Origin of Clay Minerals of Core RS14-GC2 in the Continental Slope to the East of the Pennell-Iselin Bank in the Ross Sea, Antarctica
A gravity core (RS14-C2) was collected at site RS14-C2 in the continental slope to the east of Pennell-Isellin Bank of the Ross Sea (Antarctica) during PNRA XXIX (Rosslope II Project) Expedition. In order to trace the sediment source, magnetic susceptibility (MS), sand fraction, and clay mineral com...
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ftunitriestiris:oai:arts.units.it:11368/2941790 2023-05-15T13:39:49+02:00 Origin of Clay Minerals of Core RS14-GC2 in the Continental Slope to the East of the Pennell-Iselin Bank in the Ross Sea, Antarctica Ha, Sangbeom Khim, Boo-Keun Cho, Hyen Goo Colizza, Ester Ha, Sangbeom Khim, Boo-Keun Cho, Hyen Goo Colizza, Ester 2018 ELETTRONICO http://hdl.handle.net/11368/2941790 https://doi.org/10.9727/jmsk.2018.31.1.1 kor kor volume:31 issue:1 firstpage:1 lastpage:12 numberofpages:12 journal:HAN-GUKGWANGMULHAKOEJI http://hdl.handle.net/11368/2941790 doi:10.9727/jmsk.2018.31.1.1 info:eu-repo/semantics/closedAccess clay mineral sediment provenance glacial interglacial Ross Sea 점토광물 퇴적물 기원 빙하기 간빙기 로스해 info:eu-repo/semantics/article 2018 ftunitriestiris https://doi.org/10.9727/jmsk.2018.31.1.1 2023-04-09T06:15:36Z A gravity core (RS14-C2) was collected at site RS14-C2 in the continental slope to the east of Pennell-Isellin Bank of the Ross Sea (Antarctica) during PNRA XXIX (Rosslope II Project) Expedition. In order to trace the sediment source, magnetic susceptibility (MS), sand fraction, and clay mineral compositions were analyzed, and AMS 14C ages were dated. Core sediments consist mostly ofhemipelagic sandy clay or silty clay including ice-rafted debris (IRD). AMS 14C age of core-top indicates the modern and Holocene sediments. Based on AMS 14C dating, sediment color, MS and sand fraction, core sediments are divided into interglacial and glacial intervals. The interglacial brown sediments are characterized by low MS and sand fraction, whereas the glacial gray sediments are characterized by high MS and sand fraction. Among clay mineral compositions of core sediments, illite is highest (61.8~76.7%), and chlorite (15.7~21.3%), kaolinite (3.6~15.4%), and smectite (0.9~5.1%) are in decreasing order, and these compositions are also divided into the interglacial and glacial/deglacial intervals. During the glacial period, the high content of illite and chlorite indicate sediment supply from the bedrocks of Transantarctic Mountains under the Ross Ice Sheet. In contrast, because of decreasing supply of illite and chlorite by the glacial retreat, smectite and kaolinite contents increased relatively during the interglacial period. During the interglacial period, smectite may be transported additionally by the northeastward flowing surface current from the coast of Victoria Land in the western Ross Sea. Kaolinite may be also supplied to the continental slope by the Antarctic Slope Current from the kaolin-rich metasedimentary rock outcropped on the Edward VII Peninsula. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ross Sea Victoria Land Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) Antarctic Edward VII Peninsula ENVELOPE(-155.000,-155.000,-77.667,-77.667) Iselin Bank ENVELOPE(-179.000,-179.000,-72.500,-72.500) Ross Sea The Antarctic Transantarctic Mountains Victoria Land Journal of the mineralogical society of korea 31 1 1 12 |
institution |
Open Polar |
collection |
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) |
op_collection_id |
ftunitriestiris |
language |
Korean |
topic |
clay mineral sediment provenance glacial interglacial Ross Sea 점토광물 퇴적물 기원 빙하기 간빙기 로스해 |
spellingShingle |
clay mineral sediment provenance glacial interglacial Ross Sea 점토광물 퇴적물 기원 빙하기 간빙기 로스해 Ha, Sangbeom Khim, Boo-Keun Cho, Hyen Goo Colizza, Ester Origin of Clay Minerals of Core RS14-GC2 in the Continental Slope to the East of the Pennell-Iselin Bank in the Ross Sea, Antarctica |
topic_facet |
clay mineral sediment provenance glacial interglacial Ross Sea 점토광물 퇴적물 기원 빙하기 간빙기 로스해 |
