Review of seismicity and other geophysical data near Nares Strait
Nares Strait is aseismic even to small magnitude levels, in contrast to nearby active areas in Baffin Bay, the Lincoln Sea and the Sverdrup Basin. Activity immediately to the south of the Strait is infrequent and minor. The nature of Lg propagation suggests a discontinuity in the continental crust a...
Published in: | Meddelelser om Grønland. Geoscience |
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Language: | English |
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The Commission for Scientific Research in Greenland /Danish Polar Center
1982
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Online Access: | https://tidsskrift.dk/meddrgroenland_geosci/article/view/139586 |
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ftsbaarhusojs:oai:ojs.tidsskrift.dk:article/139586 2024-01-28T10:04:38+01:00 Review of seismicity and other geophysical data near Nares Strait Wetmiller, Robert J. Forsyth, David A. 1982-06-10 application/pdf https://tidsskrift.dk/meddrgroenland_geosci/article/view/139586 eng eng The Commission for Scientific Research in Greenland /Danish Polar Center https://tidsskrift.dk/meddrgroenland_geosci/article/view/139586/183602 https://tidsskrift.dk/meddrgroenland_geosci/article/view/139586 Meddelelser om Grønland. Geoscience; Vol. 8 (1982): Meddelelser om Grønland. Geoscience; 261-274 Meddelelser om Grønland. Geoscience; Årg. 8 (1982): Meddelelser om Grønland, Geoscience; 261-274 1600-4590 0106-1046 10.7146/moggeosci.v8i info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1982 ftsbaarhusojs https://doi.org/10.7146/moggeosci.v8i 2024-01-03T23:59:20Z Nares Strait is aseismic even to small magnitude levels, in contrast to nearby active areas in Baffin Bay, the Lincoln Sea and the Sverdrup Basin. Activity immediately to the south of the Strait is infrequent and minor. The nature of Lg propagation suggests a discontinuity in the continental crust at the southern terminus of Nares Strait while seismicity in the Lincoln Sea seems most logically related to an extension of the activity in the Sverdrup Basin. Intense seismic activity in Baffin Bay appears to be confined south of latitude 75°N. Focal mechanisms for recent earthquakes in Baffin Bay and north of Greenland do not support the hypothesis of large left-lateral displacements along Nares Strait. Free air gravity anomalies indicate that some of the seismicity of northern Baffin Bay and Baffin Island may be related to glacial rebound or uncompensated sedimentary loads acting on zones of weakness. The aseismic nature of Nares Strait under the action of stresses due to local glacial unloading or regional north-south compression argues against the presence of a relatively young shear zone of major crustal or lithospheric dimension. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Island Baffin Greenland Lincoln Sea Nares strait sverdrup basin Aarhus University: OJS at The State and University Library Baffin Bay Baffin Island Greenland Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Meddelelser om Grønland. Geoscience 8 |
institution |
Open Polar |
collection |
Aarhus University: OJS at The State and University Library |
op_collection_id |
ftsbaarhusojs |
language |
English |
description |
Nares Strait is aseismic even to small magnitude levels, in contrast to nearby active areas in Baffin Bay, the Lincoln Sea and the Sverdrup Basin. Activity immediately to the south of the Strait is infrequent and minor. The nature of Lg propagation suggests a discontinuity in the continental crust at the southern terminus of Nares Strait while seismicity in the Lincoln Sea seems most logically related to an extension of the activity in the Sverdrup Basin. Intense seismic activity in Baffin Bay appears to be confined south of latitude 75°N. Focal mechanisms for recent earthquakes in Baffin Bay and north of Greenland do not support the hypothesis of large left-lateral displacements along Nares Strait. Free air gravity anomalies indicate that some of the seismicity of northern Baffin Bay and Baffin Island may be related to glacial rebound or uncompensated sedimentary loads acting on zones of weakness. The aseismic nature of Nares Strait under the action of stresses due to local glacial unloading or regional north-south compression argues against the presence of a relatively young shear zone of major crustal or lithospheric dimension. |
format |
Article in Journal/Newspaper |
author |
Wetmiller, Robert J. Forsyth, David A. |
spellingShingle |
Wetmiller, Robert J. Forsyth, David A. Review of seismicity and other geophysical data near Nares Strait |
author_facet |
Wetmiller, Robert J. Forsyth, David A. |
author_sort |
Wetmiller, Robert J. |
title |
Review of seismicity and other geophysical data near Nares Strait |
title_short |
Review of seismicity and other geophysical data near Nares Strait |
title_full |
Review of seismicity and other geophysical data near Nares Strait |
title_fullStr |
Review of seismicity and other geophysical data near Nares Strait |
title_full_unstemmed |
Review of seismicity and other geophysical data near Nares Strait |
title_sort |
review of seismicity and other geophysical data near nares strait |
publisher |
The Commission for Scientific Research in Greenland /Danish Polar Center |
publishDate |
1982 |
url |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/139586 |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) |
geographic |
Baffin Bay Baffin Island Greenland Nares |
geographic_facet |
Baffin Bay Baffin Island Greenland Nares |
genre |
Baffin Bay Baffin Bay Baffin Island Baffin Greenland Lincoln Sea Nares strait sverdrup basin |
genre_facet |
Baffin Bay Baffin Bay Baffin Island Baffin Greenland Lincoln Sea Nares strait sverdrup basin |
op_source |
Meddelelser om Grønland. Geoscience; Vol. 8 (1982): Meddelelser om Grønland. Geoscience; 261-274 Meddelelser om Grønland. Geoscience; Årg. 8 (1982): Meddelelser om Grønland, Geoscience; 261-274 1600-4590 0106-1046 10.7146/moggeosci.v8i |
op_relation |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/139586/183602 https://tidsskrift.dk/meddrgroenland_geosci/article/view/139586 |
op_doi |
https://doi.org/10.7146/moggeosci.v8i |
container_title |
Meddelelser om Grønland. Geoscience |
container_volume |
8 |
_version_ |
1789330402950774784 |