Cenozoic volcanism in the Antarctic
With the cessation of subduction along the western margin of Antarctica, Mesozoic calc-alkaline activity gradually gave way in the Genozoic to more alkaline volcanism associated with an extensional regime. Gale-alkaline volcanism persisted well into the Tertiary in the South Shetland Islands and has...
Published in: | Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
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1977
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Online Access: | http://dx.doi.org/10.1098/rstb.1977.0078 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1977.0078 |
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crroyalsociety:10.1098/rstb.1977.0078 2024-09-15T17:41:33+00:00 Cenozoic volcanism in the Antarctic 1977 http://dx.doi.org/10.1098/rstb.1977.0078 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1977.0078 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 279, issue 963, page 131-142 ISSN 0080-4622 2054-0280 journal-article 1977 crroyalsociety https://doi.org/10.1098/rstb.1977.0078 2024-07-29T04:23:22Z With the cessation of subduction along the western margin of Antarctica, Mesozoic calc-alkaline activity gradually gave way in the Genozoic to more alkaline volcanism associated with an extensional regime. Gale-alkaline volcanism persisted well into the Tertiary in the South Shetland Islands and has started to develop in the Quaternary in the South Sandwich Islands, though most of the Pliocene-Recent products of this group are of island-arc tholeiite affinity. The Genozoic volcanic rocks of the Ross Sea and Marie Byrd provinces are generally highly undersaturated basanitoids, alkali basalts and phonolites. In contrast, those of the more northerly parts of the Antarctica Peninsula and its off-lying islands are for the most part mildly alkaline or transitional. However, Paulet Island, the youngest volcano on the northeast side of the Peninsula, is distinctly more alkalic than its Pliocene predecessors. Deception Island, distinctive on account of its strongly sodic differentiates, is probably connected with residual back-arc extension along Bransfield Strait. Article in Journal/Newspaper Antarc* Antarctic Antarctica Bransfield Strait Deception Island Paulet Island Ross Sea South Sandwich Islands South Shetland Islands The Royal Society Philosophical Transactions of the Royal Society of London. B, Biological Sciences 279 963 131 142 |
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The Royal Society |
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English |
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With the cessation of subduction along the western margin of Antarctica, Mesozoic calc-alkaline activity gradually gave way in the Genozoic to more alkaline volcanism associated with an extensional regime. Gale-alkaline volcanism persisted well into the Tertiary in the South Shetland Islands and has started to develop in the Quaternary in the South Sandwich Islands, though most of the Pliocene-Recent products of this group are of island-arc tholeiite affinity. The Genozoic volcanic rocks of the Ross Sea and Marie Byrd provinces are generally highly undersaturated basanitoids, alkali basalts and phonolites. In contrast, those of the more northerly parts of the Antarctica Peninsula and its off-lying islands are for the most part mildly alkaline or transitional. However, Paulet Island, the youngest volcano on the northeast side of the Peninsula, is distinctly more alkalic than its Pliocene predecessors. Deception Island, distinctive on account of its strongly sodic differentiates, is probably connected with residual back-arc extension along Bransfield Strait. |
format |
Article in Journal/Newspaper |
title |
Cenozoic volcanism in the Antarctic |
spellingShingle |
Cenozoic volcanism in the Antarctic |
title_short |
Cenozoic volcanism in the Antarctic |
title_full |
Cenozoic volcanism in the Antarctic |
title_fullStr |
Cenozoic volcanism in the Antarctic |
title_full_unstemmed |
Cenozoic volcanism in the Antarctic |
title_sort |
cenozoic volcanism in the antarctic |
publisher |
The Royal Society |
publishDate |
1977 |
url |
http://dx.doi.org/10.1098/rstb.1977.0078 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1977.0078 |
genre |
Antarc* Antarctic Antarctica Bransfield Strait Deception Island Paulet Island Ross Sea South Sandwich Islands South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctica Bransfield Strait Deception Island Paulet Island Ross Sea South Sandwich Islands South Shetland Islands |
op_source |
Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 279, issue 963, page 131-142 ISSN 0080-4622 2054-0280 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rstb.1977.0078 |
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Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
container_volume |
279 |
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963 |
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131 |
op_container_end_page |
142 |
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1810487776443891712 |