Geochemical types of subvolcanic dacite – rhyolite complexes from the сentral part of the Vedlozero-Segozero greenstone belt (Karelian Craton)
The paper presents the results of detailed geological, petrographic and geochemical studies of Archean acidic subvolcanic rocks from the Koikary domain located in the central part of the Vedlozero-Segozero greenstone belt. Three petrologically contrasting groups are clearly distinguished in the inve...
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ftdoajarticles:oai:doaj.org/article:06dda8a5d0024a6a8f699eb3cbcf6132 2023-05-15T17:01:33+02:00 Geochemical types of subvolcanic dacite – rhyolite complexes from the сentral part of the Vedlozero-Segozero greenstone belt (Karelian Craton) Максим Александрович Гоголев Maxim Gogolev 2018-02-01T00:00:00Z https://doi.org/10.17076/geo757 https://doaj.org/article/06dda8a5d0024a6a8f699eb3cbcf6132 EN RU eng rus Karelian Research Centre of the Russian Academy of Sciences http://journals.krc.karelia.ru/index.php/precambrian/article/view/757 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/geo757 https://doaj.org/article/06dda8a5d0024a6a8f699eb3cbcf6132 Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Vol 0, Iss 11 (2018) архей дациты риолиты геохимия зеленокаменный пояс Science Q article 2018 ftdoajarticles https://doi.org/10.17076/geo757 2022-12-31T09:28:50Z The paper presents the results of detailed geological, petrographic and geochemical studies of Archean acidic subvolcanic rocks from the Koikary domain located in the central part of the Vedlozero-Segozero greenstone belt. Three petrologically contrasting groups are clearly distinguished in the investigated dacite-rhyolite association: 1) dacite with high content of Cr, Ni, Ti, Nb, and heavy REE, which are characterized by εNd (2935 Ma) from +0.72 to +2.93 and contain porphyritic phenocrysts of several generations; 2) rhyolite with a strongly fractionated REE distribution, negative anomalies in Nb, Sr and Ti, and with εNd (2935 Ma) from +1.15 to +3.37; 3) dacite and rhyolite with a moderately fractionated REE distribution, negative anomalies in Nb, Sr and Ti, and with εNd (2935 Ma) = –6.47. The above mentioned features of the rocks reflect the contrasting conditions of generation of acidic subvolcanic rocks in the Koikary domain and mark different time stages of the greenstone belt development. Article in Journal/Newspaper karelian Directory of Open Access Journals: DOAJ Articles Proceedings of the Karelian Research Centre of the Russian Academy of Sciences 11 82 |
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архей дациты риолиты геохимия зеленокаменный пояс Science Q |
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архей дациты риолиты геохимия зеленокаменный пояс Science Q Максим Александрович Гоголев Maxim Gogolev Geochemical types of subvolcanic dacite – rhyolite complexes from the сentral part of the Vedlozero-Segozero greenstone belt (Karelian Craton) |
topic_facet |
архей дациты риолиты геохимия зеленокаменный пояс Science Q |
description |
The paper presents the results of detailed geological, petrographic and geochemical studies of Archean acidic subvolcanic rocks from the Koikary domain located in the central part of the Vedlozero-Segozero greenstone belt. Three petrologically contrasting groups are clearly distinguished in the investigated dacite-rhyolite association: 1) dacite with high content of Cr, Ni, Ti, Nb, and heavy REE, which are characterized by εNd (2935 Ma) from +0.72 to +2.93 and contain porphyritic phenocrysts of several generations; 2) rhyolite with a strongly fractionated REE distribution, negative anomalies in Nb, Sr and Ti, and with εNd (2935 Ma) from +1.15 to +3.37; 3) dacite and rhyolite with a moderately fractionated REE distribution, negative anomalies in Nb, Sr and Ti, and with εNd (2935 Ma) = –6.47. The above mentioned features of the rocks reflect the contrasting conditions of generation of acidic subvolcanic rocks in the Koikary domain and mark different time stages of the greenstone belt development. |
format |
Article in Journal/Newspaper |
author |
Максим Александрович Гоголев Maxim Gogolev |
author_facet |
Максим Александрович Гоголев Maxim Gogolev |
author_sort |
Максим Александрович Гоголев |
title |
Geochemical types of subvolcanic dacite – rhyolite complexes from the сentral part of the Vedlozero-Segozero greenstone belt (Karelian Craton) |
title_short |
Geochemical types of subvolcanic dacite – rhyolite complexes from the сentral part of the Vedlozero-Segozero greenstone belt (Karelian Craton) |
title_full |
Geochemical types of subvolcanic dacite – rhyolite complexes from the сentral part of the Vedlozero-Segozero greenstone belt (Karelian Craton) |
title_fullStr |
Geochemical types of subvolcanic dacite – rhyolite complexes from the сentral part of the Vedlozero-Segozero greenstone belt (Karelian Craton) |
title_full_unstemmed |
Geochemical types of subvolcanic dacite – rhyolite complexes from the сentral part of the Vedlozero-Segozero greenstone belt (Karelian Craton) |
title_sort |
geochemical types of subvolcanic dacite – rhyolite complexes from the сentral part of the vedlozero-segozero greenstone belt (karelian craton) |
publisher |
Karelian Research Centre of the Russian Academy of Sciences |
publishDate |
2018 |
url |
https://doi.org/10.17076/geo757 https://doaj.org/article/06dda8a5d0024a6a8f699eb3cbcf6132 |
genre |
karelian |
genre_facet |
karelian |
op_source |
Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Vol 0, Iss 11 (2018) |
op_relation |
http://journals.krc.karelia.ru/index.php/precambrian/article/view/757 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/geo757 https://doaj.org/article/06dda8a5d0024a6a8f699eb3cbcf6132 |
op_doi |
https://doi.org/10.17076/geo757 |
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Proceedings of the Karelian Research Centre of the Russian Academy of Sciences |
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11 |
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