Imaging the East European Craton margin in northern Poland using extended correlation processing of regional seismic reflection profiles
In NE Poland, Eastern European Craton (EEC) crust of Fennoscandian affinity is concealed under a Phanerozoic platform cover and penetrated by sparse, deep research wells. Most of the inferences regarding its structure rely on geophysical data. Until recently, this area was covered only by the wide-a...
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ftdoajarticles:oai:doaj.org/article:27bcac2ef24e40218be2d3d6ae22ae8c 2023-05-15T16:13:08+02:00 Imaging the East European Craton margin in northern Poland using extended correlation processing of regional seismic reflection profiles M. Mężyk M. Malinowski S. Mazur 2019-05-01T00:00:00Z https://doi.org/10.5194/se-10-683-2019 https://doaj.org/article/27bcac2ef24e40218be2d3d6ae22ae8c EN eng Copernicus Publications https://www.solid-earth.net/10/683/2019/se-10-683-2019.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 doi:10.5194/se-10-683-2019 1869-9510 1869-9529 https://doaj.org/article/27bcac2ef24e40218be2d3d6ae22ae8c Solid Earth, Vol 10, Pp 683-696 (2019) Geology QE1-996.5 Stratigraphy QE640-699 article 2019 ftdoajarticles https://doi.org/10.5194/se-10-683-2019 2022-12-31T00:24:13Z In NE Poland, Eastern European Craton (EEC) crust of Fennoscandian affinity is concealed under a Phanerozoic platform cover and penetrated by sparse, deep research wells. Most of the inferences regarding its structure rely on geophysical data. Until recently, this area was covered only by the wide-angle reflection and refraction (WARR) profiles, which show a relatively simple crustal structure with a typical three-layer cratonic crust. ION Geophysical PolandSPAN ™ regional seismic programme data, acquired over the marginal part of the EEC in Poland, offered a unique opportunity to derive a detailed image of the deeper crust. Here, we apply extended correlation processing to a subset ( ∼950 km) of the PolandSPAN ™ dataset located in NE Poland, which enabled us to extend the nominal record length of the acquired data from 12 to 22 s ( ∼60 km of depth). Our new processing revealed reflectivity patterns, which we primarily associate with the Paleoproterozoic crust formed during the Svekofennian (Svekobaltic) orogeny, that are similar to those observed along the BABEL and FIRE profiles in the Baltic Sea and Finland, respectively. We propose a mid- to lower-crustal, orogeny-normal lateral flow model to explain the occurrence of two sets of structures that can be collectively interpreted as kilometre-scale S–C ′ shear zones. The structures define a penetrative deformation fabric invoking ductile extension of hot orogenic crust in a convergent setting. Localized reactivation of these structures provided conduits for subsequent emplacement of gabbroic magma that produced a Mesoproterozoic anorthosite–mangerite–charnockite–granite (AMCG) suite in NE Poland. Delamination of thickened orogenic lithosphere may have accounted for magmatic underplating and fractionation into the AMCG plutons. We also found sub-Moho dipping mantle reflectivity, which we tentatively explain as a signature of the crustal accretion during the Svekofennian orogeny. Later tectonic phases (e.g. Ediacaran rifting, Caledonian orogeny) did not leave a ... Article in Journal/Newspaper Fennoscandian Directory of Open Access Journals: DOAJ Articles Babel ENVELOPE(-61.401,-61.401,-63.885,-63.885) Solid Earth 10 3 683 696 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Stratigraphy QE640-699 |
spellingShingle |
Geology QE1-996.5 Stratigraphy QE640-699 M. Mężyk M. Malinowski S. Mazur Imaging the East European Craton margin in northern Poland using extended correlation processing of regional seismic reflection profiles |
topic_facet |
Geology QE1-996.5 Stratigraphy QE640-699 |
description |
In NE Poland, Eastern European Craton (EEC) crust of Fennoscandian affinity is concealed under a Phanerozoic platform cover and penetrated by sparse, deep research wells. Most of the inferences regarding its structure rely on geophysical data. Until recently, this area was covered only by the wide-angle reflection and refraction (WARR) profiles, which show a relatively simple crustal structure with a typical three-layer cratonic crust. ION Geophysical PolandSPAN ™ regional seismic programme data, acquired over the marginal part of the EEC in Poland, offered a unique opportunity to derive a detailed image of the deeper crust. Here, we apply extended correlation processing to a subset ( ∼950 km) of the PolandSPAN ™ dataset located in NE Poland, which enabled us to extend the nominal record length of the acquired data from 12 to 22 s ( ∼60 km of depth). Our new processing revealed reflectivity patterns, which we primarily associate with the Paleoproterozoic crust formed during the Svekofennian (Svekobaltic) orogeny, that are similar to those observed along the BABEL and FIRE profiles in the Baltic Sea and Finland, respectively. We propose a mid- to lower-crustal, orogeny-normal lateral flow model to explain the occurrence of two sets of structures that can be collectively interpreted as kilometre-scale S–C ′ shear zones. The structures define a penetrative deformation fabric invoking ductile extension of hot orogenic crust in a convergent setting. Localized reactivation of these structures provided conduits for subsequent emplacement of gabbroic magma that produced a Mesoproterozoic anorthosite–mangerite–charnockite–granite (AMCG) suite in NE Poland. Delamination of thickened orogenic lithosphere may have accounted for magmatic underplating and fractionation into the AMCG plutons. We also found sub-Moho dipping mantle reflectivity, which we tentatively explain as a signature of the crustal accretion during the Svekofennian orogeny. Later tectonic phases (e.g. Ediacaran rifting, Caledonian orogeny) did not leave a ... |
format |
Article in Journal/Newspaper |
author |
M. Mężyk M. Malinowski S. Mazur |
author_facet |
M. Mężyk M. Malinowski S. Mazur |
author_sort |
M. Mężyk |
title |
Imaging the East European Craton margin in northern Poland using extended correlation processing of regional seismic reflection profiles |
title_short |
Imaging the East European Craton margin in northern Poland using extended correlation processing of regional seismic reflection profiles |
title_full |
Imaging the East European Craton margin in northern Poland using extended correlation processing of regional seismic reflection profiles |
title_fullStr |
Imaging the East European Craton margin in northern Poland using extended correlation processing of regional seismic reflection profiles |
title_full_unstemmed |
Imaging the East European Craton margin in northern Poland using extended correlation processing of regional seismic reflection profiles |
title_sort |
imaging the east european craton margin in northern poland using extended correlation processing of regional seismic reflection profiles |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/se-10-683-2019 https://doaj.org/article/27bcac2ef24e40218be2d3d6ae22ae8c |
long_lat |
ENVELOPE(-61.401,-61.401,-63.885,-63.885) |
geographic |
Babel |
geographic_facet |
Babel |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
Solid Earth, Vol 10, Pp 683-696 (2019) |
op_relation |
https://www.solid-earth.net/10/683/2019/se-10-683-2019.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 doi:10.5194/se-10-683-2019 1869-9510 1869-9529 https://doaj.org/article/27bcac2ef24e40218be2d3d6ae22ae8c |
op_doi |
https://doi.org/10.5194/se-10-683-2019 |
container_title |
Solid Earth |
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10 |
container_issue |
3 |
container_start_page |
683 |
op_container_end_page |
696 |
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1765998749761404928 |