A three-dimensional model of the Early Precambrian crust under the southeastern Fennoscandian Shield: Karelia craton and Belomorian tectonic province
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| Title: | A three-dimensional model of the Early Precambrian crust under the southeastern Fennoscandian Shield: Karelia craton and Belomorian tectonic province |
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| Authors: | Mints, M.1 mints@ginras.ru, Suleimanov, A.2, Zamozhniaya, N.2, Stupak, V.2 |
| Source: | Tectonophysics. Jul2009, Vol. 472 Issue 1-4, p323-339. 17p. |
| Subjects: | Precambrian stratigraphic geology, Continental crust, Cratons, Structural geology, Seismic reflection method |
| Geographic Terms: | Baltic Shield, Karelia (Russia), Russia |
| Abstract: | Abstract: The Early Precambrian structures of the Archaean Karelia craton and Belomorian tectonic province have been investigated by reflection seismology. Integration of the existing geological database for these two entities and adjacent tectonic units with the seismic data for the crust and upper mantle along the 1-EU geotraverse and cross-traverse 4B totaling c.1300 km allows development of a three-dimensional model of the deep structure of the southeastern Fennoscandian Shield. Interpretation of the seismic data provides evidence that the Early Precambrian crust is characterized by inclined layering. The crustal architecture is a combination of thrust–nappe and thrust–underthrust structural assemblages consisting of Neoarchaean and Palaeoproterozoic rocks that were subsequently further deformed during uplift and emplacement of granite-gneiss domes. The new model substantially modifies previous conceptions of this part of the shield as being constituted of blocks with sub-vertical margins and individual internal layering. It is apparent that the surface traces of gently dipping boundaries are defined by the erosion level and consequently these boundaries are not those of particular “tectonic blocks” in the traditional sense. [Copyright &y& Elsevier] |
| Copyright of Tectonophysics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 41582750 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A three-dimensional model of the Early Precambrian crust under the southeastern Fennoscandian Shield: Karelia craton and Belomorian tectonic province – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Mints%2C+M%2E%22">Mints, M.</searchLink><relatesTo>1</relatesTo><i> mints@ginras.ru</i><br /><searchLink fieldCode="AR" term="%22Suleimanov%2C+A%2E%22">Suleimanov, A.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Zamozhniaya%2C+N%2E%22">Zamozhniaya, N.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Stupak%2C+V%2E%22">Stupak, V.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Tectonophysics%22">Tectonophysics</searchLink>. Jul2009, Vol. 472 Issue 1-4, p323-339. 17p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Precambrian+stratigraphic+geology%22">Precambrian stratigraphic geology</searchLink><br /><searchLink fieldCode="DE" term="%22Continental+crust%22">Continental crust</searchLink><br /><searchLink fieldCode="DE" term="%22Cratons%22">Cratons</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+geology%22">Structural geology</searchLink><br /><searchLink fieldCode="DE" term="%22Seismic+reflection+method%22">Seismic reflection method</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Baltic+Shield%22">Baltic Shield</searchLink><br /><searchLink fieldCode="DE" term="%22Karelia+%28Russia%29%22">Karelia (Russia)</searchLink><br /><searchLink fieldCode="DE" term="%22Russia%22">Russia</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: The Early Precambrian structures of the Archaean Karelia craton and Belomorian tectonic province have been investigated by reflection seismology. Integration of the existing geological database for these two entities and adjacent tectonic units with the seismic data for the crust and upper mantle along the 1-EU geotraverse and cross-traverse 4B totaling c.1300 km allows development of a three-dimensional model of the deep structure of the southeastern Fennoscandian Shield. Interpretation of the seismic data provides evidence that the Early Precambrian crust is characterized by inclined layering. The crustal architecture is a combination of thrust–nappe and thrust–underthrust structural assemblages consisting of Neoarchaean and Palaeoproterozoic rocks that were subsequently further deformed during uplift and emplacement of granite-gneiss domes. The new model substantially modifies previous conceptions of this part of the shield as being constituted of blocks with sub-vertical margins and individual internal layering. It is apparent that the surface traces of gently dipping boundaries are defined by the erosion level and consequently these boundaries are not those of particular “tectonic blocks” in the traditional sense. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Tectonophysics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.tecto.2008.12.008 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 17 StartPage: 323 Subjects: – SubjectFull: Precambrian stratigraphic geology Type: general – SubjectFull: Continental crust Type: general – SubjectFull: Cratons Type: general – SubjectFull: Structural geology Type: general – SubjectFull: Seismic reflection method Type: general – SubjectFull: Baltic Shield Type: general – SubjectFull: Karelia (Russia) Type: general – SubjectFull: Russia Type: general Titles: – TitleFull: A three-dimensional model of the Early Precambrian crust under the southeastern Fennoscandian Shield: Karelia craton and Belomorian tectonic province Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Mints, M. – PersonEntity: Name: NameFull: Suleimanov, A. – PersonEntity: Name: NameFull: Zamozhniaya, N. – PersonEntity: Name: NameFull: Stupak, V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2009 Type: published Y: 2009 Identifiers: – Type: issn-print Value: 00401951 Numbering: – Type: volume Value: 472 – Type: issue Value: 1-4 Titles: – TitleFull: Tectonophysics Type: main |
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