Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR
Combined geological and petrochemical data suggest that the Lapland Granulite Belt can be divided into a lower sedimentary-volcanic unit and an upper, predominantly sedimentary sequence. Metamorphic rocks from the lower parts of the section have given zircon ages of 2.7 - 2.8 Ga. The geochemical sig...
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ftnorgesgu:oai:openarchive.ngu.no:11250/2674264 2023-05-15T17:04:57+02:00 Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR Kozlov, Nikolai E. Ivanov, Andrei A. 1991 application/pdf https://hdl.handle.net/11250/2674264 nor nor NGU Bulletin (421) https://hdl.handle.net/11250/2674264 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 19-32 PREKAMBRIUM DATERING Journal article 1991 ftnorgesgu 2022-07-03T15:26:44Z Combined geological and petrochemical data suggest that the Lapland Granulite Belt can be divided into a lower sedimentary-volcanic unit and an upper, predominantly sedimentary sequence. Metamorphic rocks from the lower parts of the section have given zircon ages of 2.7 - 2.8 Ga. The geochemical signatures of the metavolcanites and metasedimentary rocks suggest that the Lapland granulites are comparable to Phanerozoic island arc complexes. The composition of the pre-Lopian basement blocks is in agreement with this hypothesis. According to our proposed model, the development of the Belt was initiated by underthrusting of the Belomorian block beneath the Kola block. This led to widespread volcanic activity, which was eventually superseded by the sedimen- tary cycle. The complex was then taken down to depths sufficient for metamor- phic transformations in granulite facies; this occured at around 1.9 - 2.0 Ga. 36273 Article in Journal/Newspaper kola peninsula Lapland NGU Open Archive (Geological Survey of Norway) Kola Peninsula |
institution |
Open Polar |
collection |
NGU Open Archive (Geological Survey of Norway) |
op_collection_id |
ftnorgesgu |
language |
Norwegian |
topic |
PREKAMBRIUM DATERING |
spellingShingle |
PREKAMBRIUM DATERING Kozlov, Nikolai E. Ivanov, Andrei A. Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR |
topic_facet |
PREKAMBRIUM DATERING |
description |
Combined geological and petrochemical data suggest that the Lapland Granulite Belt can be divided into a lower sedimentary-volcanic unit and an upper, predominantly sedimentary sequence. Metamorphic rocks from the lower parts of the section have given zircon ages of 2.7 - 2.8 Ga. The geochemical signatures of the metavolcanites and metasedimentary rocks suggest that the Lapland granulites are comparable to Phanerozoic island arc complexes. The composition of the pre-Lopian basement blocks is in agreement with this hypothesis. According to our proposed model, the development of the Belt was initiated by underthrusting of the Belomorian block beneath the Kola block. This led to widespread volcanic activity, which was eventually superseded by the sedimen- tary cycle. The complex was then taken down to depths sufficient for metamor- phic transformations in granulite facies; this occured at around 1.9 - 2.0 Ga. 36273 |
format |
Article in Journal/Newspaper |
author |
Kozlov, Nikolai E. Ivanov, Andrei A. |
author_facet |
Kozlov, Nikolai E. Ivanov, Andrei A. |
author_sort |
Kozlov, Nikolai E. |
title |
Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR |
title_short |
Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR |
title_full |
Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR |
title_fullStr |
Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR |
title_full_unstemmed |
Composition of metamorphic rocks and some aspects of evolution of the Lapland Granulite Belt on the Kola Peninsula, USSR |
title_sort |
composition of metamorphic rocks and some aspects of evolution of the lapland granulite belt on the kola peninsula, ussr |
publishDate |
1991 |
url |
https://hdl.handle.net/11250/2674264 |
geographic |
Kola Peninsula |
geographic_facet |
Kola Peninsula |
genre |
kola peninsula Lapland |
genre_facet |
kola peninsula Lapland |
op_source |
19-32 |
op_relation |
NGU Bulletin (421) https://hdl.handle.net/11250/2674264 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
_version_ |
1766059321732366336 |