Seismological characteristics of the earth's crust of southeastern part of the Phennoscandinavian shield (Russia)
He deep structure of the Arkhangelsk region - Karelia border area was studied by generalizing earlier data, obtained by RWM, DSS and ECWM, and the results of new geological studies carried out by the Institute of Geology, Karelian Research Centre, RAS. The associated results of seismic (RWM, DSS, EC...
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| Date: | 2010 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | Russian |
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S. Subbotin Institute of Geophysics of the NAS of Ukraine
2010
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| Online Access: | https://journals.uran.ua/geofizicheskiy/article/view/117526 |
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| Journal Title: | Geofizicheskiy Zhurnal |
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Geofizicheskiy Zhurnal| _version_ | 1856543344775135232 |
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| author | Sharov, N. V. Kulikov, V.S. Kulikova, V. V. Isanina, E. V. Krupnova, N. A. |
| author_facet | Sharov, N. V. Kulikov, V.S. Kulikova, V. V. Isanina, E. V. Krupnova, N. A. |
| author_sort | Sharov, N. V. |
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| collection | OJS |
| datestamp_date | 2020-10-07T10:58:20Z |
| description | He deep structure of the Arkhangelsk region - Karelia border area was studied by generalizing earlier data, obtained by RWM, DSS and ECWM, and the results of new geological studies carried out by the Institute of Geology, Karelian Research Centre, RAS. The associated results of seismic (RWM, DSS, ECWM) research and other geophysical and geological data are discussed. This integrated approach makes it possible to reveal all principal differences in the seismic parameters of the upper crust in the section interval from the surface to a depth of 5- 7 km and their variation pattern that are due to geological-structural characteristics at the modern erosion section level. An increase in wave velocity near the surface is assumed to be connected with the presence of highly metamorphosed complexes or mafic-ultramafic magmatic rocks. Seismic parameters in the depth range 7-12 to 25-30 km are stable over the entire territory studied, and depth-dependent variations in velocity (maximum velocity in the upper and middle portions of the crust is not more than 6,2-6,5km/s) show an inversion pattern. The rock composition of the Earth's crust to a depth of 25-30 km is assumed to differ negligibly from that of the upper part of the section. A hypothesis of the nature of the crust-mantle transition layer in the region as a relict of the crystallized head portion of a Palaeoproterozoic Windy Belt plume is put forward. The evolution of the region's crust and the directions of large-scale movements in it are shown in general terms. |
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| format | Article |
| id | journalsuranua-geofizicheskiy-article-117526 |
| institution | Geofizicheskiy Zhurnal |
| language | Russian |
| last_indexed | 2025-07-17T11:08:58Z |
| publishDate | 2010 |
| publisher | S. Subbotin Institute of Geophysics of the NAS of Ukraine |
| record_format | ojs |
| spelling | journalsuranua-geofizicheskiy-article-1175262020-10-07T10:58:20Z Seismological characteristics of the earth's crust of southeastern part of the Phennoscandinavian shield (Russia) Sharov, N. V. Kulikov, V.S. Kulikova, V. V. Isanina, E. V. Krupnova, N. A. He deep structure of the Arkhangelsk region - Karelia border area was studied by generalizing earlier data, obtained by RWM, DSS and ECWM, and the results of new geological studies carried out by the Institute of Geology, Karelian Research Centre, RAS. The associated results of seismic (RWM, DSS, ECWM) research and other geophysical and geological data are discussed. This integrated approach makes it possible to reveal all principal differences in the seismic parameters of the upper crust in the section interval from the surface to a depth of 5- 7 km and their variation pattern that are due to geological-structural characteristics at the modern erosion section level. An increase in wave velocity near the surface is assumed to be connected with the presence of highly metamorphosed complexes or mafic-ultramafic magmatic rocks. Seismic parameters in the depth range 7-12 to 25-30 km are stable over the entire territory studied, and depth-dependent variations in velocity (maximum velocity in the upper and middle portions of the crust is not more than 6,2-6,5km/s) show an inversion pattern. The rock composition of the Earth's crust to a depth of 25-30 km is assumed to differ negligibly from that of the upper part of the section. A hypothesis of the nature of the crust-mantle transition layer in the region as a relict of the crystallized head portion of a Palaeoproterozoic Windy Belt plume is put forward. The evolution of the region's crust and the directions of large-scale movements in it are shown in general terms. S. Subbotin Institute of Geophysics of the NAS of Ukraine 2010-06-01 Article Article application/pdf https://journals.uran.ua/geofizicheskiy/article/view/117526 10.24028/gzh.0203-3100.v32i3.2010.117526 Geofizicheskiy Zhurnal; Vol. 32 No. 3 (2010); 3-17 Геофизический журнал; Том 32 № 3 (2010); 3-17 Геофізичний журнал; Том 32 № 3 (2010); 3-17 2524-1052 0203-3100 ru https://journals.uran.ua/geofizicheskiy/article/view/117526/111578 Copyright (c) 2020 Geofizicheskiy Zhurnal https://creativecommons.org/licenses/by/4.0 |
| spellingShingle | Sharov, N. V. Kulikov, V.S. Kulikova, V. V. Isanina, E. V. Krupnova, N. A. Seismological characteristics of the earth's crust of southeastern part of the Phennoscandinavian shield (Russia) |
| title | Seismological characteristics of the earth's crust of southeastern part of the Phennoscandinavian shield (Russia) |
| title_full | Seismological characteristics of the earth's crust of southeastern part of the Phennoscandinavian shield (Russia) |
| title_fullStr | Seismological characteristics of the earth's crust of southeastern part of the Phennoscandinavian shield (Russia) |
| title_full_unstemmed | Seismological characteristics of the earth's crust of southeastern part of the Phennoscandinavian shield (Russia) |
| title_short | Seismological characteristics of the earth's crust of southeastern part of the Phennoscandinavian shield (Russia) |
| title_sort | seismological characteristics of the earth's crust of southeastern part of the phennoscandinavian shield (russia) |
| url | https://journals.uran.ua/geofizicheskiy/article/view/117526 |
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