Sediment composition in NE Greenland Fjords, Shelf, and Slope, supplement to: Andrews, John T; Stein, Ruediger; Moros, Matthias; Perner, Kerstin (2016): Late Quaternary changes in sediment composition on the NE Greenland margin (~73° N) with a focus on the fjords and shelf. Boreas
In order to document changes in Holocene glacier extent and activity in NE Greenland (~73° N) we study marine sediment records that extend from the fjords (PS2631 and PS2640), across the shelf (PS2623 and PS2641), to the Greenland Sea (JM07-174GC). The primary bedrock geology of the source areas is...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
2016
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.848769 https://doi.pangaea.de/10.1594/PANGAEA.848769 |
id |
ftdatacite:10.1594/pangaea.848769 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.848769 2023-05-15T15:14:20+02:00 Sediment composition in NE Greenland Fjords, Shelf, and Slope, supplement to: Andrews, John T; Stein, Ruediger; Moros, Matthias; Perner, Kerstin (2016): Late Quaternary changes in sediment composition on the NE Greenland margin (~73° N) with a focus on the fjords and shelf. Boreas Andrews, John T Stein, Ruediger Moros, Matthias Perner, Kerstin 2016 application/zip https://dx.doi.org/10.1594/pangaea.848769 https://doi.pangaea.de/10.1594/PANGAEA.848769 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1111/bor.12169 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY article Supplementary Collection of Datasets Collection 2016 ftdatacite https://doi.org/10.1594/pangaea.848769 https://doi.org/10.1111/bor.12169 2022-02-09T13:38:16Z In order to document changes in Holocene glacier extent and activity in NE Greenland (~73° N) we study marine sediment records that extend from the fjords (PS2631 and PS2640), across the shelf (PS2623 and PS2641), to the Greenland Sea (JM07-174GC). The primary bedrock geology of the source areas is the Caledonian sediment outcrop, including Devonian red beds, plus early Neoproterozoic gneisses and early Tertiary volcanics. We examine the variations in colour (CIE*), grain size, and bulk mineralogy (from X-ray diffraction of the <2 mm sediment fraction). Fjord core PS2640 in Sofia Sund, with a marked red hue, is distinct in grain size, colour and mineralogy from the other fjord and shelf cores. Five distinct grain-size modes are distinguished of which only one is associated with a coarse ice-rafting signal - this mode is rare in the mid- and late Holocene. A sediment unmixing program (SedUnMixMC) is used to characterize down-core changes in sediment composition based on the upper late Holocene sediments from cores PS2640 (Sofia Sund), PS2631 (Kaiser Franz Joseph Fjord) and PS2623 (south of Shannon Is), and surface samples from the Kara Sea (as an indicator of transport from the Russian Arctic shelves). Major changes in mineral composition are noted in all cores with possible coeval shifts centred c. 2.5, 4.5 and 7.5 cal. ka BP (±0.5 ka) but are rarely linked with changes in the grain-size spectra. Coarse IRD (>2 mm) and IRD-grain-size spectra are rare in the last 9-10 cal. ka BP and, in contrast with areas farther south (~68° N), there is no distinct IRD signal at the onset of neoglaciation. Our paper demonstrates the importance of the quantitative analysis of sediment properties in clarifying source to sink changes in glacial marine environments. Article in Journal/Newspaper Arctic glacier Greenland Greenland Sea Kara Sea Shannon DataCite Metadata Store (German National Library of Science and Technology) Arctic Kara Sea Greenland Sund ENVELOPE(13.644,13.644,66.207,66.207) Boreas ENVELOPE(-3.933,-3.933,-71.300,-71.300) Sofia Sund ENVELOPE(-23.937,-23.937,73.029,73.029) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
