Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data
High Arctic new seismic data, collected by Russian Federation from 2011 to 2014, and additional geological and geophysical information, are used to interpret the basement and sedimentary structure of central and eastern Eurasia Basin, the Gakkel Ridge, and their transition into the Laptev Sea. We fi...
Published in: | Tectonophysics |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | http://hdl.handle.net/10852/72327 http://urn.nb.no/URN:NBN:no-75431 https://doi.org/10.1016/j.tecto.2017.09.006 |
id |
ftoslouniv:oai:www.duo.uio.no:10852/72327 |
---|---|
record_format |
openpolar |
spelling |
ftoslouniv:oai:www.duo.uio.no:10852/72327 2023-05-15T13:22:42+02:00 Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data Nikishin, AM Gaina, Carmen Petrov, E.I. Malyshev, NA Freiman, SI 2018-12-20T11:23:39Z http://hdl.handle.net/10852/72327 http://urn.nb.no/URN:NBN:no-75431 https://doi.org/10.1016/j.tecto.2017.09.006 EN eng NFR/223272 http://urn.nb.no/URN:NBN:no-75431 Nikishin, AM Gaina, Carmen Petrov, E.I. Malyshev, NA Freiman, SI . Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data. Tectonophysics. 2018, 746, 64-82 http://hdl.handle.net/10852/72327 1646116 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tectonophysics&rft.volume=746&rft.spage=64&rft.date=2018 Tectonophysics 746 64 82 https://doi.org/10.1016/j.tecto.2017.09.006 URN:NBN:no-75431 Fulltext https://www.duo.uio.no/bitstream/handle/10852/72327/2/Nikishin-Tectonophysics-TECTO12062R1-accepted.pdf Attribution-NonCommercial-NoDerivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND 0040-1951 Journal article Tidsskriftartikkel Peer reviewed AcceptedVersion 2018 ftoslouniv https://doi.org/10.1016/j.tecto.2017.09.006 2020-06-21T08:53:09Z High Arctic new seismic data, collected by Russian Federation from 2011 to 2014, and additional geological and geophysical information, are used to interpret the basement and sedimentary structure of central and eastern Eurasia Basin, the Gakkel Ridge, and their transition into the Laptev Sea. We find that significant changes in basement topography occur in Nansen Basin at C20 (43.43 Ma) and in the Amundsen basins at C21 (45.7 Ma), and in both basins at C13 (33 Ma). A long seismic profile, that documents for the first time the structure of conjugate flanks and their margins in the central-eastern Eurasia Basin, confirms that oceanic accretion was asymmetric, with 10% less crust developed in the Amundsen Basin since continental break-up. In the eastern Amundsen Basin, we observe mid-ocean ridge uplift since C13 (33 Ma). We identify four distinct sedimentary packages in the Eurasia Basin: Early to Mid Eocene (c. 56 to 45.7 Ma), Mid Eocene to Early Oligocene (45.7 to 33.2 Ma), Early Oligocene to Early Miocene (33.2 to 19.7) and Early Miocene to Present (19.7 to 0 Ma); they are linked to the oceanic lithosphere age determined from magnetic data. The deepest part of the Gakkel Ridge (5215 m), situated close to the easternmost part of this mid ocean ridge, is imaged for the first time by seismic data that reveals volcanic constructions within the older axial ridges and on the flanks. Gakkel Ridge's asymmetric flanks with shallow, regularly-spaced, and rugged structure, typical to ultra-slow spreading ridges, imply periodicity of tectonic phases. The Khatanga-Lomonosov Fault between Lomonosov Ridge and the Laptev Sea region, is identified on few seismic profiles; kinematic models predict that it may have been active only for a maximum of 10 myr after continental break-up. Article in Journal/Newspaper amundsen basin Arctic Arctic Arctic Ocean khatanga laptev Laptev Sea Lomonosov Ridge Nansen Basin Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) Arctic Arctic Ocean Eurasia Basin ENVELOPE(80.000,80.000,87.000,87.000) Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Laptev Sea Tectonophysics 746 64 82 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
