Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform
[ 1] The Davis Strait transform margin was studied using a 630-km-long wide-angle reflection/ refraction seismic transect extending from SE Baffin Island to Greenland. Dense airgun shots were recorded by 28 ocean bottom seismometers deployed along the line. A P wave velocity model was developed from...
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ftdalhouse:oai:DalSpace.library.dal.ca:10222/26951 2023-05-15T15:35:22+02:00 Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform Funck, Thomas Jackson, H. Ruth Louden, Keith E. Klingelhoefer, Frauke 2013-06-19T18:01:14Z https://doi.org/10.1029/2006JB004308 http://hdl.handle.net/10222/26951 unknown Journal of Geophysical Research-Solid Earth Funck, Thomas, H. Ruth Jackson, Keith E. Louden, and Frauke Klingelhoefer. 2007. "Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform." Journal of Geophysical Research-Solid Earth 112(B4): 04402-B04402. DOI:10.1029/2006JB004308 0148-0227 http://dx.doi.org/10.1029/2006JB004308 http://hdl.handle.net/10222/26951 112 4 04402 This paper was published by AGU. Copyright 2007 American Geophysical Union article 2013 ftdalhouse https://doi.org/10.1029/2006JB004308 2021-12-29T18:08:42Z [ 1] The Davis Strait transform margin was studied using a 630-km-long wide-angle reflection/ refraction seismic transect extending from SE Baffin Island to Greenland. Dense airgun shots were recorded by 28 ocean bottom seismometers deployed along the line. A P wave velocity model was developed from forward and inverse modeling of the wide-angle data and incorporation of coincident deep multichannel reflection seismic data. Off Baffin Island in the Saglek Basin, 7 to 11-km-thick two-layered continental crust (5.8 - 6.6 km/s) is observed. Off Greenland, continental crust is divided into three layers (5.4 - 6.8 km/s) with a maximum thickness of 20 km. Farther offshore Greenland the crust thins to 7 - 12 km and the lower crust disappears. Between the continental blocks a 140-km-wide zone with oceanic crust ( layer 2 is 5.4 - 6.2 km/s and layer 3 is 6.7 - 7.0 km/s) is located. The western half of this zone is interpreted to be part of a volcanic margin with seaward dipping reflectors; the eastern part is associated with the Ungava fault zone (UFZ), the major transform fault in Davis Strait. The UFZ thus acted as leaky transform fault during phases of transtension. Southward flow of material from the Iceland plume created a 4 to 8-km-thick underplated layer (7.4 km/s) beneath the thinned portions of the continental crust and beneath previously emplaced oceanic crust. Plume related Paleogene volcanism is indicated by an up to 4-km thick layer (4.3 - 5.8 km/s) with basalts and interbedded sediments that can be traced from SE Baffin Island 400 km toward the east. Article in Journal/Newspaper Baffin Island Baffin Davis Strait Greenland Iceland Dalhousie University: DalSpace Institutional Repository Baffin Island Canada Greenland Journal of Geophysical Research: Solid Earth 112 B4 |
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Dalhousie University: DalSpace Institutional Repository |
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[ 1] The Davis Strait transform margin was studied using a 630-km-long wide-angle reflection/ refraction seismic transect extending from SE Baffin Island to Greenland. Dense airgun shots were recorded by 28 ocean bottom seismometers deployed along the line. A P wave velocity model was developed from forward and inverse modeling of the wide-angle data and incorporation of coincident deep multichannel reflection seismic data. Off Baffin Island in the Saglek Basin, 7 to 11-km-thick two-layered continental crust (5.8 - 6.6 km/s) is observed. Off Greenland, continental crust is divided into three layers (5.4 - 6.8 km/s) with a maximum thickness of 20 km. Farther offshore Greenland the crust thins to 7 - 12 km and the lower crust disappears. Between the continental blocks a 140-km-wide zone with oceanic crust ( layer 2 is 5.4 - 6.2 km/s and layer 3 is 6.7 - 7.0 km/s) is located. The western half of this zone is interpreted to be part of a volcanic margin with seaward dipping reflectors; the eastern part is associated with the Ungava fault zone (UFZ), the major transform fault in Davis Strait. The UFZ thus acted as leaky transform fault during phases of transtension. Southward flow of material from the Iceland plume created a 4 to 8-km-thick underplated layer (7.4 km/s) beneath the thinned portions of the continental crust and beneath previously emplaced oceanic crust. Plume related Paleogene volcanism is indicated by an up to 4-km thick layer (4.3 - 5.8 km/s) with basalts and interbedded sediments that can be traced from SE Baffin Island 400 km toward the east. |
format |
Article in Journal/Newspaper |
author |
Funck, Thomas Jackson, H. Ruth Louden, Keith E. Klingelhoefer, Frauke |
spellingShingle |
Funck, Thomas Jackson, H. Ruth Louden, Keith E. Klingelhoefer, Frauke Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform |
author_facet |
Funck, Thomas Jackson, H. Ruth Louden, Keith E. Klingelhoefer, Frauke |
author_sort |
Funck, Thomas |
title |
Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform |
title_short |
Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform |
title_full |
Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform |
title_fullStr |
Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform |
title_full_unstemmed |
Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform |
title_sort |
seismic study of the transform-rifted margin in davis strait between baffin island (canada) and greenland: what happens when a plume meets a transform |
publishDate |
2013 |
url |
https://doi.org/10.1029/2006JB004308 http://hdl.handle.net/10222/26951 |
geographic |
Baffin Island Canada Greenland |
geographic_facet |
Baffin Island Canada Greenland |
genre |
Baffin Island Baffin Davis Strait Greenland Iceland |
genre_facet |
Baffin Island Baffin Davis Strait Greenland Iceland |
op_relation |
Journal of Geophysical Research-Solid Earth Funck, Thomas, H. Ruth Jackson, Keith E. Louden, and Frauke Klingelhoefer. 2007. "Seismic study of the transform-rifted margin in Davis Strait between Baffin Island (Canada) and Greenland: What happens when a plume meets a transform." Journal of Geophysical Research-Solid Earth 112(B4): 04402-B04402. DOI:10.1029/2006JB004308 0148-0227 http://dx.doi.org/10.1029/2006JB004308 http://hdl.handle.net/10222/26951 112 4 04402 |
op_rights |
This paper was published by AGU. Copyright 2007 American Geophysical Union |
op_doi |
https://doi.org/10.1029/2006JB004308 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
112 |
container_issue |
B4 |
_version_ |
1766365708174753792 |