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
2016
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fttriple:oai:gotriple.eu:oai:doaj.org/article:97812abbcc52491999946aa8902208b5 2023-05-15T13:35:43+02:00 Local controls on sediment accumulation and distribution in a fjord in the West Antarctic Peninsula: implications for palaeoenvironmental interpretations Yuribia P. Munoz Julia S. Wellner 2016-08-01 https://doi.org/10.3402/polar.v35.25284 https://doaj.org/article/97812abbcc52491999946aa8902208b5 en eng Norwegian Polar Institute 1751-8369 doi:10.3402/polar.v35.25284 https://doaj.org/article/97812abbcc52491999946aa8902208b5 undefined Polar Research, Vol 35, Iss 0, Pp 1-15 (2016) Flandres Bay Antarctic Peninsula sediment distribution grain size geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.3402/polar.v35.25284 2023-01-22T16:58:44Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Polar Research Tidewater Unknown Antarctic Antarctic Peninsula Bellingshausen Sea Flandres ENVELOPE(-63.417,-63.417,-65.033,-65.033) Flandres Bay ENVELOPE(-63.312,-63.312,-65.040,-65.040) Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Gerlache Strait ENVELOPE(-62.333,-62.333,-64.500,-64.500) Polar Research 35 1 25284 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Flandres Bay Antarctic Peninsula sediment distribution grain size geo envir |
spellingShingle |
Flandres Bay Antarctic Peninsula sediment distribution grain size geo envir Yuribia P. Munoz Julia S. Wellner 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 geo envir |
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. |
format |
Article in Journal/Newspaper |
author |
Yuribia P. Munoz Julia S. Wellner |
author_facet |
Yuribia P. Munoz Julia S. Wellner |
author_sort |
Yuribia P. Munoz |
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://doi.org/10.3402/polar.v35.25284 https://doaj.org/article/97812abbcc52491999946aa8902208b5 |
long_lat |
ENVELOPE(-63.417,-63.417,-65.033,-65.033) ENVELOPE(-63.312,-63.312,-65.040,-65.040) ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-62.333,-62.333,-64.500,-64.500) |
geographic |
Antarctic Antarctic Peninsula Bellingshausen Sea Flandres Flandres Bay Gerlache Gerlache Strait |
geographic_facet |
Antarctic Antarctic Peninsula Bellingshausen Sea Flandres Flandres Bay Gerlache Gerlache Strait |
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, Iss 0, Pp 1-15 (2016) |
op_relation |
1751-8369 doi:10.3402/polar.v35.25284 https://doaj.org/article/97812abbcc52491999946aa8902208b5 |
op_rights |
undefined |
op_doi |
https://doi.org/10.3402/polar.v35.25284 |
container_title |
Polar Research |
container_volume |
35 |
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container_start_page |
25284 |
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1766069243117305856 |