Anomalous radiocarbon ages for foraminifera shells
[1] The causes for discordant radiocarbon results on multiple species of planktonic foraminifera from highsedimentation-rate marine sediments are investigated. We have documented two causes for these anomalous results. One is the addition of secondary radiocarbon for which we have, to date, only one...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1085.5006 2023-05-15T18:00:48+02:00 Anomalous radiocarbon ages for foraminifera shells W Broecker S Barker E Clark I Hajdas G Bonani The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1085.5006 http://orca.cf.ac.uk/15207/1/Broecker%202006.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1085.5006 http://orca.cf.ac.uk/15207/1/Broecker%202006.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://orca.cf.ac.uk/15207/1/Broecker%202006.pdf text 2006 ftciteseerx 2020-05-03T00:32:33Z [1] The causes for discordant radiocarbon results on multiple species of planktonic foraminifera from highsedimentation-rate marine sediments are investigated. We have documented two causes for these anomalous results. One is the addition of secondary radiocarbon for which we have, to date, only one firm example. It involves an opal-rich sediment. The other is the incorporation of reworked material. Again, we have, to date, only one firm example. It involves a rapidly deposited ocean margin sediment. However, we have three other examples where reworking is the most likely explanation. On the basis of this study it is our conclusion that, where precise radiocarbon dating of high-deposition-rate marine sediment is required, a prerequisite is to demonstrate that concordant ages can be obtained on pairs of fragile and robust planktic shells. For sediment rich in opal, it is advisable to check for secondary calcite by comparing ages obtained on acid-leached samples with those on unleached samples. Text Planktonic foraminifera Unknown |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
[1] The causes for discordant radiocarbon results on multiple species of planktonic foraminifera from highsedimentation-rate marine sediments are investigated. We have documented two causes for these anomalous results. One is the addition of secondary radiocarbon for which we have, to date, only one firm example. It involves an opal-rich sediment. The other is the incorporation of reworked material. Again, we have, to date, only one firm example. It involves a rapidly deposited ocean margin sediment. However, we have three other examples where reworking is the most likely explanation. On the basis of this study it is our conclusion that, where precise radiocarbon dating of high-deposition-rate marine sediment is required, a prerequisite is to demonstrate that concordant ages can be obtained on pairs of fragile and robust planktic shells. For sediment rich in opal, it is advisable to check for secondary calcite by comparing ages obtained on acid-leached samples with those on unleached samples. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
W Broecker S Barker E Clark I Hajdas G Bonani |
spellingShingle |
W Broecker S Barker E Clark I Hajdas G Bonani Anomalous radiocarbon ages for foraminifera shells |
author_facet |
W Broecker S Barker E Clark I Hajdas G Bonani |
author_sort |
W Broecker |
title |
Anomalous radiocarbon ages for foraminifera shells |
title_short |
Anomalous radiocarbon ages for foraminifera shells |
title_full |
Anomalous radiocarbon ages for foraminifera shells |
title_fullStr |
Anomalous radiocarbon ages for foraminifera shells |
title_full_unstemmed |
Anomalous radiocarbon ages for foraminifera shells |
title_sort |
anomalous radiocarbon ages for foraminifera shells |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1085.5006 http://orca.cf.ac.uk/15207/1/Broecker%202006.pdf |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
http://orca.cf.ac.uk/15207/1/Broecker%202006.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1085.5006 http://orca.cf.ac.uk/15207/1/Broecker%202006.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766170039136813056 |