Getting over continent ocean boundaries
The idea of a simple linear boundary between continental and oceanic crust at extended continental margins is widely recognized to be an oversimplification. Despite this, such boundaries continue to be mapped because of their perceived utility in palinspastic and plate kinematic reconstructions. To...
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Online Access: | https://epic.awi.de/id/eprint/39018/ https://epic.awi.de/id/eprint/39018/1/Eagles_etal_COBs_2015_ESR_accepted.pdf https://hdl.handle.net/10013/epic.46258 https://hdl.handle.net/10013/epic.46258.d001 |
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ftawi:oai:epic.awi.de:39018 2024-09-09T20:08:49+00:00 Getting over continent ocean boundaries Eagles, Graeme Pérez-Díaz, Lucía Scarselli, Nicola 2015-12 application/pdf https://epic.awi.de/id/eprint/39018/ https://epic.awi.de/id/eprint/39018/1/Eagles_etal_COBs_2015_ESR_accepted.pdf https://hdl.handle.net/10013/epic.46258 https://hdl.handle.net/10013/epic.46258.d001 unknown ELSEVIER SCIENCE BV https://epic.awi.de/id/eprint/39018/1/Eagles_etal_COBs_2015_ESR_accepted.pdf https://hdl.handle.net/10013/epic.46258.d001 Eagles, G. orcid:0000-0001-5325-0810 , Pérez-Díaz, L. and Scarselli, N. (2015) Getting over continent ocean boundaries , Earth-Science Reviews, 151 , pp. 244-265 . doi:10.1016/j.earscirev.2015.10.009 <https://doi.org/10.1016/j.earscirev.2015.10.009> , hdl:10013/epic.46258 EPIC3Earth-Science Reviews, ELSEVIER SCIENCE BV, 151, pp. 244-265, ISSN: 0012-8252 Article isiRev 2015 ftawi https://doi.org/10.1016/j.earscirev.2015.10.009 2024-06-24T04:12:21Z The idea of a simple linear boundary between continental and oceanic crust at extended continental margins is widely recognized to be an oversimplification. Despite this, such boundaries continue to be mapped because of their perceived utility in palinspastic and plate kinematic reconstructions. To examine whether this perception is justified, we review the data and models on which basis continent ocean boundaries are interpreted, and map a set of such interpretations worldwide from more than 150 publications. The maps show that the location of the continent ocean boundary is rarely consistently estimated within the ~ 10–100 km observational uncertainty that might be expected of the geophysical data used for doing so, that this is the case regardless of whether the transition zone behind the boundary is classified as magma rich or magma poor, and that the geographical separation of estimates exceeds the width of single-study continent ocean transition zones. The average of global maximum separations across sets of three or more estimates is large (167 km) and mostly a consequence of interpretations published over the last decade. We interpret this to indicate an extra component of uncertainty that is related to authors' understanding of the range of features that are interpretable at extended continental margins. We go on to discuss the implications of this uncertainty for palinspastic and plate kinematic modelling using examples from the literature and from the South Atlantic Ocean. We conclude that a precise continent ocean boundary concept with locational uncertainty defined from the ensembles is of limited value for palinspastic reconstructions because the reconstruction process tends to bunch the ensemble within a region that is (i) of similar width to the observational uncertainties associated with continent ocean boundary estimates, (ii) narrower than the regions of uncertainty about rotated features implied by the propagation of uncertainties from plate rotation parameters, and (iii) coincident, within ... Article in Journal/Newspaper South Atlantic Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Earth-Science Reviews 151 244 265 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The idea of a simple linear boundary between continental and oceanic crust at extended continental margins is widely recognized to be an oversimplification. Despite this, such boundaries continue to be mapped because of their perceived utility in palinspastic and plate kinematic reconstructions. To examine whether this perception is justified, we review the data and models on which basis continent ocean boundaries are interpreted, and map a set of such interpretations worldwide from more than 150 publications. The maps show that the location of the continent ocean boundary is rarely consistently estimated within the ~ 10–100 km observational uncertainty that might be expected of the geophysical data used for doing so, that this is the case regardless of whether the transition zone behind the boundary is classified as magma rich or magma poor, and that the geographical separation of estimates exceeds the width of single-study continent ocean transition zones. The average of global maximum separations across sets of three or more estimates is large (167 km) and mostly a consequence of interpretations published over the last decade. We interpret this to indicate an extra component of uncertainty that is related to authors' understanding of the range of features that are interpretable at extended continental margins. We go on to discuss the implications of this uncertainty for palinspastic and plate kinematic modelling using examples from the literature and from the South Atlantic Ocean. We conclude that a precise continent ocean boundary concept with locational uncertainty defined from the ensembles is of limited value for palinspastic reconstructions because the reconstruction process tends to bunch the ensemble within a region that is (i) of similar width to the observational uncertainties associated with continent ocean boundary estimates, (ii) narrower than the regions of uncertainty about rotated features implied by the propagation of uncertainties from plate rotation parameters, and (iii) coincident, within ... |
format |
Article in Journal/Newspaper |
author |
Eagles, Graeme Pérez-Díaz, Lucía Scarselli, Nicola |
spellingShingle |
Eagles, Graeme Pérez-Díaz, Lucía Scarselli, Nicola Getting over continent ocean boundaries |
author_facet |
Eagles, Graeme Pérez-Díaz, Lucía Scarselli, Nicola |
author_sort |
Eagles, Graeme |
title |
Getting over continent ocean boundaries |
title_short |
Getting over continent ocean boundaries |
title_full |
Getting over continent ocean boundaries |
title_fullStr |
Getting over continent ocean boundaries |
title_full_unstemmed |
Getting over continent ocean boundaries |
title_sort |
getting over continent ocean boundaries |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/39018/ https://epic.awi.de/id/eprint/39018/1/Eagles_etal_COBs_2015_ESR_accepted.pdf https://hdl.handle.net/10013/epic.46258 https://hdl.handle.net/10013/epic.46258.d001 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
EPIC3Earth-Science Reviews, ELSEVIER SCIENCE BV, 151, pp. 244-265, ISSN: 0012-8252 |
op_relation |
https://epic.awi.de/id/eprint/39018/1/Eagles_etal_COBs_2015_ESR_accepted.pdf https://hdl.handle.net/10013/epic.46258.d001 Eagles, G. orcid:0000-0001-5325-0810 , Pérez-Díaz, L. and Scarselli, N. (2015) Getting over continent ocean boundaries , Earth-Science Reviews, 151 , pp. 244-265 . doi:10.1016/j.earscirev.2015.10.009 <https://doi.org/10.1016/j.earscirev.2015.10.009> , hdl:10013/epic.46258 |
op_doi |
https://doi.org/10.1016/j.earscirev.2015.10.009 |
container_title |
Earth-Science Reviews |
container_volume |
151 |
container_start_page |
244 |
op_container_end_page |
265 |
_version_ |
1809942895674785792 |