The age and origin of the central Scotia Sea
Opening of the Drake Passage gateway between the Pacific and Atlantic oceans has been linked in various ways to Cenozoic climate changes. From the oceanic floor of Drake Passage, the largest of the remaining uncertainties in understanding this opening is in the timing and process of the opening of t...
Published in: | Geophysical Journal International |
---|---|
Main Author: | |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
2010
|
Subjects: | |
Online Access: | http://gji.oxfordjournals.org/cgi/content/short/183/2/587 https://doi.org/10.1111/j.1365-246X.2010.04781.x |
id |
fthighwire:oai:open-archive.highwire.org:gji:183/2/587 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:gji:183/2/587 2023-05-15T13:57:12+02:00 The age and origin of the central Scotia Sea Eagles, Graeme 2010-11-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/183/2/587 https://doi.org/10.1111/j.1365-246X.2010.04781.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/183/2/587 http://dx.doi.org/10.1111/j.1365-246X.2010.04781.x Copyright (C) 2010, Oxford University Press Geodynamics and Tectonics TEXT 2010 fthighwire https://doi.org/10.1111/j.1365-246X.2010.04781.x 2016-11-16T18:47:49Z Opening of the Drake Passage gateway between the Pacific and Atlantic oceans has been linked in various ways to Cenozoic climate changes. From the oceanic floor of Drake Passage, the largest of the remaining uncertainties in understanding this opening is in the timing and process of the opening of the central Scotia Sea. All but one of the available constraints on the age of the central Scotia Sea is diagnostic of, or consistent with, a Mesozoic age. Comparison of tectonic and magnetic features on the seafloor with plate kinematic models shows that it is likely to have accreted to a mid-ocean ridge between the South American and Antarctic plates following their separation in Jurassic times. Subsequent regional shallowing may be related to subduction-related processes that preceded backarc extension in the East Scotia Sea. The presence of a fragment of Jurassic–Cretaceous ocean floor in the gateway implies that deep water connections through the Scotia Sea basin complex may have been possible since Eocene times when the continental tips of South America and the Antarctic Peninsula first passed each other. Text Antarc* Antarctic Antarctic Peninsula Drake Passage Scotia Sea HighWire Press (Stanford University) Antarctic The Antarctic Antarctic Peninsula Drake Passage Scotia Sea Pacific Geophysical Journal International 183 2 587 600 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Geodynamics and Tectonics |
spellingShingle |
Geodynamics and Tectonics Eagles, Graeme The age and origin of the central Scotia Sea |
topic_facet |
Geodynamics and Tectonics |
description |
Opening of the Drake Passage gateway between the Pacific and Atlantic oceans has been linked in various ways to Cenozoic climate changes. From the oceanic floor of Drake Passage, the largest of the remaining uncertainties in understanding this opening is in the timing and process of the opening of the central Scotia Sea. All but one of the available constraints on the age of the central Scotia Sea is diagnostic of, or consistent with, a Mesozoic age. Comparison of tectonic and magnetic features on the seafloor with plate kinematic models shows that it is likely to have accreted to a mid-ocean ridge between the South American and Antarctic plates following their separation in Jurassic times. Subsequent regional shallowing may be related to subduction-related processes that preceded backarc extension in the East Scotia Sea. The presence of a fragment of Jurassic–Cretaceous ocean floor in the gateway implies that deep water connections through the Scotia Sea basin complex may have been possible since Eocene times when the continental tips of South America and the Antarctic Peninsula first passed each other. |
format |
Text |
author |
Eagles, Graeme |
author_facet |
Eagles, Graeme |
author_sort |
Eagles, Graeme |
title |
The age and origin of the central Scotia Sea |
title_short |
The age and origin of the central Scotia Sea |
title_full |
The age and origin of the central Scotia Sea |
title_fullStr |
The age and origin of the central Scotia Sea |
title_full_unstemmed |
The age and origin of the central Scotia Sea |
title_sort |
age and origin of the central scotia sea |
publisher |
Oxford University Press |
publishDate |
2010 |
url |
http://gji.oxfordjournals.org/cgi/content/short/183/2/587 https://doi.org/10.1111/j.1365-246X.2010.04781.x |
geographic |
Antarctic The Antarctic Antarctic Peninsula Drake Passage Scotia Sea Pacific |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Drake Passage Scotia Sea Pacific |
genre |
Antarc* Antarctic Antarctic Peninsula Drake Passage Scotia Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Drake Passage Scotia Sea |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/183/2/587 http://dx.doi.org/10.1111/j.1365-246X.2010.04781.x |
op_rights |
Copyright (C) 2010, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.2010.04781.x |
container_title |
Geophysical Journal International |
container_volume |
183 |
container_issue |
2 |
container_start_page |
587 |
op_container_end_page |
600 |
_version_ |
1766264807222149120 |