Clay mineral analysis of sediments from the Amundsen Sea
The Amundsen Sea embayment is a probable site for the initiation of a future collapse of the West Antarctic Ice Sheet. This paper contributes to a better understanding of the transport pathways of subglacial sediments into this embayment at present and during the last glacial period. It discusses th...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.755199 2023-05-15T13:23:47+02:00 Clay mineral analysis of sediments from the Amundsen Sea Ehrmann, Werner Hillenbrand, Claus-Dieter Smith, James A Graham, Alastair G C Kuhn, Gerhard Larter, Robert D MEDIAN LATITUDE: -73.536975 * MEDIAN LONGITUDE: -109.636079 * SOUTH-BOUND LATITUDE: -74.682500 * WEST-BOUND LONGITUDE: -118.478300 * NORTH-BOUND LATITUDE: -69.308000 * EAST-BOUND LONGITUDE: -102.992200 * DATE/TIME START: 2001-03-09T17:46:00 * DATE/TIME END: 2008-03-13T16:49:00 2011-12-14 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.755199 https://doi.org/10.1594/PANGAEA.755199 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.755199 https://doi.org/10.1594/PANGAEA.755199 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Ehrmann, Werner; Hillenbrand, Claus-Dieter; Smith, James A; Graham, Alastair G C; Kuhn, Gerhard; Larter, Robert D (2011): Provenance changes between recent and glacial-time sediments in the Amundsen Sea embayment, West Antarctica: clay mineral assemblage evidence. Antarctic Science, 23(5), 471-486, https://doi.org/10.1017/S0954102011000320 Amundsen Sea ANT-XVIII/5a ANT-XXIII/4 BC BC395 BC398 BC403 BC407 BC409 BC412 BC416 BC420 BC421 BC423 BC426 BC429 BC431 BC433 BC435 BC437 BC439 BC442 BC443 BC446 BC448 BC451 BC455 BC472 BC474 BC476 BC477 BC480 BC482 BC483 BC485 BC486 BC487 BC488 Box corer GC Giant box corer GKG Gravity corer James Clark Ross JR141_BC395 JR141_BC398 JR141_BC403 JR141_BC407 JR141_BC409 JR141_BC412 Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.755199 https://doi.org/10.1017/S0954102011000320 2023-01-20T07:32:00Z The Amundsen Sea embayment is a probable site for the initiation of a future collapse of the West Antarctic Ice Sheet. This paper contributes to a better understanding of the transport pathways of subglacial sediments into this embayment at present and during the last glacial period. It discusses the clay mineral composition of sediment samples taken from the seafloor surface and marine cores in order to decipher spatial and temporal changes in the sediment provenance. The most striking feature in the presentday clay mineral distribution is the high concentration of kaolinite, which is mainly supplied by the Thwaites Glacier system and indicates the presence of hitherto unknown kaolinite-bearing sedimentary strata in the hinterland, probably in the Byrd Subglacial Basin. The main illite input is via the Pine Island Glacier. Smectite originates from the erosion of volcanic rocks in Ellsworth Land and western Marie Byrd Land. The clay mineral assemblages in diamictons deposited during the last glacial period are distinctly different from those in corresponding surface sediments. This relationship indicates that glacial sediment sources were different from modern ones, which could reflect changes in the catchment areas of the glaciers and ice streams. Dataset Amundsen Sea Antarc* Antarctic Antarctic Science Ice Sheet Marie Byrd Land Pine Island Glacier Thwaites Glacier PANGAEA - Data Publisher for Earth & Environmental Science Amundsen Sea Antarctic Byrd Byrd Subglacial Basin ENVELOPE(-115.000,-115.000,-80.000,-80.000) Ellsworth Land ENVELOPE(-85.000,-85.000,-75.000,-75.000) Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) West Antarctic Ice Sheet ENVELOPE(-118.478300,-102.992200,-69.308000,-74.682500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Amundsen Sea ANT-XVIII/5a ANT-XXIII/4 BC BC395 BC398 BC403 BC407 BC409 BC412 BC416 BC420 BC421 BC423 BC426 BC429 BC431 BC433 BC435 BC437 BC439 BC442 BC443 BC446 BC448 BC451 BC455 BC472 BC474 BC476 BC477 BC480 BC482 BC483 BC485 BC486 BC487 BC488 Box corer GC Giant box corer GKG Gravity corer James Clark Ross JR141_BC395 JR141_BC398 JR141_BC403 JR141_BC407 JR141_BC409 JR141_BC412 |
spellingShingle |
Amundsen Sea ANT-XVIII/5a ANT-XXIII/4 BC BC395 BC398 BC403 BC407 BC409 BC412 BC416 BC420 BC421 BC423 BC426 BC429 BC431 BC433 BC435 BC437 BC439 BC442 BC443 BC446 BC448 BC451 BC455 BC472 BC474 BC476 BC477 BC480 BC482 BC483 BC485 BC486 BC487 BC488 Box corer GC Giant box corer GKG Gravity corer James Clark Ross JR141_BC395 JR141_BC398 JR141_BC403 JR141_BC407 JR141_BC409 JR141_BC412 Ehrmann, Werner Hillenbrand, Claus-Dieter Smith, James A Graham, Alastair G C Kuhn, Gerhard Larter, Robert D Clay mineral analysis of sediments from the Amundsen Sea |
