Widespread Antarctic glaciation during the Late Eocene
Marine sedimentary rocks drilled on the southeastern margin of the South Orkney microcontinent in Antarctica (Ocean Drilling Program Leg 113 Site 696) were deposited between ∼36.5 Ma to 33.6 Ma, across the Eocene–Oligocene climate transition. The recovered rocks contain abundant grains exhibiting me...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:1529747 2023-12-24T10:11:30+01:00 Widespread Antarctic glaciation during the Late Eocene Carter, A Riley, TR Hillenbrand, C-D Rittner, M 2017-01-15 text https://discovery.ucl.ac.uk/id/eprint/1529747/1/Carter_Widespread%20Antarctic%20glaciation%20during%20the%20Late%20Eocene.pdf https://discovery.ucl.ac.uk/id/eprint/1529747/ eng eng https://discovery.ucl.ac.uk/id/eprint/1529747/1/Carter_Widespread%20Antarctic%20glaciation%20during%20the%20Late%20Eocene.pdf https://discovery.ucl.ac.uk/id/eprint/1529747/ open Earth and Planetary Science Letters , 458 pp. 49-57. (2017) Eocene–Oligocene transition Antarctica glaciation IRD provenance Article 2017 ftucl 2023-11-27T13:07:37Z Marine sedimentary rocks drilled on the southeastern margin of the South Orkney microcontinent in Antarctica (Ocean Drilling Program Leg 113 Site 696) were deposited between ∼36.5 Ma to 33.6 Ma, across the Eocene–Oligocene climate transition. The recovered rocks contain abundant grains exhibiting mechanical features diagnostic of iceberg-rafted debris. Sand provenance based on a multi-proxy approach that included petrographic analysis of over 275,000 grains, detrital zircon geochronology and apatite thermochronometry rule out local sources (Antarctic Peninsula or the South Orkney Islands) for the material. Instead the ice-transported grains show a clear provenance from the southern Weddell Sea region, extending from the Ellsworth–Whitmore Mountains of West Antarctica to the coastal region of Dronning Maud Land in East Antarctica. This study provides the first evidence for a continuity of widespread glacier calving along the coastline of the southern Weddell Sea embayment at least 2.5 million yrs before the prominent oxygen isotope event at 34–33.5 Ma that is considered to mark the onset of widespread glaciation of the Antarctic continent. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica Iceberg* South Orkney Islands Weddell Sea West Antarctica University College London: UCL Discovery Antarctic Antarctic Peninsula Dronning Maud Land East Antarctica South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) The Antarctic Weddell Weddell Sea West Antarctica Whitmore Mountains ENVELOPE(-104.000,-104.000,-82.500,-82.500) |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Eocene–Oligocene transition Antarctica glaciation IRD provenance |
spellingShingle |
Eocene–Oligocene transition Antarctica glaciation IRD provenance Carter, A Riley, TR Hillenbrand, C-D Rittner, M Widespread Antarctic glaciation during the Late Eocene |
topic_facet |
Eocene–Oligocene transition Antarctica glaciation IRD provenance |
description |
Marine sedimentary rocks drilled on the southeastern margin of the South Orkney microcontinent in Antarctica (Ocean Drilling Program Leg 113 Site 696) were deposited between ∼36.5 Ma to 33.6 Ma, across the Eocene–Oligocene climate transition. The recovered rocks contain abundant grains exhibiting mechanical features diagnostic of iceberg-rafted debris. Sand provenance based on a multi-proxy approach that included petrographic analysis of over 275,000 grains, detrital zircon geochronology and apatite thermochronometry rule out local sources (Antarctic Peninsula or the South Orkney Islands) for the material. Instead the ice-transported grains show a clear provenance from the southern Weddell Sea region, extending from the Ellsworth–Whitmore Mountains of West Antarctica to the coastal region of Dronning Maud Land in East Antarctica. This study provides the first evidence for a continuity of widespread glacier calving along the coastline of the southern Weddell Sea embayment at least 2.5 million yrs before the prominent oxygen isotope event at 34–33.5 Ma that is considered to mark the onset of widespread glaciation of the Antarctic continent. |
format |
Article in Journal/Newspaper |
author |
Carter, A Riley, TR Hillenbrand, C-D Rittner, M |
author_facet |
Carter, A Riley, TR Hillenbrand, C-D Rittner, M |
author_sort |
Carter, A |
title |
Widespread Antarctic glaciation during the Late Eocene |
title_short |
Widespread Antarctic glaciation during the Late Eocene |
title_full |
Widespread Antarctic glaciation during the Late Eocene |
title_fullStr |
Widespread Antarctic glaciation during the Late Eocene |
title_full_unstemmed |
Widespread Antarctic glaciation during the Late Eocene |
title_sort |
widespread antarctic glaciation during the late eocene |
publishDate |
2017 |
url |
https://discovery.ucl.ac.uk/id/eprint/1529747/1/Carter_Widespread%20Antarctic%20glaciation%20during%20the%20Late%20Eocene.pdf https://discovery.ucl.ac.uk/id/eprint/1529747/ |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-104.000,-104.000,-82.500,-82.500) |
geographic |
Antarctic Antarctic Peninsula Dronning Maud Land East Antarctica South Orkney Islands The Antarctic Weddell Weddell Sea West Antarctica Whitmore Mountains |
geographic_facet |
Antarctic Antarctic Peninsula Dronning Maud Land East Antarctica South Orkney Islands The Antarctic Weddell Weddell Sea West Antarctica Whitmore Mountains |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica Iceberg* South Orkney Islands Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica Iceberg* South Orkney Islands Weddell Sea West Antarctica |
op_source |
Earth and Planetary Science Letters , 458 pp. 49-57. (2017) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/1529747/1/Carter_Widespread%20Antarctic%20glaciation%20during%20the%20Late%20Eocene.pdf https://discovery.ucl.ac.uk/id/eprint/1529747/ |
op_rights |
open |
_version_ |
1786166079779766272 |