Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica
Variations in grain size, clay mineral composition, and stable isotopes (δ13C and δ15N) are closely linked to the sedimentary facies that reflect mineralogical and geochemical modification during the retreat and advance of the Larsen ice shelf. A whole round core of marine sediment (EAP13-GC17, 236...
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ftmdpi:oai:mdpi.com:/2075-163X/9/3/153/ 2023-08-20T04:01:35+02:00 Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica Jaewoo Jung Kyu-Cheul Yoo Kee-Hwan Lee Young Kyu Park Jae Il Lee Jinwook Kim agris 2019-03-03 application/pdf https://doi.org/10.3390/min9030153 EN eng Multidisciplinary Digital Publishing Institute Environmental Mineralogy and Biogeochemistry https://dx.doi.org/10.3390/min9030153 https://creativecommons.org/licenses/by/4.0/ Minerals; Volume 9; Issue 3; Pages: 153 Larsen ice shelf clay mineral composition smectite/illite isotopic composition ice shelf retreat and advance Text 2019 ftmdpi https://doi.org/10.3390/min9030153 2023-07-31T22:05:11Z Variations in grain size, clay mineral composition, and stable isotopes (δ13C and δ15N) are closely linked to the sedimentary facies that reflect mineralogical and geochemical modification during the retreat and advance of the Larsen ice shelf. A whole round core of marine sediment (EAP13-GC17, 236 cm below the sea floor) was collected on the northwestern Larsen B embayment of the Antarctic Peninsula during a marine geological expedition (the ARA13 Cruise Expedition by the Korea Polar Research Institute, 2013). Four sedimentary facies (U1–U4) were clearly distinguishable: bioturbated sandy mud (open marine, U1), laminated sandy mud (sub–floating ice shelf, U2), sandy clay aggregates (deglacial, U3), and muddy diamictons (sub-glacial, U4), as well as interbedded silty. Clay minerals, including smectite, chlorite, illite, and kaolinite, were detected throughout the core. An increase in the clay mineral ratio of smectite/(illite + chlorite) was clearly observed in the open marine condition, which was strongly indicated by both a heavier isotopic composition of δ13C and δ15N (−24.4‰ and 4.3‰, respectively), and an abrupt increase in 10Be concentration (~30 times). An increase in the average values of the crystal packet thickness of illite (~1.5 times) in U1 also indicated sediments transported in open marine conditions. Based on the clay mineral composition in U1, the sediments are likely to have been transported from the Weddell Sea. The clay mineralogical assessments conducted in this region have significant implications for our understanding of paleodepositional environments. Text Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Korea Polar Research Institute Larsen Ice Shelf Weddell Sea MDPI Open Access Publishing Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell Larsen Ice Shelf ENVELOPE(-62.500,-62.500,-67.500,-67.500) Minerals 9 3 153 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Larsen ice shelf clay mineral composition smectite/illite isotopic composition ice shelf retreat and advance |
spellingShingle |
Larsen ice shelf clay mineral composition smectite/illite isotopic composition ice shelf retreat and advance Jaewoo Jung Kyu-Cheul Yoo Kee-Hwan Lee Young Kyu Park Jae Il Lee Jinwook Kim Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica |
topic_facet |
Larsen ice shelf clay mineral composition smectite/illite isotopic composition ice shelf retreat and advance |
description |
Variations in grain size, clay mineral composition, and stable isotopes (δ13C and δ15N) are closely linked to the sedimentary facies that reflect mineralogical and geochemical modification during the retreat and advance of the Larsen ice shelf. A whole round core of marine sediment (EAP13-GC17, 236 cm below the sea floor) was collected on the northwestern Larsen B embayment of the Antarctic Peninsula during a marine geological expedition (the ARA13 Cruise Expedition by the Korea Polar Research Institute, 2013). Four sedimentary facies (U1–U4) were clearly distinguishable: bioturbated sandy mud (open marine, U1), laminated sandy mud (sub–floating ice shelf, U2), sandy clay aggregates (deglacial, U3), and muddy diamictons (sub-glacial, U4), as well as interbedded silty. Clay minerals, including smectite, chlorite, illite, and kaolinite, were detected throughout the core. An increase in the clay mineral ratio of smectite/(illite + chlorite) was clearly observed in the open marine condition, which was strongly indicated by both a heavier isotopic composition of δ13C and δ15N (−24.4‰ and 4.3‰, respectively), and an abrupt increase in 10Be concentration (~30 times). An increase in the average values of the crystal packet thickness of illite (~1.5 times) in U1 also indicated sediments transported in open marine conditions. Based on the clay mineral composition in U1, the sediments are likely to have been transported from the Weddell Sea. The clay mineralogical assessments conducted in this region have significant implications for our understanding of paleodepositional environments. |
format |
Text |
author |
Jaewoo Jung Kyu-Cheul Yoo Kee-Hwan Lee Young Kyu Park Jae Il Lee Jinwook Kim |
author_facet |
Jaewoo Jung Kyu-Cheul Yoo Kee-Hwan Lee Young Kyu Park Jae Il Lee Jinwook Kim |
author_sort |
Jaewoo Jung |
title |
Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica |
title_short |
Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica |
title_full |
Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica |
title_fullStr |
Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica |
title_full_unstemmed |
Clay Mineralogical Characteristics of Sediments Deposited during the Late Quaternary in the Larsen Ice Shelf B Embayment, Antarctica |
title_sort |
clay mineralogical characteristics of sediments deposited during the late quaternary in the larsen ice shelf b embayment, antarctica |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/min9030153 |
op_coverage |
agris |
long_lat |
ENVELOPE(-62.500,-62.500,-67.500,-67.500) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell Larsen Ice Shelf |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell Larsen Ice Shelf |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Korea Polar Research Institute Larsen Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Korea Polar Research Institute Larsen Ice Shelf Weddell Sea |
op_source |
Minerals; Volume 9; Issue 3; Pages: 153 |
op_relation |
Environmental Mineralogy and Biogeochemistry https://dx.doi.org/10.3390/min9030153 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/min9030153 |
container_title |
Minerals |
container_volume |
9 |
container_issue |
3 |
container_start_page |
153 |
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1774724829208903680 |