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Holocene Chronology of the Brattforsheden Delta and Inland Dune Field, SW Sweden

Alexanderson, Helena LU and Fabel, Derek (2015) In Geochronometria 42(1). p.1-16
Abstract
Brattforsheden is a large glacifluvial deposit in southwestern Sweden and associated with it is one of Sweden's largest inland dune fields. Although the relative ages of the Brattforsheden deposits are well known, absolute ages from the area are few. In this study we have used optically stimulated luminescence (OSL), surface exposure (Be-10) and radiocarbon (C-14) dating to provide an absolute chronology for the deglaciation and for the Holocene development of the aeolian dunes. Our data show that the deglaciation took place just before 11 ka (11.5 +/- 0.6 ka OSL, 11.3 +/- 0.8 ka Be-10), in line with the C-14-based regional deglaciation age. Aeolian dunes started forming immediately after deglaciation and were active for at least 2000... (More)
Brattforsheden is a large glacifluvial deposit in southwestern Sweden and associated with it is one of Sweden's largest inland dune fields. Although the relative ages of the Brattforsheden deposits are well known, absolute ages from the area are few. In this study we have used optically stimulated luminescence (OSL), surface exposure (Be-10) and radiocarbon (C-14) dating to provide an absolute chronology for the deglaciation and for the Holocene development of the aeolian dunes. Our data show that the deglaciation took place just before 11 ka (11.5 +/- 0.6 ka OSL, 11.3 +/- 0.8 ka Be-10), in line with the C-14-based regional deglaciation age. Aeolian dunes started forming immediately after deglaciation and were active for at least 2000 years, well after vegetation had established. Renewed aeolian activity occurred 270-180 years ago, resulting in the deposition of sand sheets. Comparison between dating methods and studies of OSL dose distributions show that glacial, glacifluvial and littoral sediments suffer from incomplete bleaching and thus that mean OSL ages from such deposits overestimate the true depositional age. By using small aliquots and statistical age models, this effect can partly be countered. Also, some of the Be-10 ages appear too old, which may be due to previous exposure. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
luminescence (OSL) dating, surface exposure dating (Be-10), deglaciation, aeolian, Holocene, Sweden
in
Geochronometria
volume
42
issue
1
pages
1 - 16
publisher
WIND-J WOJEWODA PUBLISHING CO.
external identifiers
  • wos:000355584200001
  • scopus:84946918240
ISSN
1897-1695
DOI
10.1515/geochr-2015-0001
language
English
LU publication?
yes
id
abab4a57-d743-4be4-bf4f-b9d3c95061fb (old id 7613688)
date added to LUP
2015-07-21 13:23:17
date last changed
2017-01-01 03:26:27
@article{abab4a57-d743-4be4-bf4f-b9d3c95061fb,
  abstract     = {Brattforsheden is a large glacifluvial deposit in southwestern Sweden and associated with it is one of Sweden's largest inland dune fields. Although the relative ages of the Brattforsheden deposits are well known, absolute ages from the area are few. In this study we have used optically stimulated luminescence (OSL), surface exposure (Be-10) and radiocarbon (C-14) dating to provide an absolute chronology for the deglaciation and for the Holocene development of the aeolian dunes. Our data show that the deglaciation took place just before 11 ka (11.5 +/- 0.6 ka OSL, 11.3 +/- 0.8 ka Be-10), in line with the C-14-based regional deglaciation age. Aeolian dunes started forming immediately after deglaciation and were active for at least 2000 years, well after vegetation had established. Renewed aeolian activity occurred 270-180 years ago, resulting in the deposition of sand sheets. Comparison between dating methods and studies of OSL dose distributions show that glacial, glacifluvial and littoral sediments suffer from incomplete bleaching and thus that mean OSL ages from such deposits overestimate the true depositional age. By using small aliquots and statistical age models, this effect can partly be countered. Also, some of the Be-10 ages appear too old, which may be due to previous exposure.},
  author       = {Alexanderson, Helena and Fabel, Derek},
  issn         = {1897-1695},
  keyword      = {luminescence (OSL) dating,surface exposure dating (Be-10),deglaciation,aeolian,Holocene,Sweden},
  language     = {eng},
  number       = {1},
  pages        = {1--16},
  publisher    = {WIND-J WOJEWODA PUBLISHING CO.},
  series       = {Geochronometria},
  title        = {Holocene Chronology of the Brattforsheden Delta and Inland Dune Field, SW Sweden},
  url          = {http://dx.doi.org/10.1515/geochr-2015-0001},
  volume       = {42},
  year         = {2015},
}