topic_facet |
Amundsen Sea ANT-XVIII/5a ANT-XXIII/4 BC BC395 BC398 BC403 BC407 BC409 BC412 BC416 BC420 BC421 BC423 BC426 BC429 BC431 BC433 BC435 BC437 BC439 BC442 BC443 BC446 BC448 BC451 BC455 BC472 BC474 BC476 BC477 BC480 BC482 BC483 BC485 BC486 BC487 BC488 Box corer GC Giant box corer GKG Gravity corer James Clark Ross JR141_BC395 JR141_BC398 JR141_BC403 JR141_BC407 JR141_BC409 JR141_BC412 |
description |
The Amundsen Sea embayment is a probable site for the initiation of a future collapse of the West Antarctic Ice Sheet. This paper contributes to a better understanding of the transport pathways of subglacial sediments into this embayment at present and during the last glacial period. It discusses the clay mineral composition of sediment samples taken from the seafloor surface and marine cores in order to decipher spatial and temporal changes in the sediment provenance. The most striking feature in the presentday clay mineral distribution is the high concentration of kaolinite, which is mainly supplied by the Thwaites Glacier system and indicates the presence of hitherto unknown kaolinite-bearing sedimentary strata in the hinterland, probably in the Byrd Subglacial Basin. The main illite input is via the Pine Island Glacier. Smectite originates from the erosion of volcanic rocks in Ellsworth Land and western Marie Byrd Land. The clay mineral assemblages in diamictons deposited during the last glacial period are distinctly different from those in corresponding surface sediments. This relationship indicates that glacial sediment sources were different from modern ones, which could reflect changes in the catchment areas of the glaciers and ice streams. |
format |
Dataset |
author |
Ehrmann, Werner Hillenbrand, Claus-Dieter Smith, James A Graham, Alastair G C Kuhn, Gerhard Larter, Robert D |
author_facet |
Ehrmann, Werner Hillenbrand, Claus-Dieter Smith, James A Graham, Alastair G C Kuhn, Gerhard Larter, Robert D |
author_sort |
Ehrmann, Werner |
title |
Clay mineral analysis of sediments from the Amundsen Sea |
title_short |
Clay mineral analysis of sediments from the Amundsen Sea |
title_full |
Clay mineral analysis of sediments from the Amundsen Sea |
title_fullStr |
Clay mineral analysis of sediments from the Amundsen Sea |
title_full_unstemmed |
Clay mineral analysis of sediments from the Amundsen Sea |
title_sort |
clay mineral analysis of sediments from the amundsen sea |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.755199 https://doi.org/10.1594/PANGAEA.755199 |
op_coverage |
MEDIAN LATITUDE: -73.536975 * MEDIAN LONGITUDE: -109.636079 * SOUTH-BOUND LATITUDE: -74.682500 * WEST-BOUND LONGITUDE: -118.478300 * NORTH-BOUND LATITUDE: -69.308000 * EAST-BOUND LONGITUDE: -102.992200 * DATE/TIME START: 2001-03-09T17:46:00 * DATE/TIME END: 2008-03-13T16:49:00 |
long_lat |
ENVELOPE(-115.000,-115.000,-80.000,-80.000) ENVELOPE(-85.000,-85.000,-75.000,-75.000) ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-101.000,-101.000,-75.000,-75.000) ENVELOPE(-106.750,-106.750,-75.500,-75.500) ENVELOPE(-118.478300,-102.992200,-69.308000,-74.682500) |
geographic |
Amundsen Sea Antarctic Byrd Byrd Subglacial Basin Ellsworth Land Marie Byrd Land Pine Island Glacier Thwaites Glacier West Antarctic Ice Sheet |
geographic_facet |
Amundsen Sea Antarctic Byrd Byrd Subglacial Basin Ellsworth Land Marie Byrd Land Pine Island Glacier Thwaites Glacier West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Science Ice Sheet Marie Byrd Land Pine Island Glacier Thwaites Glacier |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Science Ice Sheet Marie Byrd Land Pine Island Glacier Thwaites Glacier |
op_source |
Supplement to: Ehrmann, Werner; Hillenbrand, Claus-Dieter; Smith, James A; Graham, Alastair G C; Kuhn, Gerhard; Larter, Robert D (2011): Provenance changes between recent and glacial-time sediments in the Amundsen Sea embayment, West Antarctica: clay mineral assemblage evidence. Antarctic Science, 23(5), 471-486, https://doi.org/10.1017/S0954102011000320 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.755199 https://doi.org/10.1594/PANGAEA.755199 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.755199 https://doi.org/10.1017/S0954102011000320 |
_version_ |
1766375225370345472 |