Age determination of foraminifera shells
The causes for discordant radiocarbon results on multiple species of planktonic foraminifera from high-sedimentation-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 fi...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.834872 2023-05-15T18:00:53+02:00 Age determination of foraminifera shells Broecker, Wallace S Barker, Stephen Clark, Elizabeth Hajdas, Irka Bonani, Georges MEDIAN LATITUDE: 3.820139 * MEDIAN LONGITUDE: 35.636833 * SOUTH-BOUND LATITUDE: -2.177000 * WEST-BOUND LONGITUDE: -85.820000 * NORTH-BOUND LATITUDE: 18.933333 * EAST-BOUND LONGITUDE: 125.820000 * DATE/TIME START: 1967-10-14T00:00:00 * DATE/TIME END: 1983-03-24T00:00:00 2006-08-13 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.834872 https://doi.org/10.1594/PANGAEA.834872 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.834872 https://doi.org/10.1594/PANGAEA.834872 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Broecker, Wallace S; Barker, Stephen; Clark, Elizabeth; Hajdas, Irka; Bonani, Georges (2006): Anomalous radiocarbon ages for foraminifera shells. Paleoceanography, 21(2), PA2008, https://doi.org/10.1029/2005PA001212 Dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.834872 https://doi.org/10.1029/2005PA001212 2023-01-20T07:33:19Z The causes for discordant radiocarbon results on multiple species of planktonic foraminifera from high-sedimentation-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. Dataset Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-85.820000,125.820000,18.933333,-2.177000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
The causes for discordant radiocarbon results on multiple species of planktonic foraminifera from high-sedimentation-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. |
format |
Dataset |
author |
Broecker, Wallace S Barker, Stephen Clark, Elizabeth Hajdas, Irka Bonani, Georges |
spellingShingle |
Broecker, Wallace S Barker, Stephen Clark, Elizabeth Hajdas, Irka Bonani, Georges Age determination of foraminifera shells |
author_facet |
Broecker, Wallace S Barker, Stephen Clark, Elizabeth Hajdas, Irka Bonani, Georges |
author_sort |
Broecker, Wallace S |
title |
Age determination of foraminifera shells |
title_short |
Age determination of foraminifera shells |
title_full |
Age determination of foraminifera shells |
title_fullStr |
Age determination of foraminifera shells |
title_full_unstemmed |
Age determination of foraminifera shells |
title_sort |
age determination of foraminifera shells |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.834872 https://doi.org/10.1594/PANGAEA.834872 |
op_coverage |
MEDIAN LATITUDE: 3.820139 * MEDIAN LONGITUDE: 35.636833 * SOUTH-BOUND LATITUDE: -2.177000 * WEST-BOUND LONGITUDE: -85.820000 * NORTH-BOUND LATITUDE: 18.933333 * EAST-BOUND LONGITUDE: 125.820000 * DATE/TIME START: 1967-10-14T00:00:00 * DATE/TIME END: 1983-03-24T00:00:00 |
long_lat |
ENVELOPE(-85.820000,125.820000,18.933333,-2.177000) |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Supplement to: Broecker, Wallace S; Barker, Stephen; Clark, Elizabeth; Hajdas, Irka; Bonani, Georges (2006): Anomalous radiocarbon ages for foraminifera shells. Paleoceanography, 21(2), PA2008, https://doi.org/10.1029/2005PA001212 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.834872 https://doi.org/10.1594/PANGAEA.834872 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.834872 https://doi.org/10.1029/2005PA001212 |
_version_ |
1766170148781162496 |