Thermoluminescence properties and age estimates for Quaternary raised marine sediments, Hudson Bay Lowland, Canada
Thermoluminescence (TL) analyses of Quaternary nearshore marine sediments from the Hudson Bay Lowland revealed relatively high light emissions and linear growth curves to at least 400 Gy above the natural dose. Initial results indicate that anomalous fading may be circumvented by a preheating at 150...
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Canadian Science Publishing
1987
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crcansciencepubl:10.1139/e87-226 2023-12-17T10:31:23+01:00 Thermoluminescence properties and age estimates for Quaternary raised marine sediments, Hudson Bay Lowland, Canada Forman, S. L. Wintle, A. G. Thorleifson, L. H. Wyatt, P. H. 1987 http://dx.doi.org/10.1139/e87-226 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-226 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 24, issue 12, page 2405-2411 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1987 crcansciencepubl https://doi.org/10.1139/e87-226 2023-11-19T13:39:34Z Thermoluminescence (TL) analyses of Quaternary nearshore marine sediments from the Hudson Bay Lowland revealed relatively high light emissions and linear growth curves to at least 400 Gy above the natural dose. Initial results indicate that anomalous fading may be circumvented by a preheating at 150 °C for 16 h without substantial thermal draining of stable TL components. Both the total bleach method with unfiltered sunlamp light and the partial bleach method with light blocked below 400 nm resulted in overbleaching and thus overestimates of age. A TL age estimate of 5.3 ± 0.8 ka on the Holocene control sample, similar to the radiocarbon age, was obtained using the partial bleach method with light blocked below 540 nm. This same method yielded an average TL age estimate of 73 ± 10 ka for a Pleistocene unit, which corresponds to the amino-acid-based age estimate of ca. 76 ka. The agreement of the two age estimates is encouraging, since both methods rely on separate assumptions that have not been independently verified. Article in Journal/Newspaper Hudson Bay Canadian Science Publishing (via Crossref) Hudson Bay Canada Hudson Canadian Journal of Earth Sciences 24 12 2405 2411 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Forman, S. L. Wintle, A. G. Thorleifson, L. H. Wyatt, P. H. Thermoluminescence properties and age estimates for Quaternary raised marine sediments, Hudson Bay Lowland, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
Thermoluminescence (TL) analyses of Quaternary nearshore marine sediments from the Hudson Bay Lowland revealed relatively high light emissions and linear growth curves to at least 400 Gy above the natural dose. Initial results indicate that anomalous fading may be circumvented by a preheating at 150 °C for 16 h without substantial thermal draining of stable TL components. Both the total bleach method with unfiltered sunlamp light and the partial bleach method with light blocked below 400 nm resulted in overbleaching and thus overestimates of age. A TL age estimate of 5.3 ± 0.8 ka on the Holocene control sample, similar to the radiocarbon age, was obtained using the partial bleach method with light blocked below 540 nm. This same method yielded an average TL age estimate of 73 ± 10 ka for a Pleistocene unit, which corresponds to the amino-acid-based age estimate of ca. 76 ka. The agreement of the two age estimates is encouraging, since both methods rely on separate assumptions that have not been independently verified. |
format |
Article in Journal/Newspaper |
author |
Forman, S. L. Wintle, A. G. Thorleifson, L. H. Wyatt, P. H. |
author_facet |
Forman, S. L. Wintle, A. G. Thorleifson, L. H. Wyatt, P. H. |
author_sort |
Forman, S. L. |
title |
Thermoluminescence properties and age estimates for Quaternary raised marine sediments, Hudson Bay Lowland, Canada |
title_short |
Thermoluminescence properties and age estimates for Quaternary raised marine sediments, Hudson Bay Lowland, Canada |
title_full |
Thermoluminescence properties and age estimates for Quaternary raised marine sediments, Hudson Bay Lowland, Canada |
title_fullStr |
Thermoluminescence properties and age estimates for Quaternary raised marine sediments, Hudson Bay Lowland, Canada |
title_full_unstemmed |
Thermoluminescence properties and age estimates for Quaternary raised marine sediments, Hudson Bay Lowland, Canada |
title_sort |
thermoluminescence properties and age estimates for quaternary raised marine sediments, hudson bay lowland, canada |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/e87-226 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-226 |
geographic |
Hudson Bay Canada Hudson |
geographic_facet |
Hudson Bay Canada Hudson |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_source |
Canadian Journal of Earth Sciences volume 24, issue 12, page 2405-2411 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e87-226 |
container_title |
Canadian Journal of Earth Sciences |
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24 |
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12 |
container_start_page |
2405 |
op_container_end_page |
2411 |
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1785584672639549440 |