14C dating of soil organic carbon (SOC) in loess-paleosol using sequential pyrolysis and accelerator mass spectrometry (AMS)

Peng Cheng, Weijian Zhou, Hong Wang, Xuefeng Lu, Hua Du

Research output: Contribution to journalArticle

Abstract

The chemical extraction of soil organic carbon (SOC) fractions from soils often does not produce satisfactory results for radiocarbon dating. In this study, a sequential pyrolysis technique was investigated. The soil was pyrolyzed at temperatures of 200, 400, 600, and 800 °C to partition organic carbon into pyrolytic volatile (Py-V) and pyrolytic residue (Py-R) fractions. The preliminary results show that the 14C dates of both fractions become progressively older as the pyrolysis temperature is increased. In addition, the ages of the Py-V fractions are consistently younger than the corresponding Py-R fractions extracted at the same temperature. Experimental results of known-age paleosol samples indicate that the Py-V fractions obtained between 600 and 800 °C yield the most reliable ages. This technique provides a new approach to improve the accuracy of 14C dating of loess-paleosol sequences.

Original languageEnglish (US)
Pages (from-to)563-570
Number of pages8
JournalRadiocarbon
Volume55
Issue number2-3
DOIs
StatePublished - Sep 25 2013

Fingerprint

accelerator mass spectrometry
paleosol
pyrolysis
loess
organic carbon
soil
temperature
radiocarbon dating
dating
Paleosols
Temperature
Soil
Carbon
14C Dating
Accelerator Mass Spectrometry
Pyrolysis
Loess

ASJC Scopus subject areas

  • Archaeology
  • Earth and Planetary Sciences(all)

Cite this

14C dating of soil organic carbon (SOC) in loess-paleosol using sequential pyrolysis and accelerator mass spectrometry (AMS). / Cheng, Peng; Zhou, Weijian; Wang, Hong; Lu, Xuefeng; Du, Hua.

In: Radiocarbon, Vol. 55, No. 2-3, 25.09.2013, p. 563-570.

Research output: Contribution to journalArticle

Cheng, Peng ; Zhou, Weijian ; Wang, Hong ; Lu, Xuefeng ; Du, Hua. / 14C dating of soil organic carbon (SOC) in loess-paleosol using sequential pyrolysis and accelerator mass spectrometry (AMS). In: Radiocarbon. 2013 ; Vol. 55, No. 2-3. pp. 563-570.
@article{558a4d40fb034fe783408611cf61c6b0,
title = "14C dating of soil organic carbon (SOC) in loess-paleosol using sequential pyrolysis and accelerator mass spectrometry (AMS)",
abstract = "The chemical extraction of soil organic carbon (SOC) fractions from soils often does not produce satisfactory results for radiocarbon dating. In this study, a sequential pyrolysis technique was investigated. The soil was pyrolyzed at temperatures of 200, 400, 600, and 800 °C to partition organic carbon into pyrolytic volatile (Py-V) and pyrolytic residue (Py-R) fractions. The preliminary results show that the 14C dates of both fractions become progressively older as the pyrolysis temperature is increased. In addition, the ages of the Py-V fractions are consistently younger than the corresponding Py-R fractions extracted at the same temperature. Experimental results of known-age paleosol samples indicate that the Py-V fractions obtained between 600 and 800 °C yield the most reliable ages. This technique provides a new approach to improve the accuracy of 14C dating of loess-paleosol sequences.",
author = "Peng Cheng and Weijian Zhou and Hong Wang and Xuefeng Lu and Hua Du",
year = "2013",
month = "9",
day = "25",
doi = "10.2458/azu_js_rc.55.16185",
language = "English (US)",
volume = "55",
pages = "563--570",
journal = "Radiocarbon",
issn = "0033-8222",
publisher = "University of Arizona",
number = "2-3",

}

TY - JOUR

T1 - 14C dating of soil organic carbon (SOC) in loess-paleosol using sequential pyrolysis and accelerator mass spectrometry (AMS)

AU - Cheng, Peng

AU - Zhou, Weijian

AU - Wang, Hong

AU - Lu, Xuefeng

AU - Du, Hua

PY - 2013/9/25

Y1 - 2013/9/25

N2 - The chemical extraction of soil organic carbon (SOC) fractions from soils often does not produce satisfactory results for radiocarbon dating. In this study, a sequential pyrolysis technique was investigated. The soil was pyrolyzed at temperatures of 200, 400, 600, and 800 °C to partition organic carbon into pyrolytic volatile (Py-V) and pyrolytic residue (Py-R) fractions. The preliminary results show that the 14C dates of both fractions become progressively older as the pyrolysis temperature is increased. In addition, the ages of the Py-V fractions are consistently younger than the corresponding Py-R fractions extracted at the same temperature. Experimental results of known-age paleosol samples indicate that the Py-V fractions obtained between 600 and 800 °C yield the most reliable ages. This technique provides a new approach to improve the accuracy of 14C dating of loess-paleosol sequences.

AB - The chemical extraction of soil organic carbon (SOC) fractions from soils often does not produce satisfactory results for radiocarbon dating. In this study, a sequential pyrolysis technique was investigated. The soil was pyrolyzed at temperatures of 200, 400, 600, and 800 °C to partition organic carbon into pyrolytic volatile (Py-V) and pyrolytic residue (Py-R) fractions. The preliminary results show that the 14C dates of both fractions become progressively older as the pyrolysis temperature is increased. In addition, the ages of the Py-V fractions are consistently younger than the corresponding Py-R fractions extracted at the same temperature. Experimental results of known-age paleosol samples indicate that the Py-V fractions obtained between 600 and 800 °C yield the most reliable ages. This technique provides a new approach to improve the accuracy of 14C dating of loess-paleosol sequences.

UR - http://www.scopus.com/inward/record.url?scp=84884398000&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84884398000&partnerID=8YFLogxK

U2 - 10.2458/azu_js_rc.55.16185

DO - 10.2458/azu_js_rc.55.16185

M3 - Article

AN - SCOPUS:84884398000

VL - 55

SP - 563

EP - 570

JO - Radiocarbon

JF - Radiocarbon

SN - 0033-8222

IS - 2-3

ER -