Nilsson, M., Klarqvist, M., Bohlin, E. and Possnert, G. (2001). Variation in 14C age of macrofossils and different fractions of minute peat samples dated by AMS. Holocene 11 (5). Vol 11(5), pp. 579-586.
 Title The title of the publication or report |
Variation in 14C age of macrofossils and different fractions of minute peat samples dated by AMS | ||
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Issue The name of the volume or issue |
Holocene 11 (5) | ||
Series The series the publication or report is included in |
The Holocene | ||
Volume Volume number and part |
11 (5) | ||
Page Start/End The start and end page numbers. |
579 - 586 | ||
Biblio Note This is a Bibliographic record only. |
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Publication Type The type of publication - report, monograph, journal article or chapter from a book |
Journal | ||
Abstract The abstract describing the content of the publication or report |
To analyse the variation in 14C age within small peat samples, the 14C age of different mire plant remains and peat fractions (n = 39) from 2 cm thick peat slices was determined using accelerator mass spectrometry. The 14C ages of mosses were assumed to be the most accurate. To verify this the authors also tested the possibility that uncertainties could be introduced by mosses at the mire surface reassimilating CO2 produced during the decomposition of old peat. The average 14C content of living mosses (110.5--110.9 absolute modern% (pM)) did not differ between three Sphagnum species, representing hummock-, carpet- and lawn-growing species. Their 14C contents were also identical, within experimental limits, to the current 14C content of the atmosphere. Depending on sampled depth and peat type, the differences in calibrated 14C age between different fragments or fractions, within specific 2 cm thick peat samples, varied between 365 and ~1000 years, with one exceptional deviation of 2125 years in a sample from a mesotrophic sedge peat. Alkali-treated peat samples always gave greater ages than the corresponding untreated peat samples and small-size fractions (<0.045 mm), indicating that the fraction removed by standard alkali treatment is very similar to the small-size fraction. When compared to alkali-treated moss fragments, most other fractions and fragments deviated considerably. Even alkali-treated bulk samples deviated from the alkali-treated moss fragments. The authors propose that Sphagnum plant fragments should be used in 14C AMS dating of peat since they yield the most reliable 14C dates. | ||
Year of Publication The year the book, article or report was published |
2001 | ||
Locations Any locations covered by the publication or report. This is not the place the book or report was published. |
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Source Where the record has come from or which dataset it was orginally included in. |
BIAB
(The British & Irish Archaeological Bibliography (BIAB))
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Relations Other resources which are relevant to this publication or report |
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Created Date The date the record of the pubication was first entered |
31 Jul 2007 |
