PYROLYSIS-COMBUSTION METHOD USED TO DO 14C DATING OF HOLOCENE LOESS SEQUENCE AT LICUN PROFILE

YU Huagui; ZHU Yizhi; CHENG Peng; LIU Yonghao; WANG Shengli; XIAN Feng; CHEN Qingmin; LIU Zhao; ZHOU Weijian

doi:10.3724/SP.J.1140.2009.01073

2009 Vol. 29, No. 1

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Article navigation > Marine Geology & Quaternary Geology > 2009 > 29(1): 73-78

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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

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

Received Date: 10 September 2008

Revised Date: 08 October 2008

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.
- pyrolysis-combustion /
- radiocarbon dating /
- Py-V fractions /
- Py-R fractions /

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References

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