Biomarker in Heinrich event layers
There are controversies regarding the origin of Heinrich layer 3 (H3), the massive ice-rafting and meltwater event in the North Atlantic during the last glacial cycle spanning a time window between 29 and 30 kyr B.P. Some argue in favor of a Laurentide Ice Sheet source similar to other Heinrich laye...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.833897 2023-05-15T16:35:31+02:00 Biomarker in Heinrich event layers Rashid, Harunur Grosjean, Emmanuelle MEDIAN LATITUDE: 50.807667 * MEDIAN LONGITUDE: -47.520333 * SOUTH-BOUND LATITUDE: 43.240000 * WEST-BOUND LONGITUDE: -56.460000 * NORTH-BOUND LATITUDE: 58.240000 * EAST-BOUND LONGITUDE: -32.580000 2006-07-09 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.833897 https://doi.org/10.1594/PANGAEA.833897 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.833897 https://doi.org/10.1594/PANGAEA.833897 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Rashid, Harunur; Grosjean, Emmanuelle (2006): Detecting the source of Heinrich layers: An organic geochemical study. Paleoceanography, 21(3), PA3014, https://doi.org/10.1029/2005PA001240 Dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.833897 https://doi.org/10.1029/2005PA001240 2023-01-20T07:33:18Z There are controversies regarding the origin of Heinrich layer 3 (H3), the massive ice-rafting and meltwater event in the North Atlantic during the last glacial cycle spanning a time window between 29 and 30 kyr B.P. Some argue in favor of a Laurentide Ice Sheet source similar to other Heinrich layers, while a contending view argues for the European ice sheet source. Existing geochemical proxies such as 40Ar/39Ar, 206Pb/204Pb, or epsilon-Nd, etc., could not be used to distinguish among various sources of ice-rafted debris in H3 because of their low abundances, suggesting a background glacial sediment signal. In order to circumvent this problem a biomarker-based approach is used to characterize the provenance of H layers 2, 3, and 4 and other non-Heinrich layers. The presence of hopanes and steranes and their aromatic counterparts in the H layers is incompatible with Recent sediments and is attributed to the transportation of organic matter because of the glacial erosion of source rocks. The most diagnostic and useful signatures of this ancient organic matter in the H layers are the dominance of C34 hopanoids over C33 and the occurrence of isorenieratane along with palaerenieratane. Biomarkers signatures in H layers 2 and 3 of the Labrador Sea suggest no difference in their source. Hydrocarbon distributions suggest that these sediments were derived from the Middle to Late Ordovician and Silurian source rocks of the Hudson Bay of eastern Canada. Biomarker data of the H layer 4 from the northwest Atlantic reveal that the sediments of this layer have a similar source to the H layers in the Labrador Sea. Dataset Hudson Bay Ice Sheet Labrador Sea North Atlantic Northwest Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Canada Hudson Hudson Bay ENVELOPE(-56.460000,-32.580000,58.240000,43.240000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
There are controversies regarding the origin of Heinrich layer 3 (H3), the massive ice-rafting and meltwater event in the North Atlantic during the last glacial cycle spanning a time window between 29 and 30 kyr B.P. Some argue in favor of a Laurentide Ice Sheet source similar to other Heinrich layers, while a contending view argues for the European ice sheet source. Existing geochemical proxies such as 40Ar/39Ar, 206Pb/204Pb, or epsilon-Nd, etc., could not be used to distinguish among various sources of ice-rafted debris in H3 because of their low abundances, suggesting a background glacial sediment signal. In order to circumvent this problem a biomarker-based approach is used to characterize the provenance of H layers 2, 3, and 4 and other non-Heinrich layers. The presence of hopanes and steranes and their aromatic counterparts in the H layers is incompatible with Recent sediments and is attributed to the transportation of organic matter because of the glacial erosion of source rocks. The most diagnostic and useful signatures of this ancient organic matter in the H layers are the dominance of C34 hopanoids over C33 and the occurrence of isorenieratane along with palaerenieratane. Biomarkers signatures in H layers 2 and 3 of the Labrador Sea suggest no difference in their source. Hydrocarbon distributions suggest that these sediments were derived from the Middle to Late Ordovician and Silurian source rocks of the Hudson Bay of eastern Canada. Biomarker data of the H layer 4 from the northwest Atlantic reveal that the sediments of this layer have a similar source to the H layers in the Labrador Sea. |
format |
Dataset |
author |
Rashid, Harunur Grosjean, Emmanuelle |
spellingShingle |
Rashid, Harunur Grosjean, Emmanuelle Biomarker in Heinrich event layers |
author_facet |
Rashid, Harunur Grosjean, Emmanuelle |
author_sort |
Rashid, Harunur |
title |
Biomarker in Heinrich event layers |
title_short |
Biomarker in Heinrich event layers |
title_full |
Biomarker in Heinrich event layers |
title_fullStr |
Biomarker in Heinrich event layers |
title_full_unstemmed |
Biomarker in Heinrich event layers |
title_sort |
biomarker in heinrich event layers |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.833897 https://doi.org/10.1594/PANGAEA.833897 |
op_coverage |
MEDIAN LATITUDE: 50.807667 * MEDIAN LONGITUDE: -47.520333 * SOUTH-BOUND LATITUDE: 43.240000 * WEST-BOUND LONGITUDE: -56.460000 * NORTH-BOUND LATITUDE: 58.240000 * EAST-BOUND LONGITUDE: -32.580000 |
long_lat |
ENVELOPE(-56.460000,-32.580000,58.240000,43.240000) |
geographic |
Canada Hudson Hudson Bay |
geographic_facet |
Canada Hudson Hudson Bay |
genre |
Hudson Bay Ice Sheet Labrador Sea North Atlantic Northwest Atlantic |
genre_facet |
Hudson Bay Ice Sheet Labrador Sea North Atlantic Northwest Atlantic |
op_source |
Supplement to: Rashid, Harunur; Grosjean, Emmanuelle (2006): Detecting the source of Heinrich layers: An organic geochemical study. Paleoceanography, 21(3), PA3014, https://doi.org/10.1029/2005PA001240 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.833897 https://doi.org/10.1594/PANGAEA.833897 |
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.833897 https://doi.org/10.1029/2005PA001240 |
_version_ |
1766025744496984064 |