Local controls on sediment accumulation and distribution in a fjord in the West Antarctic Peninsula: implications for palaeoenvironmental interpretations
We analyse surface sediment and its distribution in Flandres Bay, West Antarctic Peninsula, in order to understand modern day sediment dispersal patterns in a fjord with retreating, tidewater glaciers. The surface sediment descriptions of 41 cores are included in this study. The sediment facies desc...
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Norwegian Polar Institute
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ftjpolarres:oai:journals.openacademia.net:article/3263 2024-09-09T19:09:31+00:00 Local controls on sediment accumulation and distribution in a fjord in the West Antarctic Peninsula: implications for palaeoenvironmental interpretations Munoz, Yuribia P. Wellner, Julia S. 2016-08-11 application/pdf text/html application/epub+zip application/xml https://polarresearch.net/index.php/polar/article/view/3263 https://doi.org/10.3402/polar.v35.25284 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3263/8662 https://polarresearch.net/index.php/polar/article/view/3263/8663 https://polarresearch.net/index.php/polar/article/view/3263/8664 https://polarresearch.net/index.php/polar/article/view/3263/8665 https://polarresearch.net/index.php/polar/article/view/3263/8670 https://polarresearch.net/index.php/polar/article/view/3263 doi:10.3402/polar.v35.25284 Polar Research; Vol 35 (2016) 1751-8369 Flandres Bay Antarctic Peninsula sediment distribution grain size info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 ftjpolarres https://doi.org/10.3402/polar.v35.25284 2024-06-20T23:33:17Z We analyse surface sediment and its distribution in Flandres Bay, West Antarctic Peninsula, in order to understand modern day sediment dispersal patterns in a fjord with retreating, tidewater glaciers. The surface sediment descriptions of 41 cores are included in this study. The sediment facies described include muddy diatomaceous ooze, diatomaceous mud, pebbly mud, sandy mud and mud, with scattered pebbles present in most samples. In contrast to a traditional conceptual model of glacial sediment distribution in fjords, grain size in Flandres Bay generally coarsens from the inner to outer bay. The smallest grain size sediments were found in the bay head and are interpreted as fine-grained deposits resulting from meltwater plumes and sediment gravity flows occurring close to the glacier front. The middle of the bay is characterized by a high silt percentage, which correlates to diatom-rich sediments. Sediments in the outer bay have a high component of coarse material, which is interpreted as being the result of winnowing from currents moving from the Bellingshausen Sea into the Gerlache Strait. Palaeoenvironmental reconstructions of glacial environments often use grain size as an indicator of proximity to the ice margin. After a detailed analysis of a large number of cores collected in the study area, our findings highlight the variability in sedimentation patterns within a fjord and provide a valuable evidence of the complexity that may occur in the sedimentary record.Keywords: Flandres Bay; Antarctic Peninsula; sediment distribution; grain size.(Published: 12 August 2016)To access the supplementary material for this article, please see the supplementary files in the column to the right (under Article Tools).Citation: Polar Research 2016, 35, 25284, http://dx.doi.org/10.3402/polar.v35.25284 Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Polar Research Tidewater Polar Research Antarctic Antarctic Peninsula Bellingshausen Sea Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Gerlache Strait ENVELOPE(-62.333,-62.333,-64.500,-64.500) Flandres ENVELOPE(-63.417,-63.417,-65.033,-65.033) Flandres Bay ENVELOPE(-63.312,-63.312,-65.040,-65.040) Polar Research 35 1 25284 |
institution |
Open Polar |
collection |
Polar Research |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Flandres Bay Antarctic Peninsula sediment distribution grain size |
spellingShingle |
Flandres Bay Antarctic Peninsula sediment distribution grain size Munoz, Yuribia P. Wellner, Julia S. Local controls on sediment accumulation and distribution in a fjord in the West Antarctic Peninsula: implications for palaeoenvironmental interpretations |
topic_facet |
Flandres Bay Antarctic Peninsula sediment distribution grain size |
description |
