Surface wave dispersion, crustal structure, and sediment thickness variations across the Barents shelf
Rayleigh and Love wave group velocities were determined for 21 paths across the Barents shelf. Those group velocities exhibit regional variations of 1.0 km-1 or more at short periods, depending upon the location of the path within the shelf. Only two different crustal shear-velocity models beneath s...
Published in: | Geophysical Journal International |
---|---|
Main Authors: | , |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
1985
|
Subjects: | |
Online Access: | http://gji.oxfordjournals.org/cgi/content/short/80/2/329 https://doi.org/10.1111/j.1365-246X.1985.tb05098.x |
id |
fthighwire:oai:open-archive.highwire.org:gji:80/2/329 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:gji:80/2/329 2023-05-15T17:47:14+02:00 Surface wave dispersion, crustal structure, and sediment thickness variations across the Barents shelf Chan, W. W. Mitchell, B. J. 1985-02-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/80/2/329 https://doi.org/10.1111/j.1365-246X.1985.tb05098.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/80/2/329 http://dx.doi.org/10.1111/j.1365-246X.1985.tb05098.x Copyright (C) 1985, Oxford University Press Articles TEXT 1985 fthighwire https://doi.org/10.1111/j.1365-246X.1985.tb05098.x 2015-02-28T22:51:49Z Rayleigh and Love wave group velocities were determined for 21 paths across the Barents shelf. Those group velocities exhibit regional variations of 1.0 km-1 or more at short periods, depending upon the location of the path within the shelf. Only two different crustal shear-velocity models beneath sedimentary layers are required, however, to explain all of the group velocity data. One model pertains to most of the shelf from a longitude near the eastern coast of Svalbard to Novaya Zemlya. The other pertains to a 200 or 300 km wide region at the western edge of the shelf. Shear velocities in the upper crust of the western region are significantly higher and the crust is much thinner than they are for the rest of the shelf. That region is known to have moved to its present prosition from a point several hundred kilometres to the north during the Caledonian orogeny. Surface wave group velocities within each of the two regions are strongly influenced by sediments which have accumulated in basins within the Barents shelf. Some of these basins, in the southern portion of the shelf, may be 10 km or more in thickness. Text Novaya Zemlya Svalbard HighWire Press (Stanford University) Svalbard Geophysical Journal International 80 2 329 344 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Articles |
spellingShingle |
Articles Chan, W. W. Mitchell, B. J. Surface wave dispersion, crustal structure, and sediment thickness variations across the Barents shelf |
topic_facet |
Articles |
description |
Rayleigh and Love wave group velocities were determined for 21 paths across the Barents shelf. Those group velocities exhibit regional variations of 1.0 km-1 or more at short periods, depending upon the location of the path within the shelf. Only two different crustal shear-velocity models beneath sedimentary layers are required, however, to explain all of the group velocity data. One model pertains to most of the shelf from a longitude near the eastern coast of Svalbard to Novaya Zemlya. The other pertains to a 200 or 300 km wide region at the western edge of the shelf. Shear velocities in the upper crust of the western region are significantly higher and the crust is much thinner than they are for the rest of the shelf. That region is known to have moved to its present prosition from a point several hundred kilometres to the north during the Caledonian orogeny. Surface wave group velocities within each of the two regions are strongly influenced by sediments which have accumulated in basins within the Barents shelf. Some of these basins, in the southern portion of the shelf, may be 10 km or more in thickness. |
format |
Text |
author |
Chan, W. W. Mitchell, B. J. |
author_facet |
Chan, W. W. Mitchell, B. J. |
author_sort |
Chan, W. W. |
title |
Surface wave dispersion, crustal structure, and sediment thickness variations across the Barents shelf |
title_short |
Surface wave dispersion, crustal structure, and sediment thickness variations across the Barents shelf |
title_full |
Surface wave dispersion, crustal structure, and sediment thickness variations across the Barents shelf |
title_fullStr |
Surface wave dispersion, crustal structure, and sediment thickness variations across the Barents shelf |
title_full_unstemmed |
Surface wave dispersion, crustal structure, and sediment thickness variations across the Barents shelf |
title_sort |
surface wave dispersion, crustal structure, and sediment thickness variations across the barents shelf |
publisher |
Oxford University Press |
publishDate |
1985 |
url |
http://gji.oxfordjournals.org/cgi/content/short/80/2/329 https://doi.org/10.1111/j.1365-246X.1985.tb05098.x |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Novaya Zemlya Svalbard |
genre_facet |
Novaya Zemlya Svalbard |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/80/2/329 http://dx.doi.org/10.1111/j.1365-246X.1985.tb05098.x |
op_rights |
Copyright (C) 1985, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.1985.tb05098.x |
container_title |
Geophysical Journal International |
container_volume |
80 |
container_issue |
2 |
container_start_page |
329 |
op_container_end_page |
344 |
_version_ |
1766151603354599424 |