Sources of Labrador Sea sediments since the last glacial maximum inferred from Nd-Pb isotopes
Pb isotopes have been measured in the clay-size fraction of Late Glacial and Holocene deep-sea sediments recovered from two Labrador Sea piston cores that have been previously analyzed for Nd isotopes. The newly acquired Pb isotopic data allow us to better constrain the different source areas that s...
Published in: | Geochimica et Cosmochimica Acta |
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ftvliz:oai:oma.vliz.be:210920 2023-05-15T16:00:40+02:00 Sources of Labrador Sea sediments since the last glacial maximum inferred from Nd-Pb isotopes Fagel, N. Innocent, C. Gariepy, C. Hillaire-Marcel, C. 2002 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=210920 en eng info:eu-repo/semantics/altIdentifier/wos/000176860200009 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/S0016-7037(02)00866-9 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=210920 info:eu-repo/semantics/restrictedAccess %3Ci%3EGeochim.+Cosmochim.+Acta+66%2814%29%3C%2Fi%3E%3A+2569-2581.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2FS0016-7037%2802%2900866-9%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2FS0016-7037%2802%2900866-9%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2002 ftvliz https://doi.org/10.1016/S0016-7037(02)00866-9 2022-05-01T09:38:11Z Pb isotopes have been measured in the clay-size fraction of Late Glacial and Holocene deep-sea sediments recovered from two Labrador Sea piston cores that have been previously analyzed for Nd isotopes. The newly acquired Pb isotopic data allow us to better constrain the different source areas that supplied clay-size material during the last deglaciation, until 8.6 kyr (calendar ages). Nd-Pb data can be modeled mainly as a mixture between a Precambrian crust and Lower Palcozoic material originating from the denudation of the pan-African orogen. The old material originates mainly from the Archean, Lower Proterozoic, or both terranes of Greenland (and also probably corresponding terranes of Labrador), although minor input of other Precambrian material is recorded in some detrital carbonate-rich deglacial samples from Orphan Knoll. The Phanerozoic crustal end member consists of sediment material mainly originating from northwestern Europe. This source area is found to be the only significant source of young crustal material in early Holocene sediments from the Greenland Rise. No significant input from the mid-Atlantic volcanism is apparent. This study puts further constraints on the deep circulation pattern during the last deglaciation. It is concluded that at that time, European Phanerozoic material was carried from the Norwegian Sea through the Wyville Thompson Ridge into the Iceland Basin by the North East Atlantic Deep Water. No evidence for an overflow is found either south of the Iceland (Iceland-Scotland Ridge) or through the Denmark Strait. Article in Journal/Newspaper Denmark Strait Greenland Iceland Labrador Sea North East Atlantic Norwegian Sea Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Norwegian Sea Greenland Orphan Knoll ENVELOPE(-46.500,-46.500,50.500,50.500) Knoll The ENVELOPE(169.350,169.350,-77.517,-77.517) Thompson Ridge ENVELOPE(-146.083,-146.083,-76.450,-76.450) Geochimica et Cosmochimica Acta 66 14 2569 2581 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
Pb isotopes have been measured in the clay-size fraction of Late Glacial and Holocene deep-sea sediments recovered from two Labrador Sea piston cores that have been previously analyzed for Nd isotopes. The newly acquired Pb isotopic data allow us to better constrain the different source areas that supplied clay-size material during the last deglaciation, until 8.6 kyr (calendar ages). Nd-Pb data can be modeled mainly as a mixture between a Precambrian crust and Lower Palcozoic material originating from the denudation of the pan-African orogen. The old material originates mainly from the Archean, Lower Proterozoic, or both terranes of Greenland (and also probably corresponding terranes of Labrador), although minor input of other Precambrian material is recorded in some detrital carbonate-rich deglacial samples from Orphan Knoll. The Phanerozoic crustal end member consists of sediment material mainly originating from northwestern Europe. This source area is found to be the only significant source of young crustal material in early Holocene sediments from the Greenland Rise. No significant input from the mid-Atlantic volcanism is apparent. This study puts further constraints on the deep circulation pattern during the last deglaciation. It is concluded that at that time, European Phanerozoic material was carried from the Norwegian Sea through the Wyville Thompson Ridge into the Iceland Basin by the North East Atlantic Deep Water. No evidence for an overflow is found either south of the Iceland (Iceland-Scotland Ridge) or through the Denmark Strait. |
format |
Article in Journal/Newspaper |
author |
Fagel, N. Innocent, C. Gariepy, C. Hillaire-Marcel, C. |
spellingShingle |
Fagel, N. Innocent, C. Gariepy, C. Hillaire-Marcel, C. Sources of Labrador Sea sediments since the last glacial maximum inferred from Nd-Pb isotopes |
author_facet |
Fagel, N. Innocent, C. Gariepy, C. Hillaire-Marcel, C. |
author_sort |
Fagel, N. |
title |
Sources of Labrador Sea sediments since the last glacial maximum inferred from Nd-Pb isotopes |
title_short |
Sources of Labrador Sea sediments since the last glacial maximum inferred from Nd-Pb isotopes |
title_full |
Sources of Labrador Sea sediments since the last glacial maximum inferred from Nd-Pb isotopes |
title_fullStr |
Sources of Labrador Sea sediments since the last glacial maximum inferred from Nd-Pb isotopes |
title_full_unstemmed |
Sources of Labrador Sea sediments since the last glacial maximum inferred from Nd-Pb isotopes |
title_sort |
sources of labrador sea sediments since the last glacial maximum inferred from nd-pb isotopes |
publishDate |
2002 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=210920 |
long_lat |
ENVELOPE(-46.500,-46.500,50.500,50.500) ENVELOPE(169.350,169.350,-77.517,-77.517) ENVELOPE(-146.083,-146.083,-76.450,-76.450) |
geographic |
Norwegian Sea Greenland Orphan Knoll Knoll The Thompson Ridge |
geographic_facet |
Norwegian Sea Greenland Orphan Knoll Knoll The Thompson Ridge |
genre |
Denmark Strait Greenland Iceland Labrador Sea North East Atlantic Norwegian Sea |
genre_facet |
Denmark Strait Greenland Iceland Labrador Sea North East Atlantic Norwegian Sea |
op_source |
%3Ci%3EGeochim.+Cosmochim.+Acta+66%2814%29%3C%2Fi%3E%3A+2569-2581.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2FS0016-7037%2802%2900866-9%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2FS0016-7037%2802%2900866-9%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000176860200009 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/S0016-7037(02)00866-9 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=210920 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/S0016-7037(02)00866-9 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
66 |
container_issue |
14 |
container_start_page |
2569 |
op_container_end_page |
2581 |
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1766396681448849408 |