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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/2234

Title: Comparison of radiocarbon ages from different organic fractions in tropical peat cores: insights from Kalimantan, Indonesia.
Authors: Wust, RAJ
Jacobsen, GE
van der Gaast, H
Smith, AM
Keywords: Isotope Dating
Indonesia
Peat
Mass Spectroscopy
Organic Matter
Pollen
Issue Date: Dec-2008
Publisher: University of Arizona
Citation: Wust, R. A. J., Jacobsen, G. E., van der Gaast, H., & Smith, A. M. (2008). Comparison of radiocarbon ages from different organic fractions in tropical peat cores: insights from Kalimantan, Indonesia. Radiocarbon, 50(3), 359-372.
Abstract: Various organic fractions of an Indonesian tropical peat deposit were dated using radiocarbon accelerator mass spectrometry (AMS). Four different depth layers, deposited during the last 28,000 14C yr, were analyzed and the data compared to bulk sample analyses. The pollen extracts consistently produced the oldest dates. The bulk samples (<250 μm and <100 μm) often yielded the youngest dates. The age difference between the individual fractions depended on the layer depth and hence the true age of the sampled peats. The age discrepancy was highest (~16,000 14C yr) in the oldest peat material. We interpret this to be a consequence of the input of organic matter over a long period of time, with peat oxidation and/or no peat accumulation during the last glacial maximum (LGM). The age discrepancies were smaller (between 10 and 900 14C yr) for the Holocene peat samples. It was concluded that the pollen extract fraction might be the most reliable fraction for dating tropical peat deposits that are covered by deeply rooting vegetation. © 2008, University of Arizona
URI: https://digitalcommons.library.arizona.edu/restrictedobjectviewer?o=http://radiocarbon.library.arizona.edu/Volume50/Number3/ec5b4777-d221-4df2-bbac-c96d817f6718
http://apo.ansto.gov.au/dspace/handle/10238/2234
ISSN: 0033-8222
Appears in Collections:Journal Articles

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