description |
A gravity core (RS14-C2) was collected at site RS14-C2 in the continental slope to the east of Pennell-Isellin Bank of the Ross Sea (Antarctica) during PNRA XXIX (Rosslope II Project) Expedition. In order to trace the sediment source, magnetic susceptibility (MS), sand fraction, and clay mineral compositions were analyzed, and AMS 14C ages were dated. Core sediments consist mostly ofhemipelagic sandy clay or silty clay including ice-rafted debris (IRD). AMS 14C age of core-top indicates the modern and Holocene sediments. Based on AMS 14C dating, sediment color, MS and sand fraction, core sediments are divided into interglacial and glacial intervals. The interglacial brown sediments are characterized by low MS and sand fraction, whereas the glacial gray sediments are characterized by high MS and sand fraction. Among clay mineral compositions of core sediments, illite is highest (61.8~76.7%), and chlorite (15.7~21.3%), kaolinite (3.6~15.4%), and smectite (0.9~5.1%) are in decreasing order, and these compositions are also divided into the interglacial and glacial/deglacial intervals. During the glacial period, the high content of illite and chlorite indicate sediment supply from the bedrocks of Transantarctic Mountains under the Ross Ice Sheet. In contrast, because of decreasing supply of illite and chlorite by the glacial retreat, smectite and kaolinite contents increased relatively during the interglacial period. During the interglacial period, smectite may be transported additionally by the northeastward flowing surface current from the coast of Victoria Land in the western Ross Sea. Kaolinite may be also supplied to the continental slope by the Antarctic Slope Current from the kaolin-rich metasedimentary rock outcropped on the Edward VII Peninsula. |
author2 |
Ha, Sangbeom Khim, Boo-Keun Cho, Hyen Goo Colizza, Ester |
format |
Article in Journal/Newspaper |
author |
Ha, Sangbeom Khim, Boo-Keun Cho, Hyen Goo Colizza, Ester |
author_facet |
Ha, Sangbeom Khim, Boo-Keun Cho, Hyen Goo Colizza, Ester |
author_sort |
Ha, Sangbeom |
title |
Origin of Clay Minerals of Core RS14-GC2 in the Continental Slope to the East of the Pennell-Iselin Bank in the Ross Sea, Antarctica |
title_short |
Origin of Clay Minerals of Core RS14-GC2 in the Continental Slope to the East of the Pennell-Iselin Bank in the Ross Sea, Antarctica |
title_full |
Origin of Clay Minerals of Core RS14-GC2 in the Continental Slope to the East of the Pennell-Iselin Bank in the Ross Sea, Antarctica |
title_fullStr |
Origin of Clay Minerals of Core RS14-GC2 in the Continental Slope to the East of the Pennell-Iselin Bank in the Ross Sea, Antarctica |
title_full_unstemmed |
Origin of Clay Minerals of Core RS14-GC2 in the Continental Slope to the East of the Pennell-Iselin Bank in the Ross Sea, Antarctica |
title_sort |
origin of clay minerals of core rs14-gc2 in the continental slope to the east of the pennell-iselin bank in the ross sea, antarctica |
publishDate |
2018 |
url |
http://hdl.handle.net/11368/2941790 https://doi.org/10.9727/jmsk.2018.31.1.1 |
long_lat |
ENVELOPE(-155.000,-155.000,-77.667,-77.667) ENVELOPE(-179.000,-179.000,-72.500,-72.500) |
geographic |
Antarctic Edward VII Peninsula Iselin Bank Ross Sea The Antarctic Transantarctic Mountains Victoria Land |
geographic_facet |
Antarctic Edward VII Peninsula Iselin Bank Ross Sea The Antarctic Transantarctic Mountains Victoria Land |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ross Sea Victoria Land |
op_relation |
volume:31 issue:1 firstpage:1 lastpage:12 numberofpages:12 journal:HAN-GUKGWANGMULHAKOEJI http://hdl.handle.net/11368/2941790 doi:10.9727/jmsk.2018.31.1.1 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.9727/jmsk.2018.31.1.1 |
container_title |
Journal of the mineralogical society of korea |
container_volume |
31 |
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1 |
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1 |
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12 |
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1766125235766034432 |