In order to document changes in Holocene glacier extent and activity in NE Greenland (~73° N) we study marine sediment records that extend from the fjords (PS2631 and PS2640), across the shelf (PS2623 and PS2641), to the Greenland Sea (JM07-174GC). The primary bedrock geology of the source areas is the Caledonian sediment outcrop, including Devonian red beds, plus early Neoproterozoic gneisses and early Tertiary volcanics. We examine the variations in colour (CIE*), grain size, and bulk mineralogy (from X-ray diffraction of the <2 mm sediment fraction). Fjord core PS2640 in Sofia Sund, with a marked red hue, is distinct in grain size, colour and mineralogy from the other fjord and shelf cores. Five distinct grain-size modes are distinguished of which only one is associated with a coarse ice-rafting signal - this mode is rare in the mid- and late Holocene. A sediment unmixing program (SedUnMixMC) is used to characterize down-core changes in sediment composition based on the upper late Holocene sediments from cores PS2640 (Sofia Sund), PS2631 (Kaiser Franz Joseph Fjord) and PS2623 (south of Shannon Is), and surface samples from the Kara Sea (as an indicator of transport from the Russian Arctic shelves). Major changes in mineral composition are noted in all cores with possible coeval shifts centred c. 2.5, 4.5 and 7.5 cal. ka BP (±0.5 ka) but are rarely linked with changes in the grain-size spectra. Coarse IRD (>2 mm) and IRD-grain-size spectra are rare in the last 9-10 cal. ka BP and, in contrast with areas farther south (~68° N), there is no distinct IRD signal at the onset of neoglaciation. Our paper demonstrates the importance of the quantitative analysis of sediment properties in clarifying source to sink changes in glacial marine environments. |
format |
Article in Journal/Newspaper |
author |
Andrews, John T Stein, Ruediger Moros, Matthias Perner, Kerstin |
spellingShingle |
Andrews, John T Stein, Ruediger Moros, Matthias Perner, Kerstin Sediment composition in NE Greenland Fjords, Shelf, and Slope, supplement to: Andrews, John T; Stein, Ruediger; Moros, Matthias; Perner, Kerstin (2016): Late Quaternary changes in sediment composition on the NE Greenland margin (~73° N) with a focus on the fjords and shelf. Boreas |
author_facet |
Andrews, John T Stein, Ruediger Moros, Matthias Perner, Kerstin |
author_sort |
Andrews, John T |
title |
Sediment composition in NE Greenland Fjords, Shelf, and Slope, supplement to: Andrews, John T; Stein, Ruediger; Moros, Matthias; Perner, Kerstin (2016): Late Quaternary changes in sediment composition on the NE Greenland margin (~73° N) with a focus on the fjords and shelf. Boreas |
title_short |
Sediment composition in NE Greenland Fjords, Shelf, and Slope, supplement to: Andrews, John T; Stein, Ruediger; Moros, Matthias; Perner, Kerstin (2016): Late Quaternary changes in sediment composition on the NE Greenland margin (~73° N) with a focus on the fjords and shelf. Boreas |
title_full |
Sediment composition in NE Greenland Fjords, Shelf, and Slope, supplement to: Andrews, John T; Stein, Ruediger; Moros, Matthias; Perner, Kerstin (2016): Late Quaternary changes in sediment composition on the NE Greenland margin (~73° N) with a focus on the fjords and shelf. Boreas |
title_fullStr |
Sediment composition in NE Greenland Fjords, Shelf, and Slope, supplement to: Andrews, John T; Stein, Ruediger; Moros, Matthias; Perner, Kerstin (2016): Late Quaternary changes in sediment composition on the NE Greenland margin (~73° N) with a focus on the fjords and shelf. Boreas |
title_full_unstemmed |
Sediment composition in NE Greenland Fjords, Shelf, and Slope, supplement to: Andrews, John T; Stein, Ruediger; Moros, Matthias; Perner, Kerstin (2016): Late Quaternary changes in sediment composition on the NE Greenland margin (~73° N) with a focus on the fjords and shelf. Boreas |
title_sort |
sediment composition in ne greenland fjords, shelf, and slope, supplement to: andrews, john t; stein, ruediger; moros, matthias; perner, kerstin (2016): late quaternary changes in sediment composition on the ne greenland margin (~73° n) with a focus on the fjords and shelf. boreas |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2016 |
url |
https://dx.doi.org/10.1594/pangaea.848769 https://doi.pangaea.de/10.1594/PANGAEA.848769 |
long_lat |
ENVELOPE(13.644,13.644,66.207,66.207) ENVELOPE(-3.933,-3.933,-71.300,-71.300) ENVELOPE(-23.937,-23.937,73.029,73.029) |
geographic |
Arctic Kara Sea Greenland Sund Boreas Sofia Sund |
geographic_facet |
Arctic Kara Sea Greenland Sund Boreas Sofia Sund |
genre |
Arctic glacier Greenland Greenland Sea Kara Sea Shannon |
genre_facet |
Arctic glacier Greenland Greenland Sea Kara Sea Shannon |
op_relation |
https://dx.doi.org/10.1111/bor.12169 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.848769 https://doi.org/10.1111/bor.12169 |
_version_ |
1766344799397347328 |