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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ftdoajarticles:oai:doaj.org/article:c1a261953ac64089bccd23d20d20e806 2023-05-15T13:36:00+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 2019-03-01T00:00:00Z https://doi.org/10.3390/min9030153 https://doaj.org/article/c1a261953ac64089bccd23d20d20e806 EN eng MDPI AG http://www.mdpi.com/2075-163X/9/3/153 https://doaj.org/toc/2075-163X 2075-163X doi:10.3390/min9030153 https://doaj.org/article/c1a261953ac64089bccd23d20d20e806 Minerals, Vol 9, Iss 3, p 153 (2019) Larsen ice shelf clay mineral composition smectite/illite isotopic composition ice shelf retreat and advance Mineralogy QE351-399.2 article 2019 ftdoajarticles https://doi.org/10.3390/min9030153 2022-12-31T02:14:53Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Korea Polar Research Institute Larsen Ice Shelf Weddell Sea Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula Larsen Ice Shelf ENVELOPE(-62.500,-62.500,-67.500,-67.500) The Antarctic Weddell Weddell Sea Minerals 9 3 153 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Larsen ice shelf clay mineral composition smectite/illite isotopic composition ice shelf retreat and advance Mineralogy QE351-399.2 |
spellingShingle |
Larsen ice shelf clay mineral composition smectite/illite isotopic composition ice shelf retreat and advance Mineralogy QE351-399.2 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 Mineralogy QE351-399.2 |
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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2019 |
url |
https://doi.org/10.3390/min9030153 https://doaj.org/article/c1a261953ac64089bccd23d20d20e806 |
long_lat |
ENVELOPE(-62.500,-62.500,-67.500,-67.500) |
geographic |
Antarctic Antarctic Peninsula Larsen Ice Shelf The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Larsen Ice Shelf The Antarctic Weddell Weddell Sea |
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, Vol 9, Iss 3, p 153 (2019) |
op_relation |
http://www.mdpi.com/2075-163X/9/3/153 https://doaj.org/toc/2075-163X 2075-163X doi:10.3390/min9030153 https://doaj.org/article/c1a261953ac64089bccd23d20d20e806 |
op_doi |
https://doi.org/10.3390/min9030153 |
container_title |
Minerals |
container_volume |
9 |
container_issue |
3 |
container_start_page |
153 |
_version_ |
1766072942664351744 |