A record of antarctic surface temperature between 25 and 50 m.y. ago
We present the first Antarctic terrestrial record of climate variations through the Cenozoic, based on the hydrogen isotope composition of hydrothermally altered minerals of intrusive rocks. This new record provides an independent geochemical proxy for continental climatic conditions; whereas, most...
Published in: | Geology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2011
|
Subjects: | |
Online Access: | https://research.manchester.ac.uk/en/publications/2ab15474-b892-4b8f-8980-6151f245cc2b https://doi.org/10.1130/G31569.1 http://geology.gsapubs.org/content/39/5/423.full.pdf |
id |
ftumanchesterpub:oai:pure.atira.dk:publications/2ab15474-b892-4b8f-8980-6151f245cc2b |
---|---|
record_format |
openpolar |
spelling |
ftumanchesterpub:oai:pure.atira.dk:publications/2ab15474-b892-4b8f-8980-6151f245cc2b 2023-11-12T04:08:31+01:00 A record of antarctic surface temperature between 25 and 50 m.y. ago Dallai, Luigi Burgess, Ray 2011-05 https://research.manchester.ac.uk/en/publications/2ab15474-b892-4b8f-8980-6151f245cc2b https://doi.org/10.1130/G31569.1 http://geology.gsapubs.org/content/39/5/423.full.pdf eng eng info:eu-repo/semantics/closedAccess Dallai , L & Burgess , R 2011 , ' A record of antarctic surface temperature between 25 and 50 m.y. ago ' , Geology , vol. 39 , no. 5 , pp. 423-426 . https://doi.org/10.1130/G31569.1 article 2011 ftumanchesterpub https://doi.org/10.1130/G31569.1 2023-10-30T09:18:11Z We present the first Antarctic terrestrial record of climate variations through the Cenozoic, based on the hydrogen isotope composition of hydrothermally altered minerals of intrusive rocks. This new record provides an independent geochemical proxy for continental climatic conditions; whereas, most land surface temperature proxies are biological. The temperature record is consistent with the range predicted by global climate models and proxy records for glacial and pre-glacial conditions in the Ross Sea region of Antarctica. The combined stable isotope (O and H) and age (40Ar-39Ar) determinations of hydrous mineral from Cenozoic igneous plutons and dikes show that the protracted time scale of magmatic activity and extensive hydrothermal exchange with local meteoric waters has preserved a semiquantitative climate signal of intervals in which atmospheric temperatures significantly fluctuated. These data also reveal that glacial episodes comparable with current polar conditions occurred repeatedly prior to geographical and thermal isolation of the Antarctic continent. © 2011 Geological Society of America. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea The University of Manchester: Research Explorer Antarctic Ross Sea The Antarctic Geology 39 5 423 426 |
institution |
Open Polar |
collection |
The University of Manchester: Research Explorer |
op_collection_id |
ftumanchesterpub |
language |
English |
description |
We present the first Antarctic terrestrial record of climate variations through the Cenozoic, based on the hydrogen isotope composition of hydrothermally altered minerals of intrusive rocks. This new record provides an independent geochemical proxy for continental climatic conditions; whereas, most land surface temperature proxies are biological. The temperature record is consistent with the range predicted by global climate models and proxy records for glacial and pre-glacial conditions in the Ross Sea region of Antarctica. The combined stable isotope (O and H) and age (40Ar-39Ar) determinations of hydrous mineral from Cenozoic igneous plutons and dikes show that the protracted time scale of magmatic activity and extensive hydrothermal exchange with local meteoric waters has preserved a semiquantitative climate signal of intervals in which atmospheric temperatures significantly fluctuated. These data also reveal that glacial episodes comparable with current polar conditions occurred repeatedly prior to geographical and thermal isolation of the Antarctic continent. © 2011 Geological Society of America. |
format |
Article in Journal/Newspaper |
author |
Dallai, Luigi Burgess, Ray |
spellingShingle |
Dallai, Luigi Burgess, Ray A record of antarctic surface temperature between 25 and 50 m.y. ago |
author_facet |
Dallai, Luigi Burgess, Ray |
author_sort |
Dallai, Luigi |
title |
A record of antarctic surface temperature between 25 and 50 m.y. ago |
title_short |
A record of antarctic surface temperature between 25 and 50 m.y. ago |
title_full |
A record of antarctic surface temperature between 25 and 50 m.y. ago |
title_fullStr |
A record of antarctic surface temperature between 25 and 50 m.y. ago |
title_full_unstemmed |
A record of antarctic surface temperature between 25 and 50 m.y. ago |
title_sort |
record of antarctic surface temperature between 25 and 50 m.y. ago |
publishDate |
2011 |
url |
https://research.manchester.ac.uk/en/publications/2ab15474-b892-4b8f-8980-6151f245cc2b https://doi.org/10.1130/G31569.1 http://geology.gsapubs.org/content/39/5/423.full.pdf |
geographic |
Antarctic Ross Sea The Antarctic |
geographic_facet |
Antarctic Ross Sea The Antarctic |
genre |
Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea |
op_source |
Dallai , L & Burgess , R 2011 , ' A record of antarctic surface temperature between 25 and 50 m.y. ago ' , Geology , vol. 39 , no. 5 , pp. 423-426 . https://doi.org/10.1130/G31569.1 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1130/G31569.1 |
container_title |
Geology |
container_volume |
39 |
container_issue |
5 |
container_start_page |
423 |
op_container_end_page |
426 |
_version_ |
1782328796141060096 |