Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events
A major effort of the geochemical and paleoclimate community has been to identify the specific sources of the ice-rafted debris (IRD) in Heinrich Layers (HLs). Although the general consensus is that the majority of the IRD originated from the Hudson area of northern Canada, the specific sources are...
Published in: | Geochimica et Cosmochimica Acta |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | https://hdl.handle.net/1983/60f5b109-a19c-4c87-8a20-993861565535 https://research-information.bris.ac.uk/en/publications/60f5b109-a19c-4c87-8a20-993861565535 https://doi.org/10.1016/j.gca.2017.02.008 https://research-information.bris.ac.uk/ws/files/103938801/Submitted_Manuscript.pdf https://research-information.bris.ac.uk/ws/files/106554471/mmc1.pdf |
id |
ftubristolcris:oai:research-information.bris.ac.uk:publications/60f5b109-a19c-4c87-8a20-993861565535 |
---|---|
record_format |
openpolar |
spelling |
ftubristolcris:oai:research-information.bris.ac.uk:publications/60f5b109-a19c-4c87-8a20-993861565535 2024-01-28T10:04:39+01:00 Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events Hefter, Jens Naafs, B. David A. Zhang, Shunxin 2017-05-15 application/pdf https://hdl.handle.net/1983/60f5b109-a19c-4c87-8a20-993861565535 https://research-information.bris.ac.uk/en/publications/60f5b109-a19c-4c87-8a20-993861565535 https://doi.org/10.1016/j.gca.2017.02.008 https://research-information.bris.ac.uk/ws/files/103938801/Submitted_Manuscript.pdf https://research-information.bris.ac.uk/ws/files/106554471/mmc1.pdf eng eng info:eu-repo/semantics/openAccess Hefter , J , Naafs , B D A & Zhang , S 2017 , ' Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events ' , Geochimica et Cosmochimica Acta , vol. 205 , pp. 211-225 . https://doi.org/10.1016/j.gca.2017.02.008 Heinrich Layer Biomarker Organic geochemistry Hudson Strait Ordovician source rock Paleozoic article 2017 ftubristolcris https://doi.org/10.1016/j.gca.2017.02.008 2024-01-04T23:51:55Z A major effort of the geochemical and paleoclimate community has been to identify the specific sources of the ice-rafted debris (IRD) in Heinrich Layers (HLs). Although the general consensus is that the majority of the IRD originated from the Hudson area of northern Canada, the specific sources are not well constrained. Here we compare the diagnostic organic geochemical signature of HLs to that of a number of Paleozoic outcrops across the former margin of the Laurentide ice sheet. We show that the biomarker signature of Upper Ordovician strata from Southampton and Baffin Island is compatible with that found in HLs in the Labrador Sea and North Atlantic, while the biomarker signature of other Paleozoic formations from the former margin of the Laurentide ice sheet is not. In addition to the biomarker signature, key-inorganic characteristics (δ18O, εNd, and 87Sr/86Sr ratios) of these formations from Southampton and Baffin Island are consistent with those reported from HLs. The location of these formations in and around the Hudson Strait is compatible with palaeo-ice flow regimes through the Hudson Strait, allowing for easy entrainment and rapid transport to the ocean. Based on these results we propose that these specific Upper Ordovician formations form a main source of IRD in HLs and hence infer an active role of the Hudson Strait paleo-ice flow in these events. Article in Journal/Newspaper Baffin Island Baffin Hudson Strait Ice Sheet Labrador Sea North Atlantic University of Bristol: Bristol Research Baffin Island Canada Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Geochimica et Cosmochimica Acta 205 211 225 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
Heinrich Layer Biomarker Organic geochemistry Hudson Strait Ordovician source rock Paleozoic |
spellingShingle |
Heinrich Layer Biomarker Organic geochemistry Hudson Strait Ordovician source rock Paleozoic Hefter, Jens Naafs, B. David A. Zhang, Shunxin Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events |
topic_facet |
Heinrich Layer Biomarker Organic geochemistry Hudson Strait Ordovician source rock Paleozoic |
description |
A major effort of the geochemical and paleoclimate community has been to identify the specific sources of the ice-rafted debris (IRD) in Heinrich Layers (HLs). Although the general consensus is that the majority of the IRD originated from the Hudson area of northern Canada, the specific sources are not well constrained. Here we compare the diagnostic organic geochemical signature of HLs to that of a number of Paleozoic outcrops across the former margin of the Laurentide ice sheet. We show that the biomarker signature of Upper Ordovician strata from Southampton and Baffin Island is compatible with that found in HLs in the Labrador Sea and North Atlantic, while the biomarker signature of other Paleozoic formations from the former margin of the Laurentide ice sheet is not. In addition to the biomarker signature, key-inorganic characteristics (δ18O, εNd, and 87Sr/86Sr ratios) of these formations from Southampton and Baffin Island are consistent with those reported from HLs. The location of these formations in and around the Hudson Strait is compatible with palaeo-ice flow regimes through the Hudson Strait, allowing for easy entrainment and rapid transport to the ocean. Based on these results we propose that these specific Upper Ordovician formations form a main source of IRD in HLs and hence infer an active role of the Hudson Strait paleo-ice flow in these events. |
format |
Article in Journal/Newspaper |
author |
Hefter, Jens Naafs, B. David A. Zhang, Shunxin |
author_facet |
Hefter, Jens Naafs, B. David A. Zhang, Shunxin |
author_sort |
Hefter, Jens |
title |
Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events |
title_short |
Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events |
title_full |
Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events |
title_fullStr |
Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events |
title_full_unstemmed |
Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events |
title_sort |
tracing the source of ancient reworked organic matter delivered to the north atlantic ocean during heinrich events |
publishDate |
2017 |
url |
https://hdl.handle.net/1983/60f5b109-a19c-4c87-8a20-993861565535 https://research-information.bris.ac.uk/en/publications/60f5b109-a19c-4c87-8a20-993861565535 https://doi.org/10.1016/j.gca.2017.02.008 https://research-information.bris.ac.uk/ws/files/103938801/Submitted_Manuscript.pdf https://research-information.bris.ac.uk/ws/files/106554471/mmc1.pdf |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) |
geographic |
Baffin Island Canada Hudson Hudson Strait |
geographic_facet |
Baffin Island Canada Hudson Hudson Strait |
genre |
Baffin Island Baffin Hudson Strait Ice Sheet Labrador Sea North Atlantic |
genre_facet |
Baffin Island Baffin Hudson Strait Ice Sheet Labrador Sea North Atlantic |
op_source |
Hefter , J , Naafs , B D A & Zhang , S 2017 , ' Tracing the source of ancient reworked organic matter delivered to the North Atlantic Ocean during Heinrich Events ' , Geochimica et Cosmochimica Acta , vol. 205 , pp. 211-225 . https://doi.org/10.1016/j.gca.2017.02.008 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.gca.2017.02.008 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
205 |
container_start_page |
211 |
op_container_end_page |
225 |
_version_ |
1789330421027176448 |