The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt
Ellesmere Island in Arctic Canada displays a complex geological evolution. The region was affected by two distinct orogenies, the Palaeozoic Ellesmerian orogeny (the Caledonian equivalent in Arctic Canada and Northern Greenland) and the Palaeogene Eurekan orogeny, related to the opening of Baffin Ba...
Published in: | Geophysical Journal International |
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2016
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Online Access: | https://pure.au.dk/portal/da/publications/the-crustal-structure-of-ellesmere-island-arctic-canadateleseismic-mapping-across-a-remote-intraplate-orogenic-belt(3d135602-0d37-4f66-bc38-faccf1c18309).html https://doi.org/10.1093/gji/ggv539 https://pure.au.dk/ws/files/121629267/The_crustal_structure_of_Ellesmere_Island_Arctic_Canada_teleseismic_mapping_across_a_remote_intraplate_orogenic_belt.pdf |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/3d135602-0d37-4f66-bc38-faccf1c18309 2023-05-15T14:24:52+02:00 The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt Schiffer, Christian Stephenson, Randell Alexander Oakey, Gordon Jacobsen, Bo Holm 2016-03 application/pdf https://pure.au.dk/portal/da/publications/the-crustal-structure-of-ellesmere-island-arctic-canadateleseismic-mapping-across-a-remote-intraplate-orogenic-belt(3d135602-0d37-4f66-bc38-faccf1c18309).html https://doi.org/10.1093/gji/ggv539 https://pure.au.dk/ws/files/121629267/The_crustal_structure_of_Ellesmere_Island_Arctic_Canada_teleseismic_mapping_across_a_remote_intraplate_orogenic_belt.pdf eng eng info:eu-repo/semantics/openAccess Schiffer , C , Stephenson , R A , Oakey , G & Jacobsen , B H 2016 , ' The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt ' , Geophysical Journal International , vol. 204 , no. 3 , pp. 1579-1600 . https://doi.org/10.1093/gji/ggv539 Receiver functions Arctic Geology Seismology Crustal Structure Plate Tectonics article 2016 ftuniaarhuspubl https://doi.org/10.1093/gji/ggv539 2020-10-21T22:45:20Z Ellesmere Island in Arctic Canada displays a complex geological evolution. The region was affected by two distinct orogenies, the Palaeozoic Ellesmerian orogeny (the Caledonian equivalent in Arctic Canada and Northern Greenland) and the Palaeogene Eurekan orogeny, related to the opening of Baffin Bay and the consequent convergence of the Greenland plate. The details of this complex evolution and the present-day deep structure are poorly constrained in this remote area and deep geophysical data are sparse. Receiver function analysis of seven temporary broad-band seismometers of the Ellesmere Island Lithosphere Experiment complemented by two permanent stations provides important data on the crustal velocity structure of Ellesmere Island. The crustal expression of the northernmost tectonic block of Ellesmere Island (∼82°–83°N), Pearya, which was accreted during the Ellesmerian orogeny, is similar to that at the southernmost part, which is part of the Precambrian Laurentian (North America-Greenland) craton. Both segments have thick crystalline crust (∼35–36 km) and comparable velocity–depth profiles. In contrast, crustal thickness in central Ellesmere Island decreases from ∼24–30 km in the Eurekan fold and thrust belt (∼79.7°–80.6°N) to ∼16–20 km in the Hazen Stable Block (HSB; ∼80.6°–81.4°N) and is covered by a thick succession of metasediments. A deep crustal root (∼48 km) at ∼79.6°N is interpreted as cratonic crust flexed beneath the Eurekan fold and thrust belt. The Carboniferous to Palaeogene sedimentary succession of the Sverdrup Basin is inferred to be up to 1–4 km thick, comparable to geologically-based estimates, near the western margin of the HSB. Article in Journal/Newspaper Arctic Arctic Baffin Bay Baffin Bay Baffin Ellesmere Island Greenland sverdrup basin Aarhus University: Research Arctic Baffin Bay Canada Ellesmere Island Greenland Geophysical Journal International 204 3 1579 1600 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Receiver functions Arctic Geology Seismology Crustal Structure Plate Tectonics |
