Seismological Implication to the Tectonic Evolution of the Lützow-Holm Bay Region (East Antarctica)
Passive source studies using teleseismic events demonstrated heterogeneous structure in the Lützow-Holm Bay (LHB) region, East Antarctica. Depth variations of upper mantle discontinuities (410 and 660 km) were derived from long-period receiver functions by local array stations. Shallow depths in top...
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fttriple:oai:gotriple.eu:10670/1.x6nh8z 2023-05-15T13:57:42+02:00 Seismological Implication to the Tectonic Evolution of the Lützow-Holm Bay Region (East Antarctica) Kanao, Masaki 2018-01-01 https://doi.org/10.5772/intechopen.71972 https://openresearchlibrary.org/ext/api/media/43eb8365-3898-4101-8d5b-a07ce2eabb03/assets/external_content.pdf https://openresearchlibrary.org/viewer/43eb8365-3898-4101-8d5b-a07ce2eabb03 en eng IntechOpen ISBN:9781789231366 doi:10.5772/intechopen.71972 10670/1.x6nh8z https://openresearchlibrary.org/ext/api/media/43eb8365-3898-4101-8d5b-a07ce2eabb03/assets/external_content.pdf https://openresearchlibrary.org/viewer/43eb8365-3898-4101-8d5b-a07ce2eabb03 lic_creative-commons Open Research Library geo archi Book https://vocabularies.coar-repositories.org/resource_types/c_2f33/ 2018 fttriple https://doi.org/10.5772/intechopen.71972 2023-01-22T17:04:03Z Passive source studies using teleseismic events demonstrated heterogeneous structure in the Lützow-Holm Bay (LHB) region, East Antarctica. Depth variations of upper mantle discontinuities (410 and 660 km) were derived from long-period receiver functions by local array stations. Shallow depths in topography of upper mantle discontinuity were cleared beneath the continental ice sheet back azimuth. These results reflect a paleo-upwelling of the mantle plume associated with Gondwana breakup. Lithospheric mantle anisotropy derived by shear waves’ (SKS) splitting anticipated a relationship between “fossil” anisotropy and the past tectonics in NE-SW orientation. Origin of mantle anisotropy was assumed to be caused by supercontinent assembly rather than present asthenospheric flow parallel with absolute plate motion. The deep seismic surveys by active sources, moreover, were carried out over continental ice sheet and provided clear information on crust-mantle boundary, together with inner lithospheric mantle reflections. The extracted lithospheric cross-sectional images by seismic reflection analyses implied tectonic influence of compressive stress during Pan-African age. Book Antarc* Antarctica East Antarctica Ice Sheet Unknown East Antarctica Lützow-Holm Bay ENVELOPE(38.000,38.000,-69.500,-69.500) |
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language |
English |
topic |
geo archi |
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geo archi Kanao, Masaki Seismological Implication to the Tectonic Evolution of the Lützow-Holm Bay Region (East Antarctica) |
topic_facet |
geo archi |
description |
Passive source studies using teleseismic events demonstrated heterogeneous structure in the Lützow-Holm Bay (LHB) region, East Antarctica. Depth variations of upper mantle discontinuities (410 and 660 km) were derived from long-period receiver functions by local array stations. Shallow depths in topography of upper mantle discontinuity were cleared beneath the continental ice sheet back azimuth. These results reflect a paleo-upwelling of the mantle plume associated with Gondwana breakup. Lithospheric mantle anisotropy derived by shear waves’ (SKS) splitting anticipated a relationship between “fossil” anisotropy and the past tectonics in NE-SW orientation. Origin of mantle anisotropy was assumed to be caused by supercontinent assembly rather than present asthenospheric flow parallel with absolute plate motion. The deep seismic surveys by active sources, moreover, were carried out over continental ice sheet and provided clear information on crust-mantle boundary, together with inner lithospheric mantle reflections. The extracted lithospheric cross-sectional images by seismic reflection analyses implied tectonic influence of compressive stress during Pan-African age. |
format |
Book |
author |
Kanao, Masaki |
author_facet |
Kanao, Masaki |
author_sort |
Kanao, Masaki |
title |
Seismological Implication to the Tectonic Evolution of the Lützow-Holm Bay Region (East Antarctica) |
title_short |
Seismological Implication to the Tectonic Evolution of the Lützow-Holm Bay Region (East Antarctica) |
title_full |
Seismological Implication to the Tectonic Evolution of the Lützow-Holm Bay Region (East Antarctica) |
title_fullStr |
Seismological Implication to the Tectonic Evolution of the Lützow-Holm Bay Region (East Antarctica) |
title_full_unstemmed |
Seismological Implication to the Tectonic Evolution of the Lützow-Holm Bay Region (East Antarctica) |
title_sort |
seismological implication to the tectonic evolution of the lützow-holm bay region (east antarctica) |
publisher |
IntechOpen |
publishDate |
2018 |
url |
https://doi.org/10.5772/intechopen.71972 https://openresearchlibrary.org/ext/api/media/43eb8365-3898-4101-8d5b-a07ce2eabb03/assets/external_content.pdf https://openresearchlibrary.org/viewer/43eb8365-3898-4101-8d5b-a07ce2eabb03 |
long_lat |
ENVELOPE(38.000,38.000,-69.500,-69.500) |
geographic |
East Antarctica Lützow-Holm Bay |
geographic_facet |
East Antarctica Lützow-Holm Bay |
genre |
Antarc* Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctica East Antarctica Ice Sheet |
op_source |
Open Research Library |
op_relation |
ISBN:9781789231366 doi:10.5772/intechopen.71972 10670/1.x6nh8z https://openresearchlibrary.org/ext/api/media/43eb8365-3898-4101-8d5b-a07ce2eabb03/assets/external_content.pdf https://openresearchlibrary.org/viewer/43eb8365-3898-4101-8d5b-a07ce2eabb03 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5772/intechopen.71972 |
_version_ |
1766265509973590016 |