A mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula: implications for terrane accretion timing and Gondwana palaeolatitudes
New structural and age data suggest that West Gondwana may have been at lower palaeolatitudes than previously interpreted from Albian sequences in Gondwana marginal suspect terranes. The Palmer Land event, which juxtaposed Mesozoic terranes on the Gondwana margin, deformed granitoids in the southern...
Published in: | Journal of the Geological Society |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Geological Society of London
|
Subjects: | |
Online Access: | http://hdl.handle.net/1885/92577 https://doi.org/10.1144/0016-764901-090 https://openresearch-repository.anu.edu.au/bitstream/1885/92577/7/MigratedxPub23701_RSD_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/9/MigratedxPub23701_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/11/01_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/13/02_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg |
id |
ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/92577 |
---|---|
record_format |
openpolar |
spelling |
ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/92577 2024-01-14T10:01:40+01:00 A mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula: implications for terrane accretion timing and Gondwana palaeolatitudes Vaughn, A P M Pankhurst, Robert J Fanning, Christopher http://hdl.handle.net/1885/92577 https://doi.org/10.1144/0016-764901-090 https://openresearch-repository.anu.edu.au/bitstream/1885/92577/7/MigratedxPub23701_RSD_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/9/MigratedxPub23701_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/11/01_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/13/02_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg unknown Geological Society of London 0016-7649 http://hdl.handle.net/1885/92577 doi:10.1144/0016-764901-090 https://openresearch-repository.anu.edu.au/bitstream/1885/92577/7/MigratedxPub23701_RSD_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/9/MigratedxPub23701_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/11/01_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/13/02_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg Journal of the Geological Society Keywords: Cretaceous dating method Gondwana granite paleoclimate paleolatitude plate motion Antarctica Gondwana Palaeolatitude Superplumes West Antarctic Journal article ftanucanberra https://doi.org/10.1144/0016-764901-090 2023-12-15T09:34:28Z New structural and age data suggest that West Gondwana may have been at lower palaeolatitudes than previously interpreted from Albian sequences in Gondwana marginal suspect terranes. The Palmer Land event, which juxtaposed Mesozoic terranes on the Gondwana margin, deformed granitoids in the southern Antarctic Peninsula. U-Pb SHRIMP dating of zircons from a microgranite dyke yields a crystallization age of 106.9 ± 1.1 Ma. This result and re-interpretation of the structural position of another granite pluton date the Palmer Land event, and probable terrane collision, as late Early Cretaceous, and not latest Jurassic as formerly interpreted. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Palmer Land Australian National University: ANU Digital Collections Antarctic Antarctic Peninsula Palmer Land ENVELOPE(-65.000,-65.000,-71.500,-71.500) Journal of the Geological Society 159 2 113 116 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Cretaceous dating method Gondwana granite paleoclimate paleolatitude plate motion Antarctica Gondwana Palaeolatitude Superplumes West Antarctic |
spellingShingle |
Keywords: Cretaceous dating method Gondwana granite paleoclimate paleolatitude plate motion Antarctica Gondwana Palaeolatitude Superplumes West Antarctic Vaughn, A P M Pankhurst, Robert J Fanning, Christopher A mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula: implications for terrane accretion timing and Gondwana palaeolatitudes |
topic_facet |
Keywords: Cretaceous dating method Gondwana granite paleoclimate paleolatitude plate motion Antarctica Gondwana Palaeolatitude Superplumes West Antarctic |
description |
New structural and age data suggest that West Gondwana may have been at lower palaeolatitudes than previously interpreted from Albian sequences in Gondwana marginal suspect terranes. The Palmer Land event, which juxtaposed Mesozoic terranes on the Gondwana margin, deformed granitoids in the southern Antarctic Peninsula. U-Pb SHRIMP dating of zircons from a microgranite dyke yields a crystallization age of 106.9 ± 1.1 Ma. This result and re-interpretation of the structural position of another granite pluton date the Palmer Land event, and probable terrane collision, as late Early Cretaceous, and not latest Jurassic as formerly interpreted. |
format |
Article in Journal/Newspaper |
author |
Vaughn, A P M Pankhurst, Robert J Fanning, Christopher |
author_facet |
Vaughn, A P M Pankhurst, Robert J Fanning, Christopher |
author_sort |
Vaughn, A P M |
title |
A mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula: implications for terrane accretion timing and Gondwana palaeolatitudes |
title_short |
A mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula: implications for terrane accretion timing and Gondwana palaeolatitudes |
title_full |
A mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula: implications for terrane accretion timing and Gondwana palaeolatitudes |
title_fullStr |
A mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula: implications for terrane accretion timing and Gondwana palaeolatitudes |
title_full_unstemmed |
A mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula: implications for terrane accretion timing and Gondwana palaeolatitudes |
title_sort |
mid-cretaceous age for the palmer land event, antarctic peninsula: implications for terrane accretion timing and gondwana palaeolatitudes |
publisher |
Geological Society of London |
url |
http://hdl.handle.net/1885/92577 https://doi.org/10.1144/0016-764901-090 https://openresearch-repository.anu.edu.au/bitstream/1885/92577/7/MigratedxPub23701_RSD_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/9/MigratedxPub23701_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/11/01_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/13/02_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg |
long_lat |
ENVELOPE(-65.000,-65.000,-71.500,-71.500) |
geographic |
Antarctic Antarctic Peninsula Palmer Land |
geographic_facet |
Antarctic Antarctic Peninsula Palmer Land |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Palmer Land |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Palmer Land |
op_source |
Journal of the Geological Society |
op_relation |
0016-7649 http://hdl.handle.net/1885/92577 doi:10.1144/0016-764901-090 https://openresearch-repository.anu.edu.au/bitstream/1885/92577/7/MigratedxPub23701_RSD_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/9/MigratedxPub23701_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/11/01_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/92577/13/02_Vaughn_A_mid-Cretaceous_age_for_the_2002.pdf.jpg |
op_doi |
https://doi.org/10.1144/0016-764901-090 |
container_title |
Journal of the Geological Society |
container_volume |
159 |
container_issue |
2 |
container_start_page |
113 |
op_container_end_page |
116 |
_version_ |
1788067425019756544 |