spellingShingle |
Receiver functions Arctic Geology Seismology Crustal Structure Plate Tectonics Schiffer, Christian Stephenson, Randell Alexander Oakey, Gordon Jacobsen, Bo Holm The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt |
topic_facet |
Receiver functions Arctic Geology Seismology Crustal Structure Plate Tectonics |
description |
Ellesmere Island in Arctic Canada displays a complex geological evolution. The region was affected by two distinct orogenies, the Palaeozoic Ellesmerian orogeny (the Caledonian equivalent in Arctic Canada and Northern Greenland) and the Palaeogene Eurekan orogeny, related to the opening of Baffin Bay and the consequent convergence of the Greenland plate. The details of this complex evolution and the present-day deep structure are poorly constrained in this remote area and deep geophysical data are sparse. Receiver function analysis of seven temporary broad-band seismometers of the Ellesmere Island Lithosphere Experiment complemented by two permanent stations provides important data on the crustal velocity structure of Ellesmere Island. The crustal expression of the northernmost tectonic block of Ellesmere Island (∼82°–83°N), Pearya, which was accreted during the Ellesmerian orogeny, is similar to that at the southernmost part, which is part of the Precambrian Laurentian (North America-Greenland) craton. Both segments have thick crystalline crust (∼35–36 km) and comparable velocity–depth profiles. In contrast, crustal thickness in central Ellesmere Island decreases from ∼24–30 km in the Eurekan fold and thrust belt (∼79.7°–80.6°N) to ∼16–20 km in the Hazen Stable Block (HSB; ∼80.6°–81.4°N) and is covered by a thick succession of metasediments. A deep crustal root (∼48 km) at ∼79.6°N is interpreted as cratonic crust flexed beneath the Eurekan fold and thrust belt. The Carboniferous to Palaeogene sedimentary succession of the Sverdrup Basin is inferred to be up to 1–4 km thick, comparable to geologically-based estimates, near the western margin of the HSB. |
format |
Article in Journal/Newspaper |
author |
Schiffer, Christian Stephenson, Randell Alexander Oakey, Gordon Jacobsen, Bo Holm |
author_facet |
Schiffer, Christian Stephenson, Randell Alexander Oakey, Gordon Jacobsen, Bo Holm |
author_sort |
Schiffer, Christian |
title |
The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt |
title_short |
The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt |
title_full |
The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt |
title_fullStr |
The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt |
title_full_unstemmed |
The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt |
title_sort |
crustal structure of ellesmere island, arctic canada—teleseismic mapping across a remote intraplate orogenic belt |
publishDate |
2016 |
url |
https://pure.au.dk/portal/da/publications/the-crustal-structure-of-ellesmere-island-arctic-canadateleseismic-mapping-across-a-remote-intraplate-orogenic-belt(3d135602-0d37-4f66-bc38-faccf1c18309).html https://doi.org/10.1093/gji/ggv539 https://pure.au.dk/ws/files/121629267/The_crustal_structure_of_Ellesmere_Island_Arctic_Canada_teleseismic_mapping_across_a_remote_intraplate_orogenic_belt.pdf |
geographic |
Arctic Baffin Bay Canada Ellesmere Island Greenland |
geographic_facet |
Arctic Baffin Bay Canada Ellesmere Island Greenland |
genre |
Arctic Arctic Baffin Bay Baffin Bay Baffin Ellesmere Island Greenland sverdrup basin |
genre_facet |
Arctic Arctic Baffin Bay Baffin Bay Baffin Ellesmere Island Greenland sverdrup basin |
op_source |
Schiffer , C , Stephenson , R A , Oakey , G & Jacobsen , B H 2016 , ' The crustal structure of Ellesmere Island, Arctic Canada—teleseismic mapping across a remote intraplate orogenic belt ' , Geophysical Journal International , vol. 204 , no. 3 , pp. 1579-1600 . https://doi.org/10.1093/gji/ggv539 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/gji/ggv539 |
container_title |
Geophysical Journal International |
container_volume |
204 |
container_issue |
3 |
container_start_page |
1579 |
op_container_end_page |
1600 |
_version_ |
1766297321159524352 |