The transition zone between the Eurasian continent and the Arctic Ocean
Geophysical and bathymetric results have been used for the study of the transitional zone between the Eurasian continent and the Arctic Ocean, which is being considered by the authors as a junction area of continental margins with the adjacent seaward structures, and is dependent of the actual type...
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crcansciencepubl:10.1139/e68-109 2023-12-17T10:25:11+01:00 The transition zone between the Eurasian continent and the Arctic Ocean Demenitskaya, R. M. Karasik, A. M. Kiselev, Yu. G. Litvinenko, I. V. Ushakov, S. A. 1968 http://dx.doi.org/10.1139/e68-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/e68-109 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 5, issue 4, page 1125-1129 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1968 crcansciencepubl https://doi.org/10.1139/e68-109 2023-11-19T13:38:20Z Geophysical and bathymetric results have been used for the study of the transitional zone between the Eurasian continent and the Arctic Ocean, which is being considered by the authors as a junction area of continental margins with the adjacent seaward structures, and is dependent of the actual type of the crust found beneath the ocean.The deep Arctic Ocean comprises different types of crust: basins have an oceanic crust with increased sedimentary thickness; the Lomonosov and Mendeleev Ridges have crusts close to subcontinental; and the crust of the Gakkel Ridge is typically mid-oceanic. At least four types of transition zones may be distinguished: (1) 'normal' transition zone, where the 'granitic' layer is wedging out and the crust consists of a thinned sedimentary layer and 'basalt'; this is the junction of the continent and the oceanic basin; (2) a zone where the continental crust thins to the oceanic crust, the 'granitic' layer is absent, and the 'basalt' layer is underlain by the 7.5 km/s layer, rather than the normal mantle; this is represented by the junction of the continent with the rift zone of the median ridge that juts out into the shelf and extends under the continent; (3) a zone where the continental crust thins, the 'granitic' layer is wedging out, but the crust does not thin to the oceanic crust, mainly because of an increase in thickness of sediments; this zone is a junction of the continent with a basin with subcontinental crust; (4) a zone where the continental crust thins, but does not reach oceanic thickness; this is a junction of the continent with the oceanic crust. In the transition zones of the first and third types structural downwarping compensated by the sediments has been developed.The development of the transition zone of the Arctic was intermittent in the geological past, which we see expressed by the asymmetric development of the Greenland–Canadian and Eurasian sectors. These examples of different structures of transition zones are not unique. The transition zone between the ... Article in Journal/Newspaper Arctic Arctic Ocean Greenland Canadian Science Publishing (via Crossref) Arctic Arctic Ocean Greenland Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Median Ridge ENVELOPE(-62.833,-62.833,-64.983,-64.983) Canadian Journal of Earth Sciences 5 4 1125 1129 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Demenitskaya, R. M. Karasik, A. M. Kiselev, Yu. G. Litvinenko, I. V. Ushakov, S. A. The transition zone between the Eurasian continent and the Arctic Ocean |
topic_facet |
General Earth and Planetary Sciences |
description |
Geophysical and bathymetric results have been used for the study of the transitional zone between the Eurasian continent and the Arctic Ocean, which is being considered by the authors as a junction area of continental margins with the adjacent seaward structures, and is dependent of the actual type of the crust found beneath the ocean.The deep Arctic Ocean comprises different types of crust: basins have an oceanic crust with increased sedimentary thickness; the Lomonosov and Mendeleev Ridges have crusts close to subcontinental; and the crust of the Gakkel Ridge is typically mid-oceanic. At least four types of transition zones may be distinguished: (1) 'normal' transition zone, where the 'granitic' layer is wedging out and the crust consists of a thinned sedimentary layer and 'basalt'; this is the junction of the continent and the oceanic basin; (2) a zone where the continental crust thins to the oceanic crust, the 'granitic' layer is absent, and the 'basalt' layer is underlain by the 7.5 km/s layer, rather than the normal mantle; this is represented by the junction of the continent with the rift zone of the median ridge that juts out into the shelf and extends under the continent; (3) a zone where the continental crust thins, the 'granitic' layer is wedging out, but the crust does not thin to the oceanic crust, mainly because of an increase in thickness of sediments; this zone is a junction of the continent with a basin with subcontinental crust; (4) a zone where the continental crust thins, but does not reach oceanic thickness; this is a junction of the continent with the oceanic crust. In the transition zones of the first and third types structural downwarping compensated by the sediments has been developed.The development of the transition zone of the Arctic was intermittent in the geological past, which we see expressed by the asymmetric development of the Greenland–Canadian and Eurasian sectors. These examples of different structures of transition zones are not unique. The transition zone between the ... |
format |
Article in Journal/Newspaper |
author |
Demenitskaya, R. M. Karasik, A. M. Kiselev, Yu. G. Litvinenko, I. V. Ushakov, S. A. |
author_facet |
Demenitskaya, R. M. Karasik, A. M. Kiselev, Yu. G. Litvinenko, I. V. Ushakov, S. A. |
author_sort |
Demenitskaya, R. M. |
title |
The transition zone between the Eurasian continent and the Arctic Ocean |
title_short |
The transition zone between the Eurasian continent and the Arctic Ocean |
title_full |
The transition zone between the Eurasian continent and the Arctic Ocean |
title_fullStr |
The transition zone between the Eurasian continent and the Arctic Ocean |
title_full_unstemmed |
The transition zone between the Eurasian continent and the Arctic Ocean |
title_sort |
transition zone between the eurasian continent and the arctic ocean |
publisher |
Canadian Science Publishing |
publishDate |
1968 |
url |
http://dx.doi.org/10.1139/e68-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/e68-109 |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) ENVELOPE(-62.833,-62.833,-64.983,-64.983) |
geographic |
Arctic Arctic Ocean Greenland Gakkel Ridge Median Ridge |
geographic_facet |
Arctic Arctic Ocean Greenland Gakkel Ridge Median Ridge |
genre |
Arctic Arctic Ocean Greenland |
genre_facet |
Arctic Arctic Ocean Greenland |
op_source |
Canadian Journal of Earth Sciences volume 5, issue 4, page 1125-1129 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e68-109 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
5 |
container_issue |
4 |
container_start_page |
1125 |
op_container_end_page |
1129 |
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1785574132776173568 |