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...
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| Format: | Article in Journal/Newspaper |
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Geological Society of London
2015
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| Online Access: | http://hdl.handle.net/1885/92577 |
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/92577 |
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/92577 2023-05-15T13:35:18+02:00 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 2015-12-13T23:25:14Z http://hdl.handle.net/1885/92577 unknown Geological Society of London 0016-7649 http://hdl.handle.net/1885/92577 Journal of the Geological Society Keywords: Cretaceous dating method Gondwana granite paleoclimate paleolatitude plate motion Antarctica Gondwana Palaeolatitude Superplumes West Antarctic Journal article 2015 ftanucanberra 2015-12-28T23:39:56Z 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) |
| 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 |
| publishDate |
2015 |
| url |
http://hdl.handle.net/1885/92577 |
| 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 |
| _version_ |
1766064010861477888 |