MIS5) at the desert marginal Jingbian site to develop what is currently the most detailed S1 chronology on the Plateau using instrumental dating techniques. We use the post-IR IRSL signal from sand-sized grains of K-rich feldspar. Signal resetting in the agricultural layer shows that it is possible to almost completely zero this signal in nature. First IR stimulation plateau measurements show that there is no clear dependence of De on first IR stimulation temperature between 50 and 260 °C suggesting negligible signal fading. Resultant ages are consistent with a last interglacial age (∼130 to ∼75 ka) and are also consistent within errors with continuous linear sedimentation rates. The average mass accumulation rate for S1 is ∼150 g m−2 a−1, considerably higher than at many other sites but within the overall range of Loess Plateau estimates. The remarkably stable sediment accumulation at the site contrasts with a more complex record of environmental and monsoonal change recorded in grain-size and magnetic susceptibility.
Keywords:Chinese loess  Last interglacial soil (S1)  High sampling density  Post-IR IRSL
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号