Upper lithospheric structure in the central Fennoscandian shield: Constraints from P- and S-wave velocity models and VP/VS ratio distribution of the BALTIC wide-angle seismic profile
Abstract The paper presents an analysis of the crust and upper mantle structure in the central Fennoscandian shield based on new P- and S-wave 2D velocity models of the BALTIC wide-angle reflection and refraction profiles. Using reprocessing of the old data, new P- and S-wave velocity models and V P...
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2010
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Online Access: | http://dx.doi.org/10.2478/s11600-010-0002-0 |
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crdegruytopen:10.2478/s11600-010-0002-0 2023-05-15T16:12:52+02:00 Upper lithospheric structure in the central Fennoscandian shield: Constraints from P- and S-wave velocity models and VP/VS ratio distribution of the BALTIC wide-angle seismic profile Janik, Tomasz 2010 http://dx.doi.org/10.2478/s11600-010-0002-0 unknown Walter de Gruyter GmbH Acta Geophysica volume 58, issue 4 ISSN 1895-7455 1895-6572 Geophysics journal-article 2010 crdegruytopen https://doi.org/10.2478/s11600-010-0002-0 2017-05-04T06:25:50Z Abstract The paper presents an analysis of the crust and upper mantle structure in the central Fennoscandian shield based on new P- and S-wave 2D velocity models of the BALTIC wide-angle reflection and refraction profiles. Using reprocessing of the old data, new P- and S-wave velocity models and V P/V S ratio distribution were developed. Moving from SW to NE, the thickness of the crust varies strongly, from ∼36 km to extremely thick, 58–64 km, crossing Wiborg rapakivi massif, Saimaa and Outokumpu areas, and Eastern Finland complex. Based on the lateral variations of V P, V P/V S and thickness of the crust, three main blocks of the crust and upper mantle were distinguished from SW to NE: southwestern, associated with Wiborg rapakivi massif; the central, having the highest thickness of the crust; and the northeastern, not well documented, with Archaean basement. Article in Journal/Newspaper Fennoscandian Sciendo (de Gruyter - via CrossRef) Acta Geophysica 58 4 543 586 |
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Open Polar |
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Sciendo (de Gruyter - via CrossRef) |
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crdegruytopen |
language |
unknown |
topic |
Geophysics |
spellingShingle |
Geophysics Janik, Tomasz Upper lithospheric structure in the central Fennoscandian shield: Constraints from P- and S-wave velocity models and VP/VS ratio distribution of the BALTIC wide-angle seismic profile |
topic_facet |
Geophysics |
description |
Abstract The paper presents an analysis of the crust and upper mantle structure in the central Fennoscandian shield based on new P- and S-wave 2D velocity models of the BALTIC wide-angle reflection and refraction profiles. Using reprocessing of the old data, new P- and S-wave velocity models and V P/V S ratio distribution were developed. Moving from SW to NE, the thickness of the crust varies strongly, from ∼36 km to extremely thick, 58–64 km, crossing Wiborg rapakivi massif, Saimaa and Outokumpu areas, and Eastern Finland complex. Based on the lateral variations of V P, V P/V S and thickness of the crust, three main blocks of the crust and upper mantle were distinguished from SW to NE: southwestern, associated with Wiborg rapakivi massif; the central, having the highest thickness of the crust; and the northeastern, not well documented, with Archaean basement. |
format |
Article in Journal/Newspaper |
author |
Janik, Tomasz |
author_facet |
Janik, Tomasz |
author_sort |
Janik, Tomasz |
title |
Upper lithospheric structure in the central Fennoscandian shield: Constraints from P- and S-wave velocity models and VP/VS ratio distribution of the BALTIC wide-angle seismic profile |
title_short |
Upper lithospheric structure in the central Fennoscandian shield: Constraints from P- and S-wave velocity models and VP/VS ratio distribution of the BALTIC wide-angle seismic profile |
title_full |
Upper lithospheric structure in the central Fennoscandian shield: Constraints from P- and S-wave velocity models and VP/VS ratio distribution of the BALTIC wide-angle seismic profile |
title_fullStr |
Upper lithospheric structure in the central Fennoscandian shield: Constraints from P- and S-wave velocity models and VP/VS ratio distribution of the BALTIC wide-angle seismic profile |
title_full_unstemmed |
Upper lithospheric structure in the central Fennoscandian shield: Constraints from P- and S-wave velocity models and VP/VS ratio distribution of the BALTIC wide-angle seismic profile |
title_sort |
upper lithospheric structure in the central fennoscandian shield: constraints from p- and s-wave velocity models and vp/vs ratio distribution of the baltic wide-angle seismic profile |
publisher |
Walter de Gruyter GmbH |
publishDate |
2010 |
url |
http://dx.doi.org/10.2478/s11600-010-0002-0 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
Acta Geophysica volume 58, issue 4 ISSN 1895-7455 1895-6572 |
op_doi |
https://doi.org/10.2478/s11600-010-0002-0 |
container_title |
Acta Geophysica |
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58 |
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4 |
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543 |
op_container_end_page |
586 |
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1765998471973699584 |