Preliminary study on radiocarbon AMS dating of pollen |
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| Authors: | Weijian Zhou Jie Zhou Jiayi Xiao D Donahue A J T Jull |
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| Institution: | (1) State Key Laboratory of Loess and Quaternary Geology, 710054 Xi’an, China;(2) Nanjing Normal University, 210097 Nanjing, China;(3) NSF-AMS Facility, University of Arizona, AZ 85721 Tucson, USA |
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| Abstract: | 17 samples were collected from aeolian and lacustrine profiles within the environment sensitive zone of the Loess Plateau,
and an experimental method was established which is suitable for pollen extraction from aeolian sediment. A comparative study
of pollen dating was carried out using the accelerator mass spectrometry (AMS)14C dating of known age samples, and then an experiment with the pollen concentrates was performed. The results indicate that
pollen that has been deposited simultaneously with sediment in a stable environment can provide reliable ages. This technique
will provide a way of improving the chronological framework for the Loess Plateau since the late Pleistocene. TheI4c dating was combined with field investigations, and from the geological record within this zone, evidence was extracted of
four major monsoon precipitation changes during the transition from the late Pleistocene to Holocene.
Project supported by the National Natural Science Foundation of China (Grant Nos. 49894170, 49725308), Chinese Academy of
Sciences (Nos. KZ-951-A1-402& KZ-952-S1-419), and State Committee of Science and Technology of China. |
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| Keywords: | pollen concentrates AMSl4C dating paleomonsoon precipitation environment sensitive zone |
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