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Advances in Earth Science  2008, Vol. 23 Issue (9): 959-964    DOI: 10.11867/j.issn.1001-8166.2008.09.0959
A Preliminary Study of Radiocarbon Dating of Soil Humin and Shells in the Loess Sequence from Guanzhong Area Since 20 ka BP Using 14C Accelerator Mass Spectrometry Technique
Zhu Yizhi1,Yu Huagui1,2,Cheng Peng1,2, Lu Xuefeng1,3,Kang Zhihai1,Zhou Weijian1,3
1.State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, Xi'an 710075,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China; 3.Xi'an AMS Center 710054,China
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Reliable radiocarbon dating of Loess-paleosol sequence is not easy, The discrepency of dating results occurred in the previous work because of different dating materials and the laoking of powerful pretreatment. Here, we tested the feasibility of dating terrestrial mollusks fossil shells from the Loess Plateau, calibrated by the modern snail shell. Then; we compare the calibrated fossil shell results with the datings of the soil humin fraction and concentrated pollen in order to evaluate the reliability of the dating terrestrial mollusks fossil shells. If the fossil shell contains only aragonite form and their shell structure is examined by using X-ray diffraction, we shall be able to achieve reliable dating. Our results indicate that terrestrial shells are potentially useful as dating material.

Key words:  Loess in Guanzhong basin      Snail shell fossil      14C-AMS dating.     
Received:  09 January 2008      Published:  10 September 2008
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ZHU Yizhi
ZHOU Weijian
KANG Zhihai
LU Xuefeng
YU Huagui

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Zhu Yizhi,Yu Huagui,Cheng Peng, Lu Xuefeng,Kang Zhihai,Zhou Weijian. A Preliminary Study of Radiocarbon Dating of Soil Humin and Shells in the Loess Sequence from Guanzhong Area Since 20 ka BP Using 14C Accelerator Mass Spectrometry Technique. Advances in Earth Science, 2008, 23(9): 959-964.

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