Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center
A combined ocean bottom seismometer, multichannel seismic reflection and gravity study has been carried out along the spreading direction of the Knipovich Ridge over a topographic high that defines a segment center. The youngest parts of the crust in the immediate vicinity of the ridge reveal fractu...
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ftunivbergen:oai:bora.uib.no:1956/4490 2023-05-15T17:34:17+02:00 Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center Kandilarov, Aleksandre Landa, Hildegunn Mjelde, Rolf Pedersen, Rolf Birger Okino, Kyoko Murai, Yoshio 2010 application/pdf https://hdl.handle.net/1956/4490 https://doi.org/10.1007/s11001-010-9095-8 eng eng Springer https://hdl.handle.net/1956/4490 https://doi.org/10.1007/s11001-010-9095-8 Attribution-NonCommercial CC BY-NC http://creativecommons.org/licenses/by-nc/2.5/ The Author(s) Copyright The Author(s) 2010. This article is published with open access at Springerlink.com Knipovich Ridge Ultra-slow spreading Crustal structure Refraction seismics Ocean bottom seismometer Multichannel seismic reflection VDP::Mathematics and natural science: 400 Peer reviewed Journal article 2010 ftunivbergen https://doi.org/10.1007/s11001-010-9095-8 2023-03-14T17:40:10Z A combined ocean bottom seismometer, multichannel seismic reflection and gravity study has been carried out along the spreading direction of the Knipovich Ridge over a topographic high that defines a segment center. The youngest parts of the crust in the immediate vicinity of the ridge reveal fractured Oceanic Layer 2 and thermally expanded and possibly serpentinized Oceanic Layer 3. The mature part of the crust has normal thickness and seismic velocities with no significant crustal thickness and seismic velocity variations. Mature Oceanic Layer 2 is in addition broken into several rotated fault blocks. Comparison with a profile acquired *40 km north of the segment center reveals significant differences. Along this profile, reported earlier, periods of slower spreading led to generation of thin crust with a high P-wave velocity (Vp), composed of a mixture of gabbro and serpentinized mantle, while periods of faster spreading led to generation of more normal gabbroic crust. For the profile across the segment center no clear relation exists between spreading rate and crustal thickness and seismic velocity. In this study we have found that higher magmatism may lead to generation of oceanic crust with normal thickness even at ultra-slow spreading rates. publishedVersion Article in Journal/Newspaper North Atlantic University of Bergen: Bergen Open Research Archive (BORA-UiB) Knipovich Ridge ENVELOPE(7.074,7.074,75.712,75.712) Marine Geophysical Researches 31 3 173 195 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Knipovich Ridge Ultra-slow spreading Crustal structure Refraction seismics Ocean bottom seismometer Multichannel seismic reflection VDP::Mathematics and natural science: 400 |
spellingShingle |
Knipovich Ridge Ultra-slow spreading Crustal structure Refraction seismics Ocean bottom seismometer Multichannel seismic reflection VDP::Mathematics and natural science: 400 Kandilarov, Aleksandre Landa, Hildegunn Mjelde, Rolf Pedersen, Rolf Birger Okino, Kyoko Murai, Yoshio Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center |
topic_facet |
Knipovich Ridge Ultra-slow spreading Crustal structure Refraction seismics Ocean bottom seismometer Multichannel seismic reflection VDP::Mathematics and natural science: 400 |
description |
A combined ocean bottom seismometer, multichannel seismic reflection and gravity study has been carried out along the spreading direction of the Knipovich Ridge over a topographic high that defines a segment center. The youngest parts of the crust in the immediate vicinity of the ridge reveal fractured Oceanic Layer 2 and thermally expanded and possibly serpentinized Oceanic Layer 3. The mature part of the crust has normal thickness and seismic velocities with no significant crustal thickness and seismic velocity variations. Mature Oceanic Layer 2 is in addition broken into several rotated fault blocks. Comparison with a profile acquired *40 km north of the segment center reveals significant differences. Along this profile, reported earlier, periods of slower spreading led to generation of thin crust with a high P-wave velocity (Vp), composed of a mixture of gabbro and serpentinized mantle, while periods of faster spreading led to generation of more normal gabbroic crust. For the profile across the segment center no clear relation exists between spreading rate and crustal thickness and seismic velocity. In this study we have found that higher magmatism may lead to generation of oceanic crust with normal thickness even at ultra-slow spreading rates. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Kandilarov, Aleksandre Landa, Hildegunn Mjelde, Rolf Pedersen, Rolf Birger Okino, Kyoko Murai, Yoshio |
author_facet |
Kandilarov, Aleksandre Landa, Hildegunn Mjelde, Rolf Pedersen, Rolf Birger Okino, Kyoko Murai, Yoshio |
author_sort |
Kandilarov, Aleksandre |
title |
Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center |
title_short |
Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center |
title_full |
Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center |
title_fullStr |
Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center |
title_full_unstemmed |
Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center |
title_sort |
crustal structure of the ultra-slow spreading knipovich ridge, north atlantic, along a presumed ridge segment center |
publisher |
Springer |
publishDate |
2010 |
url |
https://hdl.handle.net/1956/4490 https://doi.org/10.1007/s11001-010-9095-8 |
long_lat |
ENVELOPE(7.074,7.074,75.712,75.712) |
geographic |
Knipovich Ridge |
geographic_facet |
Knipovich Ridge |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://hdl.handle.net/1956/4490 https://doi.org/10.1007/s11001-010-9095-8 |
op_rights |
Attribution-NonCommercial CC BY-NC http://creativecommons.org/licenses/by-nc/2.5/ The Author(s) Copyright The Author(s) 2010. This article is published with open access at Springerlink.com |
op_doi |
https://doi.org/10.1007/s11001-010-9095-8 |
container_title |
Marine Geophysical Researches |
container_volume |
31 |
container_issue |
3 |
container_start_page |
173 |
op_container_end_page |
195 |
_version_ |
1766133077418967040 |