Insights into the crustal structure of the transition between Nares Strait and Baffin Bay
The crustal structure and continental margin between southern Nares Strait and northern Baffin Bay were studied based on seismic refraction and gravity data acquired in 2010. We present the resulting P wave velocity, density and geological models of the crustal structure of a profile, which extends...
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ftawi:oai:epic.awi.de:40940 2023-05-15T15:34:58+02:00 Insights into the crustal structure of the transition between Nares Strait and Baffin Bay Altenbernd, Tabea Jokat, Wilfried Heyde, Ingo Damm, Volkmar 2016-11-17 https://epic.awi.de/id/eprint/40940/ https://hdl.handle.net/10013/epic.49000 unknown ELSEVIER SCIENCE BV Altenbernd, T. orcid:0000-0002-2295-9250 , Jokat, W. orcid:0000-0002-7793-5854 , Heyde, I. and Damm, V. (2016) Insights into the crustal structure of the transition between Nares Strait and Baffin Bay , Tectonophysics, 691 , pp. 31-47 . doi:10.1016/j.tecto.2016.04.001 <https://doi.org/10.1016/j.tecto.2016.04.001> , hdl:10013/epic.49000 EPIC3Tectonophysics, ELSEVIER SCIENCE BV, 691, pp. 31-47, ISSN: 0040-1951 Article isiRev 2016 ftawi https://doi.org/10.1016/j.tecto.2016.04.001 2021-12-24T15:41:35Z The crustal structure and continental margin between southern Nares Strait and northern Baffin Bay were studied based on seismic refraction and gravity data acquired in 2010. We present the resulting P wave velocity, density and geological models of the crustal structure of a profile, which extends from the Greenlandic margin of the Nares Strait into the deep basin of central northern Baffin Bay. For the first time, the crustal structure of the continent-ocean transition of the very northern part of Baffin Bay could be imaged. We divide the profile into three parts: continental, thin oceanic, and transitional crust. On top of the three-layered continental crust, a low-velocity zone characterizes the lowermost layer of the three-layered Thule Supergroup underneath Steensby Basin. The 4.3–6.3 km thick oceanic crust in the southern part of the profile can be divided into a northern and southern section, more or less separated by a fracture zone. The oceanic crust adjacent to the continent-ocean transition is composed of 3 layers and characterized by oceanic layer 3 velocities of 6.7–7.3 km/s. Toward the south only two oceanic crustal layers are necessary to model the travel time curves. Here, the lower oceanic crust has lower seismic velocities (6.4–6.8 km/s) than in the north. Rather low velocities of 7.7 km/s characterize the upper mantle underneath the oceanic crust, which we interpret as an indication for the presence of upper mantle serpentinization. In the continent-ocean transition zone, the velocities are lower than in the adjacent continental and oceanic crustal units. There are no signs for massive magmatism or the existence of a transform margin in our study area. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin greenlandic Nares strait Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Baffin Bay Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Tectonophysics 691 31 47 |
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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 crustal structure and continental margin between southern Nares Strait and northern Baffin Bay were studied based on seismic refraction and gravity data acquired in 2010. We present the resulting P wave velocity, density and geological models of the crustal structure of a profile, which extends from the Greenlandic margin of the Nares Strait into the deep basin of central northern Baffin Bay. For the first time, the crustal structure of the continent-ocean transition of the very northern part of Baffin Bay could be imaged. We divide the profile into three parts: continental, thin oceanic, and transitional crust. On top of the three-layered continental crust, a low-velocity zone characterizes the lowermost layer of the three-layered Thule Supergroup underneath Steensby Basin. The 4.3–6.3 km thick oceanic crust in the southern part of the profile can be divided into a northern and southern section, more or less separated by a fracture zone. The oceanic crust adjacent to the continent-ocean transition is composed of 3 layers and characterized by oceanic layer 3 velocities of 6.7–7.3 km/s. Toward the south only two oceanic crustal layers are necessary to model the travel time curves. Here, the lower oceanic crust has lower seismic velocities (6.4–6.8 km/s) than in the north. Rather low velocities of 7.7 km/s characterize the upper mantle underneath the oceanic crust, which we interpret as an indication for the presence of upper mantle serpentinization. In the continent-ocean transition zone, the velocities are lower than in the adjacent continental and oceanic crustal units. There are no signs for massive magmatism or the existence of a transform margin in our study area. |
format |
Article in Journal/Newspaper |
author |
Altenbernd, Tabea Jokat, Wilfried Heyde, Ingo Damm, Volkmar |
spellingShingle |
Altenbernd, Tabea Jokat, Wilfried Heyde, Ingo Damm, Volkmar Insights into the crustal structure of the transition between Nares Strait and Baffin Bay |
author_facet |
Altenbernd, Tabea Jokat, Wilfried Heyde, Ingo Damm, Volkmar |
author_sort |
Altenbernd, Tabea |
title |
Insights into the crustal structure of the transition between Nares Strait and Baffin Bay |
title_short |
Insights into the crustal structure of the transition between Nares Strait and Baffin Bay |
title_full |
Insights into the crustal structure of the transition between Nares Strait and Baffin Bay |
title_fullStr |
Insights into the crustal structure of the transition between Nares Strait and Baffin Bay |
title_full_unstemmed |
Insights into the crustal structure of the transition between Nares Strait and Baffin Bay |
title_sort |
insights into the crustal structure of the transition between nares strait and baffin bay |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/40940/ https://hdl.handle.net/10013/epic.49000 |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) |
geographic |
Baffin Bay Nares |
geographic_facet |
Baffin Bay Nares |
genre |
Baffin Bay Baffin Bay Baffin greenlandic Nares strait |
genre_facet |
Baffin Bay Baffin Bay Baffin greenlandic Nares strait |
op_source |
EPIC3Tectonophysics, ELSEVIER SCIENCE BV, 691, pp. 31-47, ISSN: 0040-1951 |
op_relation |
Altenbernd, T. orcid:0000-0002-2295-9250 , Jokat, W. orcid:0000-0002-7793-5854 , Heyde, I. and Damm, V. (2016) Insights into the crustal structure of the transition between Nares Strait and Baffin Bay , Tectonophysics, 691 , pp. 31-47 . doi:10.1016/j.tecto.2016.04.001 <https://doi.org/10.1016/j.tecto.2016.04.001> , hdl:10013/epic.49000 |
op_doi |
https://doi.org/10.1016/j.tecto.2016.04.001 |
container_title |
Tectonophysics |
container_volume |
691 |
container_start_page |
31 |
op_container_end_page |
47 |
_version_ |
1766365228565528576 |