HETEROGENEOUS LITHOSPHERIC STRUCTURE OF THE FENNOSCANDIAN SHIELD: SEISMIC DATA
A generalization has been obtained based on the data for deep seismic studies on longitudinal DSS profiles (explosion seismology) and seismological evidence found for local and distant earthquakes (earthquake seismology) in the Fennoscandian Shield over the past 40 years. This provided an opportunit...
Published in: | Geodynamics & Tectonophysics |
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Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust
2022
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Online Access: | https://doi.org/10.5800/GT-2022-13-1-0569 https://doaj.org/article/9d41dc94069b41d78ae79eb1f976d3e5 |
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ftdoajarticles:oai:doaj.org/article:9d41dc94069b41d78ae79eb1f976d3e5 2023-05-15T16:12:45+02:00 HETEROGENEOUS LITHOSPHERIC STRUCTURE OF THE FENNOSCANDIAN SHIELD: SEISMIC DATA N. V. Sharov A. A. Lebedev 2022-03-01T00:00:00Z https://doi.org/10.5800/GT-2022-13-1-0569 https://doaj.org/article/9d41dc94069b41d78ae79eb1f976d3e5 EN RU eng rus Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust https://www.gt-crust.ru/jour/article/view/1421 https://doaj.org/toc/2078-502X 2078-502X doi:10.5800/GT-2022-13-1-0569 https://doaj.org/article/9d41dc94069b41d78ae79eb1f976d3e5 Геодинамика и тектонофизика, Vol 13, Iss 1 (2022) fennoscandian shield earth’s crust upper mantle seismic model m-discontinuity superdeep drilling precambrian shield Science Q article 2022 ftdoajarticles https://doi.org/10.5800/GT-2022-13-1-0569 2022-12-30T21:41:08Z A generalization has been obtained based on the data for deep seismic studies on longitudinal DSS profiles (explosion seismology) and seismological evidence found for local and distant earthquakes (earthquake seismology) in the Fennoscandian Shield over the past 40 years. This provided an opportunity to obtaine quantitative data on the horizontal and vertical heterogeneities of the lithosphere. 3D seismological models were first constructed for the individual parts of the Fennoscandian Shield which show that the crystalline crust structure acquires a block hierarchy pattern, with no persistent seismic boundaries found within the entire shield. The upper crust is characterized by the local occurrence of both waveguides and high-velocity zones correlated with geological bodies. The structural plans of the velocity isolines of various deep sections were found to be inconsistent. It has been proved that major geotectonic provinces have a thick crust and that the Early Proterozoic volcanogenic belts are characterized by elevated velocities and a large crustal thickness. In the upper mantle of the Fennoscandian Shield there were identified the layers with anomalously high velocities. No robust evidence was found for a waveguide, which is sometimes related to the concept of the lithosphere. Article in Journal/Newspaper Fennoscandian Directory of Open Access Journals: DOAJ Articles Geodynamics & Tectonophysics 13 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
fennoscandian shield earth’s crust upper mantle seismic model m-discontinuity superdeep drilling precambrian shield Science Q |
spellingShingle |
fennoscandian shield earth’s crust upper mantle seismic model m-discontinuity superdeep drilling precambrian shield Science Q N. V. Sharov A. A. Lebedev HETEROGENEOUS LITHOSPHERIC STRUCTURE OF THE FENNOSCANDIAN SHIELD: SEISMIC DATA |
topic_facet |
fennoscandian shield earth’s crust upper mantle seismic model m-discontinuity superdeep drilling precambrian shield Science Q |
description |
A generalization has been obtained based on the data for deep seismic studies on longitudinal DSS profiles (explosion seismology) and seismological evidence found for local and distant earthquakes (earthquake seismology) in the Fennoscandian Shield over the past 40 years. This provided an opportunity to obtaine quantitative data on the horizontal and vertical heterogeneities of the lithosphere. 3D seismological models were first constructed for the individual parts of the Fennoscandian Shield which show that the crystalline crust structure acquires a block hierarchy pattern, with no persistent seismic boundaries found within the entire shield. The upper crust is characterized by the local occurrence of both waveguides and high-velocity zones correlated with geological bodies. The structural plans of the velocity isolines of various deep sections were found to be inconsistent. It has been proved that major geotectonic provinces have a thick crust and that the Early Proterozoic volcanogenic belts are characterized by elevated velocities and a large crustal thickness. In the upper mantle of the Fennoscandian Shield there were identified the layers with anomalously high velocities. No robust evidence was found for a waveguide, which is sometimes related to the concept of the lithosphere. |
format |
Article in Journal/Newspaper |
author |
N. V. Sharov A. A. Lebedev |
author_facet |
N. V. Sharov A. A. Lebedev |
author_sort |
N. V. Sharov |
title |
HETEROGENEOUS LITHOSPHERIC STRUCTURE OF THE FENNOSCANDIAN SHIELD: SEISMIC DATA |
title_short |
HETEROGENEOUS LITHOSPHERIC STRUCTURE OF THE FENNOSCANDIAN SHIELD: SEISMIC DATA |
title_full |
HETEROGENEOUS LITHOSPHERIC STRUCTURE OF THE FENNOSCANDIAN SHIELD: SEISMIC DATA |
title_fullStr |
HETEROGENEOUS LITHOSPHERIC STRUCTURE OF THE FENNOSCANDIAN SHIELD: SEISMIC DATA |
title_full_unstemmed |
HETEROGENEOUS LITHOSPHERIC STRUCTURE OF THE FENNOSCANDIAN SHIELD: SEISMIC DATA |
title_sort |
heterogeneous lithospheric structure of the fennoscandian shield: seismic data |
publisher |
Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust |
publishDate |
2022 |
url |
https://doi.org/10.5800/GT-2022-13-1-0569 https://doaj.org/article/9d41dc94069b41d78ae79eb1f976d3e5 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
Геодинамика и тектонофизика, Vol 13, Iss 1 (2022) |
op_relation |
https://www.gt-crust.ru/jour/article/view/1421 https://doaj.org/toc/2078-502X 2078-502X doi:10.5800/GT-2022-13-1-0569 https://doaj.org/article/9d41dc94069b41d78ae79eb1f976d3e5 |
op_doi |
https://doi.org/10.5800/GT-2022-13-1-0569 |
container_title |
Geodynamics & Tectonophysics |
container_volume |
13 |
container_issue |
1 |
_version_ |
1765998348620267520 |