Sedimentology of lower Pliocene to Upper Pleistocene diamictons from IODP Site U1358, Wilkes Land margin, and implications for East Antarctic Ice Sheet dynamics
AbstractDuring the early Pliocene a dynamic marine-based ice sheet retreated from the Wilkes Land margin with periodic ice advances beyond Last Glacial Maximum position. A change in sand provenance is indicative of a more stable Mertz Glacier system during the Late Pleistocene. East Antarctic Ice Sh...
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ftcdlib:oai:escholarship.org/ark:/13030/qt9953d634 2023-05-15T13:39:57+02:00 Sedimentology of lower Pliocene to Upper Pleistocene diamictons from IODP Site U1358, Wilkes Land margin, and implications for East Antarctic Ice Sheet dynamics Orejola, Nadine Passchier, Sandra Brinkhuis, Hendrik Escutia Dotti, Carlota Klaus, Adam Fehr, Annick Williams, Trevor Bendle, James AP Bijl, Peter K Bohaty, Steven M Carr, Stephanie A Dunbar, Robert B Flores, Jose-Abel Gonzalez, Jhon J Hayden, Travis G Iwai, Masao Jimenez-Espejo, Francisco J Katsuki, Kota Kong, Gee Soo McKay, Robert M Nakai, Mutsumi Olney, Matthew P Pekar, Stephen F Pross, Joerg Riesselman, Christina Roehl, Ursula Sakai, Toyosaburo Shrivastava, Prakash Kumar Stickley, Catherine E Sugisaki, Saiko Tauxe, Lisa Tuo, Shouting van de Flierdt, Tina Welsh, Kevin Yamane, Masako Scientists, Iodp Expedition 318 183 - 192 2014-04-01 https://escholarship.org/uc/item/9953d634 unknown eScholarship, University of California qt9953d634 https://escholarship.org/uc/item/9953d634 public ANTARCTIC SCIENCE, vol 26, iss 2 continental shelf geochemistry heavy minerals particle size provenance Marine Biology & Hydrobiology Environmental Sciences Biological Sciences Earth Sciences article 2014 ftcdlib 2020-03-06T23:55:37Z AbstractDuring the early Pliocene a dynamic marine-based ice sheet retreated from the Wilkes Land margin with periodic ice advances beyond Last Glacial Maximum position. A change in sand provenance is indicative of a more stable Mertz Glacier system during the Late Pleistocene. East Antarctic Ice Sheet (EAIS) dynamics were evaluated through the analysis of marine diamictons from Integrated Ocean Drilling Program (IODP) site U1358 on the Adélie Land continental shelf. The warmer than present conditions of the early Pliocene coupled with the site's proximity to the landward sloping Wilkes Subglacial Basin provided the rationale for the investigations at this site. Based on visual core descriptions, particle size distributions, and major and trace element ratios, we interpret the origin of lower Pliocene strata by intermittent glaciomarine sedimentation with open-marine conditions and extensive glacial advances to the outer shelf. Heavy mineral analyses show that sand-sized detritus in the lower Pliocene strata was sourced from local intermediate to high-grade metamorphic rocks near Mertz Glacier. In contrast, Pleistocene diamictons exhibit a larger contribution from a prehnite-pumpellyite greenschist facies suggesting supply via iceberg rafting from northern Victoria Land. From this sedimentological evidence, we postulate a shift from a dynamic EAIS margin in the early Pliocene to possible stabilization in the Pleistocene. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Ice Sheet Iceberg* Mertz Glacier Victoria Land Wilkes Land University of California: eScholarship Antarctic East Antarctic Ice Sheet Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Victoria Land Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Wilkes Subglacial Basin ENVELOPE(145.000,145.000,-75.000,-75.000) |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
continental shelf geochemistry heavy minerals particle size provenance Marine Biology & Hydrobiology Environmental Sciences Biological Sciences Earth Sciences |
spellingShingle |
continental shelf geochemistry heavy minerals particle size provenance Marine Biology & Hydrobiology Environmental Sciences Biological Sciences Earth Sciences Orejola, Nadine Passchier, Sandra Brinkhuis, Hendrik Escutia Dotti, Carlota Klaus, Adam Fehr, Annick Williams, Trevor Bendle, James AP Bijl, Peter K Bohaty, Steven M Carr, Stephanie A Dunbar, Robert B Flores, Jose-Abel Gonzalez, Jhon J Hayden, Travis G Iwai, Masao Jimenez-Espejo, Francisco J Katsuki, Kota Kong, Gee Soo McKay, Robert M Nakai, Mutsumi Olney, Matthew P Pekar, Stephen F Pross, Joerg Riesselman, Christina Roehl, Ursula Sakai, Toyosaburo Shrivastava, Prakash Kumar Stickley, Catherine E Sugisaki, Saiko Tauxe, Lisa Tuo, Shouting van de Flierdt, Tina Welsh, Kevin Yamane, Masako Scientists, Iodp Expedition 318 Sedimentology of lower Pliocene to Upper Pleistocene diamictons from IODP Site U1358, Wilkes Land margin, and implications for East Antarctic Ice Sheet dynamics |
topic_facet |
