YU Huagui, ZHU Yizhi, CHENG Peng, LIU Yonghao, WANG Shengli, XIAN Feng, CHEN Qingmin, LIU Zhao, ZHOU Weijian. PYROLYSIS-COMBUSTION METHOD USED TO DO 14C DATING OF HOLOCENE LOESS SEQUENCE AT LICUN PROFILE[J]. Marine Geology & Quaternary Geology, 2009, 29(1): 73-78. DOI: 10.3724/SP.J.1140.2009.01073
Citation: YU Huagui, ZHU Yizhi, CHENG Peng, LIU Yonghao, WANG Shengli, XIAN Feng, CHEN Qingmin, LIU Zhao, ZHOU Weijian. PYROLYSIS-COMBUSTION METHOD USED TO DO 14C DATING OF HOLOCENE LOESS SEQUENCE AT LICUN PROFILE[J]. Marine Geology & Quaternary Geology, 2009, 29(1): 73-78. DOI: 10.3724/SP.J.1140.2009.01073
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PYROLYSIS-COMBUSTION METHOD USED TO DO 14C DATING OF HOLOCENE LOESS SEQUENCE AT LICUN PROFILE

  • 1 State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, Xi'an 710075, China;

  • 2 Graduate School, Chinese Academy of Sciences, Beijing 100049, China;

  • 3 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;

  • 4 Xi'an AMS Center, Xi'an 710054, China

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  • Received Date: September 09, 2008
  • Revised Date: October 07, 2008
    Graphical Abstract
    • Abstract
  • The onerous chemical extractions for soil organic matter (SOM) fractions do not always produce satisfactory 14C dates. In an effort to develop an alternative method, the pyrolysis-combustion technique was investigated to partition SOM into pyrolysis volative (Py-V) and pyrolysis residue (Py-R) at 400℃, and dated the two component parts separately by Accelerate Mass Spectrometry (AMS). Compared with the environmental archaeology sequence at the Licun Holocene profile, the Py-V fractions yielded 14C data more reasonable than the counterpart Py-R fractions in the culture sequence, but on the contrary, the Py-R fractions yield 14C data more convinced in the loess stratigraphic sequence. Zhouyuan loess was probably developed about 9 300 BP ago, and accumulated for 6 000 years.
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    • References (26)
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