On the evolution of the North Atlantic -from continental collapse to oceanic accretion
The North Atlantic between Iceland and Svalbard and surrounding continental areas represent an ideal laboratory for studying plate tectonic processes, due to the presence of well exposed continent-continent collision terranes on the Norwegian mainland and dense coverage of offshore geophysical data...
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The University of Bergen
2013
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ftunivbergen:oai:bora.uib.no:1956/7522 2023-05-15T16:52:14+02:00 On the evolution of the North Atlantic -from continental collapse to oceanic accretion Kvarven, Trond 2013-10-23 application/pdf https://hdl.handle.net/1956/7522 eng eng The University of Bergen Paper 1: Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data. Full-text not available in BORA. Paper 2: Lower crustal eclogites and structural geometry of the conjugate East Greenland and Norwegian margins. Full-text not available in BORA. Paper 3: Tectonic and sedimentary processes along the ultraslow Knipovich spreading ridge. Full-text not available in BORA. urn:isbn:978-82-308-2393-4 https://hdl.handle.net/1956/7522 Copyright the author. All rights reserved Doctoral thesis 2013 ftunivbergen 2023-03-14T17:40:49Z The North Atlantic between Iceland and Svalbard and surrounding continental areas represent an ideal laboratory for studying plate tectonic processes, due to the presence of well exposed continent-continent collision terranes on the Norwegian mainland and dense coverage of offshore geophysical data documenting subsequent extensional processes, continental break-up and formation of oceanic crust. Interpretation of crustal-scale wide-angle seismic models suggests that the main Caledonian suture might be linked with bodies of lower crustal eclogites localized along the Norwegian continental margin (e.g. Mjelde et al., 2010). Since terrains of eclogites are exposed in the Western Gneiss Region, a wide-angle seismic profile was acquired across the onshore transition in this area. The main aim with the research work presented in Paper 1 (this thesis) is to identify possible lower crustal high-velocity bodies, and thus the suture, in this region. Paper 2 aims at interpreting the suture from the North Sea to Svalbard, by use of available crustal scale models. Furthermore, paper 2 discusses the back-stripping of two crustal-scale transects across the Atlantic, in order to identify the dominant tectono-magmatic processes active at various stages of the area’s geological evolution. The two transects are located on opposite sides of the Jan Mayen Fracture Zone, which assures that possible change from upper to lower plate configuration along strike can be addressed. Paper 3 focuses on interpretation of multi-channel seismic data from the Knipovich Ridge. The main aim with this study is to reveal the interplay between tectonism and magmatism along this ultra-slow oceanic spreading ridge. Furthermore, the sedimentary processes transporting huge amounts of sediments from Svalbard, and their interaction with the spreading ridge, will be addressed. The main contribution with this thesis is that it discusses a selection of tectonic, magmatic and sedimentary processes active during all stages of ocean basin formation, i.e. collapse ... Doctoral or Postdoctoral Thesis Iceland Jan Mayen North Atlantic Svalbard University of Bergen: Bergen Open Research Archive (BORA-UiB) Jan Mayen Jan Mayen Fracture Zone ENVELOPE(-8.000,-8.000,71.200,71.200) Knipovich Ridge ENVELOPE(7.074,7.074,75.712,75.712) Svalbard Svalbard ENVELOPE(20.000,20.000,78.000,78.000) |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
The North Atlantic between Iceland and Svalbard and surrounding continental areas represent an ideal laboratory for studying plate tectonic processes, due to the presence of well exposed continent-continent collision terranes on the Norwegian mainland and dense coverage of offshore geophysical data documenting subsequent extensional processes, continental break-up and formation of oceanic crust. Interpretation of crustal-scale wide-angle seismic models suggests that the main Caledonian suture might be linked with bodies of lower crustal eclogites localized along the Norwegian continental margin (e.g. Mjelde et al., 2010). Since terrains of eclogites are exposed in the Western Gneiss Region, a wide-angle seismic profile was acquired across the onshore transition in this area. The main aim with the research work presented in Paper 1 (this thesis) is to identify possible lower crustal high-velocity bodies, and thus the suture, in this region. Paper 2 aims at interpreting the suture from the North Sea to Svalbard, by use of available crustal scale models. Furthermore, paper 2 discusses the back-stripping of two crustal-scale transects across the Atlantic, in order to identify the dominant tectono-magmatic processes active at various stages of the area’s geological evolution. The two transects are located on opposite sides of the Jan Mayen Fracture Zone, which assures that possible change from upper to lower plate configuration along strike can be addressed. Paper 3 focuses on interpretation of multi-channel seismic data from the Knipovich Ridge. The main aim with this study is to reveal the interplay between tectonism and magmatism along this ultra-slow oceanic spreading ridge. Furthermore, the sedimentary processes transporting huge amounts of sediments from Svalbard, and their interaction with the spreading ridge, will be addressed. The main contribution with this thesis is that it discusses a selection of tectonic, magmatic and sedimentary processes active during all stages of ocean basin formation, i.e. collapse ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Kvarven, Trond |
spellingShingle |
Kvarven, Trond On the evolution of the North Atlantic -from continental collapse to oceanic accretion |
author_facet |
Kvarven, Trond |
author_sort |
Kvarven, Trond |
title |
On the evolution of the North Atlantic -from continental collapse to oceanic accretion |
title_short |
On the evolution of the North Atlantic -from continental collapse to oceanic accretion |
title_full |
On the evolution of the North Atlantic -from continental collapse to oceanic accretion |
title_fullStr |
On the evolution of the North Atlantic -from continental collapse to oceanic accretion |
title_full_unstemmed |
On the evolution of the North Atlantic -from continental collapse to oceanic accretion |
title_sort |
on the evolution of the north atlantic -from continental collapse to oceanic accretion |
publisher |
The University of Bergen |
publishDate |
2013 |
url |
https://hdl.handle.net/1956/7522 |
long_lat |
ENVELOPE(-8.000,-8.000,71.200,71.200) ENVELOPE(7.074,7.074,75.712,75.712) ENVELOPE(20.000,20.000,78.000,78.000) |
geographic |
Jan Mayen Jan Mayen Fracture Zone Knipovich Ridge Svalbard Svalbard |
geographic_facet |
Jan Mayen Jan Mayen Fracture Zone Knipovich Ridge Svalbard Svalbard |
genre |
Iceland Jan Mayen North Atlantic Svalbard |
genre_facet |
Iceland Jan Mayen North Atlantic Svalbard |
op_relation |
Paper 1: Crustal structure across the Møre margin, mid-Norway, from wide-angle seismic and gravity data. Full-text not available in BORA. Paper 2: Lower crustal eclogites and structural geometry of the conjugate East Greenland and Norwegian margins. Full-text not available in BORA. Paper 3: Tectonic and sedimentary processes along the ultraslow Knipovich spreading ridge. Full-text not available in BORA. urn:isbn:978-82-308-2393-4 https://hdl.handle.net/1956/7522 |
op_rights |
Copyright the author. All rights reserved |
_version_ |
1766042388184170496 |