continental shelf geochemistry heavy minerals particle size provenance Marine Biology & Hydrobiology Environmental Sciences Biological Sciences Earth Sciences |
description |
AbstractDuring the early Pliocene a dynamic marine-based ice sheet retreated from the Wilkes Land margin with periodic ice advances beyond Last Glacial Maximum position. A change in sand provenance is indicative of a more stable Mertz Glacier system during the Late Pleistocene. East Antarctic Ice Sheet (EAIS) dynamics were evaluated through the analysis of marine diamictons from Integrated Ocean Drilling Program (IODP) site U1358 on the Adélie Land continental shelf. The warmer than present conditions of the early Pliocene coupled with the site's proximity to the landward sloping Wilkes Subglacial Basin provided the rationale for the investigations at this site. Based on visual core descriptions, particle size distributions, and major and trace element ratios, we interpret the origin of lower Pliocene strata by intermittent glaciomarine sedimentation with open-marine conditions and extensive glacial advances to the outer shelf. Heavy mineral analyses show that sand-sized detritus in the lower Pliocene strata was sourced from local intermediate to high-grade metamorphic rocks near Mertz Glacier. In contrast, Pleistocene diamictons exhibit a larger contribution from a prehnite-pumpellyite greenschist facies suggesting supply via iceberg rafting from northern Victoria Land. From this sedimentological evidence, we postulate a shift from a dynamic EAIS margin in the early Pliocene to possible stabilization in the Pleistocene. |
format |
Article in Journal/Newspaper |
author |
Orejola, Nadine Passchier, Sandra Brinkhuis, Hendrik Escutia Dotti, Carlota Klaus, Adam Fehr, Annick Williams, Trevor Bendle, James AP Bijl, Peter K Bohaty, Steven M Carr, Stephanie A Dunbar, Robert B Flores, Jose-Abel Gonzalez, Jhon J Hayden, Travis G Iwai, Masao Jimenez-Espejo, Francisco J Katsuki, Kota Kong, Gee Soo McKay, Robert M Nakai, Mutsumi Olney, Matthew P Pekar, Stephen F Pross, Joerg Riesselman, Christina Roehl, Ursula Sakai, Toyosaburo Shrivastava, Prakash Kumar Stickley, Catherine E Sugisaki, Saiko Tauxe, Lisa Tuo, Shouting van de Flierdt, Tina Welsh, Kevin Yamane, Masako Scientists, Iodp Expedition 318 |
author_facet |
Orejola, Nadine Passchier, Sandra Brinkhuis, Hendrik Escutia Dotti, Carlota Klaus, Adam Fehr, Annick Williams, Trevor Bendle, James AP Bijl, Peter K Bohaty, Steven M Carr, Stephanie A Dunbar, Robert B Flores, Jose-Abel Gonzalez, Jhon J Hayden, Travis G Iwai, Masao Jimenez-Espejo, Francisco J Katsuki, Kota Kong, Gee Soo McKay, Robert M Nakai, Mutsumi Olney, Matthew P Pekar, Stephen F Pross, Joerg Riesselman, Christina Roehl, Ursula Sakai, Toyosaburo Shrivastava, Prakash Kumar Stickley, Catherine E Sugisaki, Saiko Tauxe, Lisa Tuo, Shouting van de Flierdt, Tina Welsh, Kevin Yamane, Masako Scientists, Iodp Expedition 318 |
author_sort |
Orejola, Nadine |
title |
Sedimentology of lower Pliocene to Upper Pleistocene diamictons from IODP Site U1358, Wilkes Land margin, and implications for East Antarctic Ice Sheet dynamics |
title_short |
Sedimentology of lower Pliocene to Upper Pleistocene diamictons from IODP Site U1358, Wilkes Land margin, and implications for East Antarctic Ice Sheet dynamics |
title_full |
Sedimentology of lower Pliocene to Upper Pleistocene diamictons from IODP Site U1358, Wilkes Land margin, and implications for East Antarctic Ice Sheet dynamics |
title_fullStr |
Sedimentology of lower Pliocene to Upper Pleistocene diamictons from IODP Site U1358, Wilkes Land margin, and implications for East Antarctic Ice Sheet dynamics |
title_full_unstemmed |
Sedimentology of lower Pliocene to Upper Pleistocene diamictons from IODP Site U1358, Wilkes Land margin, and implications for East Antarctic Ice Sheet dynamics |
title_sort |
sedimentology of lower pliocene to upper pleistocene diamictons from iodp site u1358, wilkes land margin, and implications for east antarctic ice sheet dynamics |
publisher |
eScholarship, University of California |
publishDate |
2014 |
url |
https://escholarship.org/uc/item/9953d634 |
op_coverage |
183 - 192 |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(145.000,145.000,-75.000,-75.000) |
geographic |
Antarctic East Antarctic Ice Sheet Mertz Glacier Victoria Land Wilkes Land Wilkes Subglacial Basin |
geographic_facet |
Antarctic East Antarctic Ice Sheet Mertz Glacier Victoria Land Wilkes Land Wilkes Subglacial Basin |
genre |
Antarc* Antarctic Antarctic Science Ice Sheet Iceberg* Mertz Glacier Victoria Land Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctic Science Ice Sheet Iceberg* Mertz Glacier Victoria Land Wilkes Land |
op_source |
ANTARCTIC SCIENCE, vol 26, iss 2 |
op_relation |
qt9953d634 https://escholarship.org/uc/item/9953d634 |
op_rights |
public |
_version_ |
1766126354758107136 |