Broadband Seismic Deployments for Imaging the Upper Mantle Structure in the Lützow-Holm Bay Region, East Antarctica
Broadband seismic deployments have been carried out in the Lützow-Holm Bay region (LHB), Dronning Maud Land, East Antarctica. The recorded teleseismic and local events are of sufficient quality to image the structure and dynamics of the crust and mantle of the terrain. Passive seismic studies by rec...
Published in: | International Journal of Geophysics |
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International Journal of Geophysics
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fthindawi:oai:hindawi.com:10.1155/2011/272646 2023-05-15T13:31:44+02:00 Broadband Seismic Deployments for Imaging the Upper Mantle Structure in the Lützow-Holm Bay Region, East Antarctica Masaki Kanao Yusuke Usui Tomofumi Inoue Akira Yamada 2011 https://doi.org/10.1155/2011/272646 en eng International Journal of Geophysics https://doi.org/10.1155/2011/272646 Copyright © 2011 Masaki Kanao et al. Review Article 2011 fthindawi https://doi.org/10.1155/2011/272646 2019-05-25T21:08:10Z Broadband seismic deployments have been carried out in the Lützow-Holm Bay region (LHB), Dronning Maud Land, East Antarctica. The recorded teleseismic and local events are of sufficient quality to image the structure and dynamics of the crust and mantle of the terrain. Passive seismic studies by receiver functions and shear wave splitting suggest a heterogeneous upper mantle. Depth variations in topography for upper mantle discontinuities were derived from long period receiver function, indicating a shallow depth discontinuity at 660 km beneath the continental area of LHB. These results provide evidence of paleo upwelling of the mantle plume associated with Gondwana break-up. SKS splitting analysis anticipated a relationship between “fossil” anisotropy in lithospheric mantle and past tectonics. Moreover, active source surveys (DSSs) imaged lithospheric mantle reflections involving regional tectonic stress during Pan-African and succeeding extension regime at the break-up. By combining the active and passive source studies of the mantle structure, we propose an evolution model of LHB for constructing the present mantle structure. Review Antarc* Antarctica Dronning Maud Land East Antarctica Hindawi Publishing Corporation Dronning Maud Land East Antarctica Lützow-Holm Bay ENVELOPE(38.000,38.000,-69.500,-69.500) International Journal of Geophysics 2011 1 15 |
institution |
Open Polar |
collection |
Hindawi Publishing Corporation |
op_collection_id |
fthindawi |
language |
English |
description |
Broadband seismic deployments have been carried out in the Lützow-Holm Bay region (LHB), Dronning Maud Land, East Antarctica. The recorded teleseismic and local events are of sufficient quality to image the structure and dynamics of the crust and mantle of the terrain. Passive seismic studies by receiver functions and shear wave splitting suggest a heterogeneous upper mantle. Depth variations in topography for upper mantle discontinuities were derived from long period receiver function, indicating a shallow depth discontinuity at 660 km beneath the continental area of LHB. These results provide evidence of paleo upwelling of the mantle plume associated with Gondwana break-up. SKS splitting analysis anticipated a relationship between “fossil” anisotropy in lithospheric mantle and past tectonics. Moreover, active source surveys (DSSs) imaged lithospheric mantle reflections involving regional tectonic stress during Pan-African and succeeding extension regime at the break-up. By combining the active and passive source studies of the mantle structure, we propose an evolution model of LHB for constructing the present mantle structure. |
format |
Review |
author |
Masaki Kanao Yusuke Usui Tomofumi Inoue Akira Yamada |
spellingShingle |
Masaki Kanao Yusuke Usui Tomofumi Inoue Akira Yamada Broadband Seismic Deployments for Imaging the Upper Mantle Structure in the Lützow-Holm Bay Region, East Antarctica |
author_facet |
Masaki Kanao Yusuke Usui Tomofumi Inoue Akira Yamada |
author_sort |
Masaki Kanao |
title |
Broadband Seismic Deployments for Imaging the Upper Mantle Structure in the Lützow-Holm Bay Region, East Antarctica |
title_short |
Broadband Seismic Deployments for Imaging the Upper Mantle Structure in the Lützow-Holm Bay Region, East Antarctica |
title_full |
Broadband Seismic Deployments for Imaging the Upper Mantle Structure in the Lützow-Holm Bay Region, East Antarctica |
title_fullStr |
Broadband Seismic Deployments for Imaging the Upper Mantle Structure in the Lützow-Holm Bay Region, East Antarctica |
title_full_unstemmed |
Broadband Seismic Deployments for Imaging the Upper Mantle Structure in the Lützow-Holm Bay Region, East Antarctica |
title_sort |
broadband seismic deployments for imaging the upper mantle structure in the lützow-holm bay region, east antarctica |
publisher |
International Journal of Geophysics |
publishDate |
2011 |
url |
https://doi.org/10.1155/2011/272646 |
long_lat |
ENVELOPE(38.000,38.000,-69.500,-69.500) |
geographic |
Dronning Maud Land East Antarctica Lützow-Holm Bay |
geographic_facet |
Dronning Maud Land East Antarctica Lützow-Holm Bay |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica |
op_relation |
https://doi.org/10.1155/2011/272646 |
op_rights |
Copyright © 2011 Masaki Kanao et al. |
op_doi |
https://doi.org/10.1155/2011/272646 |
container_title |
International Journal of Geophysics |
container_volume |
2011 |
container_start_page |
1 |
op_container_end_page |
15 |
_version_ |
1766020611443785728 |