South Georgia and Gondwana's Pacific Margin: Lost in translation?
The geology of South Georgia has long been interpreted as the product of processes acting at the Pacific margin of Gondwana in Jurassic and earlier times. This placement requires 1600 km of translation of South Georgia to its present location, for half of which there is no evidence. Assuming this me...
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Online Access: | https://epic.awi.de/id/eprint/33238/ https://epic.awi.de/id/eprint/33238/1/Eagles_SGeorgia2010.pdf https://doi.org/10.1016/j.jsames.2010.04.004 https://hdl.handle.net/10013/epic.41726 https://hdl.handle.net/10013/epic.41726.d001 |
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ftawi:oai:epic.awi.de:33238 2024-09-15T18:04:00+00:00 South Georgia and Gondwana's Pacific Margin: Lost in translation? Eagles, Graeme 2010 application/pdf https://epic.awi.de/id/eprint/33238/ https://epic.awi.de/id/eprint/33238/1/Eagles_SGeorgia2010.pdf https://doi.org/10.1016/j.jsames.2010.04.004 https://hdl.handle.net/10013/epic.41726 https://hdl.handle.net/10013/epic.41726.d001 unknown https://epic.awi.de/id/eprint/33238/1/Eagles_SGeorgia2010.pdf https://hdl.handle.net/10013/epic.41726.d001 Eagles, G. (2010) South Georgia and Gondwana's Pacific Margin: Lost in translation? , Journal of South American Earth Sciences, 30 (2), pp. 65-70 . doi:10.1016/j.jsames.2010.04.004 <https://doi.org/10.1016/j.jsames.2010.04.004> , hdl:10013/epic.41726 EPIC3Journal of South American Earth Sciences, 30(2), pp. 65-70, ISSN: 08959811 Article peerRev 2010 ftawi https://doi.org/10.1016/j.jsames.2010.04.004 2024-06-24T04:07:26Z The geology of South Georgia has long been interpreted as the product of processes acting at the Pacific margin of Gondwana in Jurassic and earlier times. This placement requires 1600 km of translation of South Georgia to its present location, for half of which there is no evidence. Assuming this means that 800 km of the translation cannot have occurred, it requires that those processes acted at a location much further east, within the interior of Gondwana. One such location could have been at the southern edge of the Deseado Terrane, which collided and sutured with Gondwana in Carboniferous times. Later, in this location, South Georgia would have experienced shearing and extension during the earliest stages of breakup of the supercontinent, eventually to form part of the ensuing ocean's northern margin. These, or possibly more recent tectonic events on the lengthening northern margin of the Scotia Sea, led to the northward obduction of ophiolitic rocks onto the island. A history like this reduces South Georgia to a peripheral role in the paleoceanographic development of Drake Passage, and strengthens the case for Eocene connection between the Pacific and Atlantic oceans. Article in Journal/Newspaper Drake Passage Scotia Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of South American Earth Sciences 30 2 65 70 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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The geology of South Georgia has long been interpreted as the product of processes acting at the Pacific margin of Gondwana in Jurassic and earlier times. This placement requires 1600 km of translation of South Georgia to its present location, for half of which there is no evidence. Assuming this means that 800 km of the translation cannot have occurred, it requires that those processes acted at a location much further east, within the interior of Gondwana. One such location could have been at the southern edge of the Deseado Terrane, which collided and sutured with Gondwana in Carboniferous times. Later, in this location, South Georgia would have experienced shearing and extension during the earliest stages of breakup of the supercontinent, eventually to form part of the ensuing ocean's northern margin. These, or possibly more recent tectonic events on the lengthening northern margin of the Scotia Sea, led to the northward obduction of ophiolitic rocks onto the island. A history like this reduces South Georgia to a peripheral role in the paleoceanographic development of Drake Passage, and strengthens the case for Eocene connection between the Pacific and Atlantic oceans. |
format |
Article in Journal/Newspaper |
author |
Eagles, Graeme |
spellingShingle |
Eagles, Graeme South Georgia and Gondwana's Pacific Margin: Lost in translation? |
author_facet |
Eagles, Graeme |
author_sort |
Eagles, Graeme |
title |
South Georgia and Gondwana's Pacific Margin: Lost in translation? |
title_short |
South Georgia and Gondwana's Pacific Margin: Lost in translation? |
title_full |
South Georgia and Gondwana's Pacific Margin: Lost in translation? |
title_fullStr |
South Georgia and Gondwana's Pacific Margin: Lost in translation? |
title_full_unstemmed |
South Georgia and Gondwana's Pacific Margin: Lost in translation? |
title_sort |
south georgia and gondwana's pacific margin: lost in translation? |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/33238/ https://epic.awi.de/id/eprint/33238/1/Eagles_SGeorgia2010.pdf https://doi.org/10.1016/j.jsames.2010.04.004 https://hdl.handle.net/10013/epic.41726 https://hdl.handle.net/10013/epic.41726.d001 |
genre |
Drake Passage Scotia Sea |
genre_facet |
Drake Passage Scotia Sea |
op_source |
EPIC3Journal of South American Earth Sciences, 30(2), pp. 65-70, ISSN: 08959811 |
op_relation |
https://epic.awi.de/id/eprint/33238/1/Eagles_SGeorgia2010.pdf https://hdl.handle.net/10013/epic.41726.d001 Eagles, G. (2010) South Georgia and Gondwana's Pacific Margin: Lost in translation? , Journal of South American Earth Sciences, 30 (2), pp. 65-70 . doi:10.1016/j.jsames.2010.04.004 <https://doi.org/10.1016/j.jsames.2010.04.004> , hdl:10013/epic.41726 |
op_doi |
https://doi.org/10.1016/j.jsames.2010.04.004 |
container_title |
Journal of South American Earth Sciences |
container_volume |
30 |
container_issue |
2 |
container_start_page |
65 |
op_container_end_page |
70 |
_version_ |
1810441483647451136 |