The crystalline basement of Estonia: rock complexes of the Palaeoproterozoic Orosirian and Statherian and Mesoproterozoic Calymmian periods, and regional correlations
New data on the Fennoscandian Shield and the Baltic area suggest a need for reinterpretation of the stratigraphy of Estonian Precambrian rock complexes. The rocks of the Tallinn Zone formed in the framework of the Fennian orogeny at the margin of the Bergslagen microcontinent 1.90–1.88 Ga ago. The p...
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2009-12-01
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doaj-127c6534c44549c39f5ca419596a143e2020-11-24T21:51:06ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47282009-12-01584219228The crystalline basement of Estonia: rock complexes of the Palaeoproterozoic Orosirian and Statherian and Mesoproterozoic Calymmian periods, and regional correlationsKirs, JuhoPuura, VäinoSoesoo, AlvarKlein, VelloKonsa, MareKoppelmaa, HeinoNiin, MatiUrtson, KristjanNew data on the Fennoscandian Shield and the Baltic area suggest a need for reinterpretation of the stratigraphy of Estonian Precambrian rock complexes. The rocks of the Tallinn Zone formed in the framework of the Fennian orogeny at the margin of the Bergslagen microcontinent 1.90–1.88 Ga ago. The precise age of the Alutaguse Zone is not known. It may have formed either during the 1.93–1.91 Ga Lapland–Savo orogeny or as a rifted eastern part of the Tallinn Zone in the Fennian orogeny. The granulites of western and southern Estonia belong to the volcanic arcs inside the 1.84–1.80 Ga Svecobaltic orogenic belt and show peak metamorphic conditions of 1.78 Ga. Small shoshonitic plutons formed 1.83–1.63 Ga, the small granitic plutons of the Wiborg Rapakivi Subprovince 1.67–1.62 Ga, and the Riga pluton 1.59–1.54 Ga ago.http://eap.ee/public/Estonian_Journal_of_Earth_Sciences/2009/issue_4/earth-2009-4-219-228.pdfgeochronologystratigraphyPrecambrian basementFennoscandiaEstonia |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kirs, Juho Puura, Väino Soesoo, Alvar Klein, Vello Konsa, Mare Koppelmaa, Heino Niin, Mati Urtson, Kristjan |
spellingShingle |
Kirs, Juho Puura, Väino Soesoo, Alvar Klein, Vello Konsa, Mare Koppelmaa, Heino Niin, Mati Urtson, Kristjan The crystalline basement of Estonia: rock complexes of the Palaeoproterozoic Orosirian and Statherian and Mesoproterozoic Calymmian periods, and regional correlations Estonian Journal of Earth Sciences geochronology stratigraphy Precambrian basement Fennoscandia Estonia |
author_facet |
Kirs, Juho Puura, Väino Soesoo, Alvar Klein, Vello Konsa, Mare Koppelmaa, Heino Niin, Mati Urtson, Kristjan |
author_sort |
Kirs, Juho |
title |
The crystalline basement of Estonia: rock complexes of the Palaeoproterozoic Orosirian and Statherian and Mesoproterozoic Calymmian periods, and regional correlations |
title_short |
The crystalline basement of Estonia: rock complexes of the Palaeoproterozoic Orosirian and Statherian and Mesoproterozoic Calymmian periods, and regional correlations |
title_full |
The crystalline basement of Estonia: rock complexes of the Palaeoproterozoic Orosirian and Statherian and Mesoproterozoic Calymmian periods, and regional correlations |
title_fullStr |
The crystalline basement of Estonia: rock complexes of the Palaeoproterozoic Orosirian and Statherian and Mesoproterozoic Calymmian periods, and regional correlations |
title_full_unstemmed |
The crystalline basement of Estonia: rock complexes of the Palaeoproterozoic Orosirian and Statherian and Mesoproterozoic Calymmian periods, and regional correlations |
title_sort |
crystalline basement of estonia: rock complexes of the palaeoproterozoic orosirian and statherian and mesoproterozoic calymmian periods, and regional correlations |
publisher |
Estonian Academy Publishers |
series |
Estonian Journal of Earth Sciences |
issn |
1736-4728 |
publishDate |
2009-12-01 |
description |
New data on the Fennoscandian Shield and the Baltic area suggest a need for reinterpretation of the stratigraphy of Estonian Precambrian rock complexes. The rocks of the Tallinn Zone formed in the framework of the Fennian orogeny at the margin of the Bergslagen microcontinent 1.90–1.88 Ga ago. The precise age of the Alutaguse Zone is not known. It may have formed either during the 1.93–1.91 Ga Lapland–Savo orogeny or as a rifted eastern part of the Tallinn Zone in the Fennian orogeny. The granulites of western and southern Estonia belong to the volcanic arcs inside the 1.84–1.80 Ga Svecobaltic orogenic belt and show peak metamorphic conditions of 1.78 Ga. Small shoshonitic plutons formed 1.83–1.63 Ga, the small granitic plutons of the Wiborg Rapakivi Subprovince 1.67–1.62 Ga, and the Riga pluton 1.59–1.54 Ga ago. |
topic |
geochronology stratigraphy Precambrian basement Fennoscandia Estonia |
url |
http://eap.ee/public/Estonian_Journal_of_Earth_Sciences/2009/issue_4/earth-2009-4-219-228.pdf |
work_keys_str_mv |
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