Optically Stimulated Luminescence ( OSL) dating of sand‐filled wedge structures and their fine‐grained host sediment from Jonzac, SW France
Two sand wedge structures and their host sediments, from J onzac in SW F rance, were successfully dated using Optically Stimulated Luminescence ( OSL ) measurements on both small aliquots and single grains of quartz from the 180–212 μm size fraction. One of the sand wedges clearly contains primary i...
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crwiley:10.1111/j.1502-3885.2012.00270.x 2024-06-02T08:13:07+00:00 Optically Stimulated Luminescence ( OSL) dating of sand‐filled wedge structures and their fine‐grained host sediment from Jonzac, SW France Guhl, Anja Bertran, Pascal Zielhofer, Christoph Fitzsimmons, Kathryn E. 2012 http://dx.doi.org/10.1111/j.1502-3885.2012.00270.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2012.00270.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2012.00270.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 42, issue 2, page 317-332 ISSN 0300-9483 1502-3885 journal-article 2012 crwiley https://doi.org/10.1111/j.1502-3885.2012.00270.x 2024-05-03T11:29:24Z Two sand wedge structures and their host sediments, from J onzac in SW F rance, were successfully dated using Optically Stimulated Luminescence ( OSL ) measurements on both small aliquots and single grains of quartz from the 180–212 μm size fraction. One of the sand wedges clearly contains primary infilling. However, grain‐size analysis and field observations do not clearly indicate whether the other feature represents a primary sand wedge or a composite sand wedge with primary and secondary infilling. OSL results and the geological setting justify using the C entral A ge M odel ( CAM ) for the calculation of age estimates. Grain‐size analysis and detailed investigations of OSL results revealed the contamination of one sand wedge sample with host sediment. However, age calculation using the F inite M ixture M odel ( FMM ) provided what is considered to be a reliable age estimate for the contaminated sample. The age estimates for all samples correspond to Marine Isotope Stage ( MIS ) 3. While fine‐grained sediments were deposited in the middle of MIS 3 ( c . 43–55 ka), the sand wedges unexpectedly correspond to the end of this period ( c . 33 ka) or the onset of MIS 2 ( c . 27 ka). The sand wedges were probably formed during intense but short cold periods, possibly correlated with a Heinrich event ( H2 and/or H3 ). The results help us to assess how effective luminescence dating is on sand wedges and the limitations involved in correlating sand wedge ages with H einrich events, and contribute to the debate on the timing of cryogenic formation processes and the permafrost distribution in SW F rance. Article in Journal/Newspaper permafrost wedge* Wiley Online Library Boreas 42 2 317 332 |
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Wiley Online Library |
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English |
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Two sand wedge structures and their host sediments, from J onzac in SW F rance, were successfully dated using Optically Stimulated Luminescence ( OSL ) measurements on both small aliquots and single grains of quartz from the 180–212 μm size fraction. One of the sand wedges clearly contains primary infilling. However, grain‐size analysis and field observations do not clearly indicate whether the other feature represents a primary sand wedge or a composite sand wedge with primary and secondary infilling. OSL results and the geological setting justify using the C entral A ge M odel ( CAM ) for the calculation of age estimates. Grain‐size analysis and detailed investigations of OSL results revealed the contamination of one sand wedge sample with host sediment. However, age calculation using the F inite M ixture M odel ( FMM ) provided what is considered to be a reliable age estimate for the contaminated sample. The age estimates for all samples correspond to Marine Isotope Stage ( MIS ) 3. While fine‐grained sediments were deposited in the middle of MIS 3 ( c . 43–55 ka), the sand wedges unexpectedly correspond to the end of this period ( c . 33 ka) or the onset of MIS 2 ( c . 27 ka). The sand wedges were probably formed during intense but short cold periods, possibly correlated with a Heinrich event ( H2 and/or H3 ). The results help us to assess how effective luminescence dating is on sand wedges and the limitations involved in correlating sand wedge ages with H einrich events, and contribute to the debate on the timing of cryogenic formation processes and the permafrost distribution in SW F rance. |
format |
Article in Journal/Newspaper |
author |
Guhl, Anja Bertran, Pascal Zielhofer, Christoph Fitzsimmons, Kathryn E. |
spellingShingle |
Guhl, Anja Bertran, Pascal Zielhofer, Christoph Fitzsimmons, Kathryn E. Optically Stimulated Luminescence ( OSL) dating of sand‐filled wedge structures and their fine‐grained host sediment from Jonzac, SW France |
author_facet |
Guhl, Anja Bertran, Pascal Zielhofer, Christoph Fitzsimmons, Kathryn E. |
author_sort |
Guhl, Anja |
title |
Optically Stimulated Luminescence ( OSL) dating of sand‐filled wedge structures and their fine‐grained host sediment from Jonzac, SW France |
title_short |
Optically Stimulated Luminescence ( OSL) dating of sand‐filled wedge structures and their fine‐grained host sediment from Jonzac, SW France |
title_full |
Optically Stimulated Luminescence ( OSL) dating of sand‐filled wedge structures and their fine‐grained host sediment from Jonzac, SW France |
title_fullStr |
Optically Stimulated Luminescence ( OSL) dating of sand‐filled wedge structures and their fine‐grained host sediment from Jonzac, SW France |
title_full_unstemmed |
Optically Stimulated Luminescence ( OSL) dating of sand‐filled wedge structures and their fine‐grained host sediment from Jonzac, SW France |
title_sort |
optically stimulated luminescence ( osl) dating of sand‐filled wedge structures and their fine‐grained host sediment from jonzac, sw france |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1502-3885.2012.00270.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2012.00270.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2012.00270.x |
genre |
permafrost wedge* |
genre_facet |
permafrost wedge* |
op_source |
Boreas volume 42, issue 2, page 317-332 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.2012.00270.x |
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Boreas |
container_volume |
42 |
container_issue |
2 |
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317 |
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332 |
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1800759786904485888 |