We analyse surface sediment and its distribution in Flandres Bay, West Antarctic Peninsula, in order to understand modern day sediment dispersal patterns in a fjord with retreating, tidewater glaciers. The surface sediment descriptions of 41 cores are included in this study. The sediment facies described include muddy diatomaceous ooze, diatomaceous mud, pebbly mud, sandy mud and mud, with scattered pebbles present in most samples. In contrast to a traditional conceptual model of glacial sediment distribution in fjords, grain size in Flandres Bay generally coarsens from the inner to outer bay. The smallest grain size sediments were found in the bay head and are interpreted as fine-grained deposits resulting from meltwater plumes and sediment gravity flows occurring close to the glacier front. The middle of the bay is characterized by a high silt percentage, which correlates to diatom-rich sediments. Sediments in the outer bay have a high component of coarse material, which is interpreted as being the result of winnowing from currents moving from the Bellingshausen Sea into the Gerlache Strait. Palaeoenvironmental reconstructions of glacial environments often use grain size as an indicator of proximity to the ice margin. After a detailed analysis of a large number of cores collected in the study area, our findings highlight the variability in sedimentation patterns within a fjord and provide a valuable evidence of the complexity that may occur in the sedimentary record.Keywords: Flandres Bay; Antarctic Peninsula; sediment distribution; grain size.(Published: 12 August 2016)To access the supplementary material for this article, please see the supplementary files in the column to the right (under Article Tools).Citation: Polar Research 2016, 35, 25284, http://dx.doi.org/10.3402/polar.v35.25284 |
format |
Article in Journal/Newspaper |
author |
Munoz, Yuribia P. Wellner, Julia S. |
author_facet |
Munoz, Yuribia P. Wellner, Julia S. |
author_sort |
Munoz, Yuribia P. |
title |
Local controls on sediment accumulation and distribution in a fjord in the West Antarctic Peninsula: implications for palaeoenvironmental interpretations |
title_short |
Local controls on sediment accumulation and distribution in a fjord in the West Antarctic Peninsula: implications for palaeoenvironmental interpretations |
title_full |
Local controls on sediment accumulation and distribution in a fjord in the West Antarctic Peninsula: implications for palaeoenvironmental interpretations |
title_fullStr |
Local controls on sediment accumulation and distribution in a fjord in the West Antarctic Peninsula: implications for palaeoenvironmental interpretations |
title_full_unstemmed |
Local controls on sediment accumulation and distribution in a fjord in the West Antarctic Peninsula: implications for palaeoenvironmental interpretations |
title_sort |
local controls on sediment accumulation and distribution in a fjord in the west antarctic peninsula: implications for palaeoenvironmental interpretations |
publisher |
Norwegian Polar Institute |
publishDate |
2016 |
url |
https://polarresearch.net/index.php/polar/article/view/3263 https://doi.org/10.3402/polar.v35.25284 |
long_lat |
ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-62.333,-62.333,-64.500,-64.500) ENVELOPE(-63.417,-63.417,-65.033,-65.033) ENVELOPE(-63.312,-63.312,-65.040,-65.040) |
geographic |
Antarctic Antarctic Peninsula Bellingshausen Sea Gerlache Gerlache Strait Flandres Flandres Bay |
geographic_facet |
Antarctic Antarctic Peninsula Bellingshausen Sea Gerlache Gerlache Strait Flandres Flandres Bay |
genre |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Polar Research Tidewater |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Polar Research Tidewater |
op_source |
Polar Research; Vol 35 (2016) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3263/8662 https://polarresearch.net/index.php/polar/article/view/3263/8663 https://polarresearch.net/index.php/polar/article/view/3263/8664 https://polarresearch.net/index.php/polar/article/view/3263/8665 https://polarresearch.net/index.php/polar/article/view/3263/8670 https://polarresearch.net/index.php/polar/article/view/3263 doi:10.3402/polar.v35.25284 |
op_doi |
https://doi.org/10.3402/polar.v35.25284 |
container_title |
Polar Research |
container_volume |
35 |
container_issue |
1 |
container_start_page |
25284 |
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1809823779923165184 |