High Arctic new seismic data, collected by Russian Federation from 2011 to 2014, and additional geological and geophysical information, are used to interpret the basement and sedimentary structure of central and eastern Eurasia Basin, the Gakkel Ridge, and their transition into the Laptev Sea. We find that significant changes in basement topography occur in Nansen Basin at C20 (43.43 Ma) and in the Amundsen basins at C21 (45.7 Ma), and in both basins at C13 (33 Ma). A long seismic profile, that documents for the first time the structure of conjugate flanks and their margins in the central-eastern Eurasia Basin, confirms that oceanic accretion was asymmetric, with 10% less crust developed in the Amundsen Basin since continental break-up. In the eastern Amundsen Basin, we observe mid-ocean ridge uplift since C13 (33 Ma). We identify four distinct sedimentary packages in the Eurasia Basin: Early to Mid Eocene (c. 56 to 45.7 Ma), Mid Eocene to Early Oligocene (45.7 to 33.2 Ma), Early Oligocene to Early Miocene (33.2 to 19.7) and Early Miocene to Present (19.7 to 0 Ma); they are linked to the oceanic lithosphere age determined from magnetic data. The deepest part of the Gakkel Ridge (5215 m), situated close to the easternmost part of this mid ocean ridge, is imaged for the first time by seismic data that reveals volcanic constructions within the older axial ridges and on the flanks. Gakkel Ridge's asymmetric flanks with shallow, regularly-spaced, and rugged structure, typical to ultra-slow spreading ridges, imply periodicity of tectonic phases. The Khatanga-Lomonosov Fault between Lomonosov Ridge and the Laptev Sea region, is identified on few seismic profiles; kinematic models predict that it may have been active only for a maximum of 10 myr after continental break-up. |
format |
Article in Journal/Newspaper |
author |
Nikishin, AM Gaina, Carmen Petrov, E.I. Malyshev, NA Freiman, SI |
spellingShingle |
Nikishin, AM Gaina, Carmen Petrov, E.I. Malyshev, NA Freiman, SI Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data |
author_facet |
Nikishin, AM Gaina, Carmen Petrov, E.I. Malyshev, NA Freiman, SI |
author_sort |
Nikishin, AM |
title |
Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data |
title_short |
Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data |
title_full |
Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data |
title_fullStr |
Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data |
title_full_unstemmed |
Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data |
title_sort |
eurasia basin and gakkel ridge, arctic ocean: crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data |
publishDate |
2018 |
url |
http://hdl.handle.net/10852/72327 http://urn.nb.no/URN:NBN:no-75431 https://doi.org/10.1016/j.tecto.2017.09.006 |
long_lat |
ENVELOPE(74.000,74.000,87.000,87.000) ENVELOPE(80.000,80.000,87.000,87.000) ENVELOPE(90.000,90.000,87.000,87.000) |
geographic |
Amundsen Basin Arctic Arctic Ocean Eurasia Basin Gakkel Ridge Laptev Sea |
geographic_facet |
Amundsen Basin Arctic Arctic Ocean Eurasia Basin Gakkel Ridge Laptev Sea |
genre |
amundsen basin Arctic Arctic Arctic Ocean khatanga laptev Laptev Sea Lomonosov Ridge Nansen Basin |
genre_facet |
amundsen basin Arctic Arctic Arctic Ocean khatanga laptev Laptev Sea Lomonosov Ridge Nansen Basin |
op_source |
0040-1951 |
op_relation |
NFR/223272 http://urn.nb.no/URN:NBN:no-75431 Nikishin, AM Gaina, Carmen Petrov, E.I. Malyshev, NA Freiman, SI . Eurasia Basin and Gakkel Ridge, Arctic Ocean: Crustal asymmetry, ultra-slow spreading and continental rifting revealed by new seismic data. Tectonophysics. 2018, 746, 64-82 http://hdl.handle.net/10852/72327 1646116 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tectonophysics&rft.volume=746&rft.spage=64&rft.date=2018 Tectonophysics 746 64 82 https://doi.org/10.1016/j.tecto.2017.09.006 URN:NBN:no-75431 Fulltext https://www.duo.uio.no/bitstream/handle/10852/72327/2/Nikishin-Tectonophysics-TECTO12062R1-accepted.pdf |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.tecto.2017.09.006 |
container_title |
Tectonophysics |
container_volume |
746 |
container_start_page |
64 |
op_container_end_page |
82 |
_version_ |
1766366406817873920 |