A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum
A series of distinct glacial deposits flanking the margins of the upper Hatherton Glacier, an outlet glacier in the central Transantarctic Mountains, are used to constrain the behaviour of the Antarctic ice-sheets. Cosmogenic exposure ages of 18 erratics from four glacial drifts covering the ice fre...
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ftansto:oai:apo-prod.ansto.gov.au:10238/6064 2023-05-15T13:36:16+02:00 A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum Joy, K Fink, D Storey, B Atkins, C 2014-11-25 http://apo.ansto.gov.au/dspace/handle/10238/6064 https://doi.org/10.1016/j.quascirev.2013.10.028 en eng Pergamon-Elsevier Science Ltd Joy, K., Fink, D., Storey, B., & Atkins, C. (2014). A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum. Quaternary Science Reviews, 83, 46-57. doi:10.1016/j.quascirev.2013.10.028 0277-3791 http://dx.doi.org/10.1016/j.quascirev.2013.10.028 http://apo.ansto.gov.au/dspace/handle/10238/6064 Glaciers Antarctica Ice Beryllium 10 Alumnium 26 New Zealand Journal Article 2014 ftansto https://doi.org/10.1016/j.quascirev.2013.10.028 2020-04-27T22:28:54Z A series of distinct glacial deposits flanking the margins of the upper Hatherton Glacier, an outlet glacier in the central Transantarctic Mountains, are used to constrain the behaviour of the Antarctic ice-sheets. Cosmogenic exposure ages of 18 erratics from four glacial drifts covering the ice free Dubris and Bibra valleys, range in age from 5 to 1997 ka. Our results document four glacial advance and retreat events superimposed on an overall long-term ice thickness reduction of about 500 m since the mid-Pleistocene. The lack of field evidence and absence of LGM exposure ages in the glacial deposits of the Hatherton Glacier supports our conclusion that at the LGM the East Antarctic Ice Sheet was of similar size, or may have been slightly smaller, than present. Minimum exposure ages from the oldest two glacial events, represented by the Isca and Danum drifts, are similar to 1-2 Ma and similar to 0.5 Ma respectively. The Britannia-II Drift, previously assumed to mark the maximum extent of the Last Glacial Maximum advance, has a mean Be-10 age of 126 +/- 3.2 ka (n = 5). Ages from the younger Britannia-I Drift suggest that since the mid-Holocene (6.5 +/- 1.2 ka, n = 5), approximately 200 m of additional ice has been lost. © 2014, Elsevier Ltd. Article in Journal/Newspaper Antarc* Antarctic Antarctica Hatherton Glacier Ice Sheet Australian Nuclear Science and Technology Organisation: ANSTO Publications Online Antarctic Britannia ENVELOPE(-62.681,-62.681,-64.718,-64.718) East Antarctic Ice Sheet Hatherton Glacier ENVELOPE(157.583,157.583,-79.917,-79.917) New Zealand The Antarctic Transantarctic Mountains Quaternary Science Reviews 83 46 57 |
institution |
Open Polar |
collection |
Australian Nuclear Science and Technology Organisation: ANSTO Publications Online |
op_collection_id |
ftansto |
language |
English |
topic |
Glaciers Antarctica Ice Beryllium 10 Alumnium 26 New Zealand |
spellingShingle |
Glaciers Antarctica Ice Beryllium 10 Alumnium 26 New Zealand Joy, K Fink, D Storey, B Atkins, C A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum |
topic_facet |
Glaciers Antarctica Ice Beryllium 10 Alumnium 26 New Zealand |
description |
A series of distinct glacial deposits flanking the margins of the upper Hatherton Glacier, an outlet glacier in the central Transantarctic Mountains, are used to constrain the behaviour of the Antarctic ice-sheets. Cosmogenic exposure ages of 18 erratics from four glacial drifts covering the ice free Dubris and Bibra valleys, range in age from 5 to 1997 ka. Our results document four glacial advance and retreat events superimposed on an overall long-term ice thickness reduction of about 500 m since the mid-Pleistocene. The lack of field evidence and absence of LGM exposure ages in the glacial deposits of the Hatherton Glacier supports our conclusion that at the LGM the East Antarctic Ice Sheet was of similar size, or may have been slightly smaller, than present. Minimum exposure ages from the oldest two glacial events, represented by the Isca and Danum drifts, are similar to 1-2 Ma and similar to 0.5 Ma respectively. The Britannia-II Drift, previously assumed to mark the maximum extent of the Last Glacial Maximum advance, has a mean Be-10 age of 126 +/- 3.2 ka (n = 5). Ages from the younger Britannia-I Drift suggest that since the mid-Holocene (6.5 +/- 1.2 ka, n = 5), approximately 200 m of additional ice has been lost. © 2014, Elsevier Ltd. |
format |
Article in Journal/Newspaper |
author |
Joy, K Fink, D Storey, B Atkins, C |
author_facet |
Joy, K Fink, D Storey, B Atkins, C |
author_sort |
Joy, K |
title |
A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum |
title_short |
A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum |
title_full |
A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum |
title_fullStr |
A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum |
title_full_unstemmed |
A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum |
title_sort |
2 million year glacial chronology of the hatherton glacier, antarctica and implications for the size of the east antarctic ice sheet at the last glacial maximum |
publisher |
Pergamon-Elsevier Science Ltd |
publishDate |
2014 |
url |
http://apo.ansto.gov.au/dspace/handle/10238/6064 https://doi.org/10.1016/j.quascirev.2013.10.028 |
long_lat |
ENVELOPE(-62.681,-62.681,-64.718,-64.718) ENVELOPE(157.583,157.583,-79.917,-79.917) |
geographic |
Antarctic Britannia East Antarctic Ice Sheet Hatherton Glacier New Zealand The Antarctic Transantarctic Mountains |
geographic_facet |
Antarctic Britannia East Antarctic Ice Sheet Hatherton Glacier New Zealand The Antarctic Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctica Hatherton Glacier Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Hatherton Glacier Ice Sheet |
op_relation |
Joy, K., Fink, D., Storey, B., & Atkins, C. (2014). A 2 million year glacial chronology of the Hatherton Glacier, Antarctica and implications for the size of the East Antarctic Ice Sheet at the Last Glacial Maximum. Quaternary Science Reviews, 83, 46-57. doi:10.1016/j.quascirev.2013.10.028 0277-3791 http://dx.doi.org/10.1016/j.quascirev.2013.10.028 http://apo.ansto.gov.au/dspace/handle/10238/6064 |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.10.028 |
container_title |
Quaternary Science Reviews |
container_volume |
83 |
container_start_page |
46 |
op_container_end_page |
57 |
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1766076218597179392 |