Sediment and water geochemistry record of water-rock interactions in King George Island, Antarctic Peninsula
Abstract We used a multidisciplinary approach integrating major, trace and rare earth element geochemistry, mineralogy of rocks and sediments along with the ionic composition of water reservoirs of Admiralty Bay, King George Island, to evaluate the record of water-rock interactions under Maritime An...
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Online Access: | http://dx.doi.org/10.1017/s0954102021000560 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102021000560 |
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crcambridgeupr:10.1017/s0954102021000560 2024-09-15T17:40:37+00:00 Sediment and water geochemistry record of water-rock interactions in King George Island, Antarctic Peninsula Gunes, Yagmur Balci, Nurgul ITU Scientific Research Projects Division Presidency of The Republic of Turkey, Ministry of Industry and Technology TUBITAK 2022 http://dx.doi.org/10.1017/s0954102021000560 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102021000560 en eng Cambridge University Press (CUP) https://creativecommons.org/licenses/by/4.0/ Antarctic Science volume 34, issue 1, page 58-78 ISSN 0954-1020 1365-2079 journal-article 2022 crcambridgeupr https://doi.org/10.1017/s0954102021000560 2024-07-31T04:04:30Z Abstract We used a multidisciplinary approach integrating major, trace and rare earth element geochemistry, mineralogy of rocks and sediments along with the ionic composition of water reservoirs of Admiralty Bay, King George Island, to evaluate the record of water-rock interactions under Maritime Antarctic conditions. Our results showed that the ionic compositions of the streams and meltwaters predominantly reflect the atmospheric inputs, while lake waters have higher Na/Cl, Ca/Mg and HCO 3 /Cl ratios related to chemical weathering in lake sediments, but this did not allow for distinguishing purely silicate sources. Consistent with the trace and rare earth element data, various alteration indices and Index of Compositional Variability values denote the low degree of chemical weathering in the lake sediments. The records from the previously unexplored Mud Lake and Upper Lake suggest that the lakes of Admiralty Bay are better places to trace the impacts of a succession of environmental changes that have occurred in the watershed, while the stream channel sediments, when accompanied by water chemistry data, may provide a more representative composition of the source rocks than the lake sediments. These findings may help revealing the intensity of contemporary weathering in a colder climate with relatively few mineralogical changes accompanied by a lesser degree of elemental loss. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science King George Island Cambridge University Press Antarctic Science 34 1 58 78 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract We used a multidisciplinary approach integrating major, trace and rare earth element geochemistry, mineralogy of rocks and sediments along with the ionic composition of water reservoirs of Admiralty Bay, King George Island, to evaluate the record of water-rock interactions under Maritime Antarctic conditions. Our results showed that the ionic compositions of the streams and meltwaters predominantly reflect the atmospheric inputs, while lake waters have higher Na/Cl, Ca/Mg and HCO 3 /Cl ratios related to chemical weathering in lake sediments, but this did not allow for distinguishing purely silicate sources. Consistent with the trace and rare earth element data, various alteration indices and Index of Compositional Variability values denote the low degree of chemical weathering in the lake sediments. The records from the previously unexplored Mud Lake and Upper Lake suggest that the lakes of Admiralty Bay are better places to trace the impacts of a succession of environmental changes that have occurred in the watershed, while the stream channel sediments, when accompanied by water chemistry data, may provide a more representative composition of the source rocks than the lake sediments. These findings may help revealing the intensity of contemporary weathering in a colder climate with relatively few mineralogical changes accompanied by a lesser degree of elemental loss. |
author2 |
ITU Scientific Research Projects Division Presidency of The Republic of Turkey, Ministry of Industry and Technology TUBITAK |
format |
Article in Journal/Newspaper |
author |
Gunes, Yagmur Balci, Nurgul |
spellingShingle |
Gunes, Yagmur Balci, Nurgul Sediment and water geochemistry record of water-rock interactions in King George Island, Antarctic Peninsula |
author_facet |
Gunes, Yagmur Balci, Nurgul |
author_sort |
Gunes, Yagmur |
title |
Sediment and water geochemistry record of water-rock interactions in King George Island, Antarctic Peninsula |
title_short |
Sediment and water geochemistry record of water-rock interactions in King George Island, Antarctic Peninsula |
title_full |
Sediment and water geochemistry record of water-rock interactions in King George Island, Antarctic Peninsula |
title_fullStr |
Sediment and water geochemistry record of water-rock interactions in King George Island, Antarctic Peninsula |
title_full_unstemmed |
Sediment and water geochemistry record of water-rock interactions in King George Island, Antarctic Peninsula |
title_sort |
sediment and water geochemistry record of water-rock interactions in king george island, antarctic peninsula |
publisher |
Cambridge University Press (CUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1017/s0954102021000560 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102021000560 |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science King George Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science King George Island |
op_source |
Antarctic Science volume 34, issue 1, page 58-78 ISSN 0954-1020 1365-2079 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/s0954102021000560 |
container_title |
Antarctic Science |
container_volume |
34 |
container_issue |
1 |
container_start_page |
58 |
op_container_end_page |
78 |
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1810486640978690048 |