Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia
Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia Clinopyroxenites, phoscorites and carbonatites from the Devonian Seblyavr intrusion (Kola Peninsula, Russia) have petrographic characteristics indicating that they are...
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Walter de Gruyter GmbH
2007
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crdegruyter:10.2478/v10002-007-0017-6 2023-05-15T17:04:51+02:00 Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia Balaganskaya, Elena Downes, Hilary Demaiffe, Daniel 2007 http://dx.doi.org/10.2478/v10002-007-0017-6 https://content.sciendo.com/view/journals/mipo/38/1/article-p29.xml https://content.sciendo.com/downloadpdf/journals/mipo/38/1/article-p29.xml unknown Walter de Gruyter GmbH Mineralogia volume 38, issue 1, page 29-45 ISSN 1899-8526 1899-8291 Geochemistry and Petrology journal-article 2007 crdegruyter https://doi.org/10.2478/v10002-007-0017-6 2022-04-14T05:01:14Z Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia Clinopyroxenites, phoscorites and carbonatites from the Devonian Seblyavr intrusion (Kola Peninsula, Russia) have petrographic characteristics indicating that they are accumulative in origin. Their geochemical (major and rare earth elements) compositions can be accounted for by mixtures of their major rock-forming minerals and accessory phases, i.e. they reflect the record of mineral accumulation. All of the analysed Seblyavr rocks are strongly LREE-enriched with (La/Yb) N mostly ranging from 38 to 189. However, a dolomite carbonatite with hydrothermal LREE-Sr mineralization has an extreme (La/Yb) N value of 1659. Such late-stage dolomite carbonatites were formed by hydrothermal (rather than magmatic) processes. Whole-rock samples of representative magmatic lithologies from Seblyavr have initial 87 Sr/ 86 Sr and ε Nd that fall in a very narrow range from 0.7031 to 0.7033 and +4.9 to +5.9, respectively. We therefore conclude that clinopyroxenites, phoscorites and carbonatites were formed by differentiation and crystallization of a single batch of melt. The parental melt was derived from a depleted upper mantle source that had been meta-somatised prior to melting. Article in Journal/Newspaper kola peninsula De Gruyter (via Crossref) Kola Peninsula Mineralogia 38 1 29 45 |
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Open Polar |
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De Gruyter (via Crossref) |
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crdegruyter |
language |
unknown |
topic |
Geochemistry and Petrology |
spellingShingle |
Geochemistry and Petrology Balaganskaya, Elena Downes, Hilary Demaiffe, Daniel Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia |
topic_facet |
Geochemistry and Petrology |
description |
Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia Clinopyroxenites, phoscorites and carbonatites from the Devonian Seblyavr intrusion (Kola Peninsula, Russia) have petrographic characteristics indicating that they are accumulative in origin. Their geochemical (major and rare earth elements) compositions can be accounted for by mixtures of their major rock-forming minerals and accessory phases, i.e. they reflect the record of mineral accumulation. All of the analysed Seblyavr rocks are strongly LREE-enriched with (La/Yb) N mostly ranging from 38 to 189. However, a dolomite carbonatite with hydrothermal LREE-Sr mineralization has an extreme (La/Yb) N value of 1659. Such late-stage dolomite carbonatites were formed by hydrothermal (rather than magmatic) processes. Whole-rock samples of representative magmatic lithologies from Seblyavr have initial 87 Sr/ 86 Sr and ε Nd that fall in a very narrow range from 0.7031 to 0.7033 and +4.9 to +5.9, respectively. We therefore conclude that clinopyroxenites, phoscorites and carbonatites were formed by differentiation and crystallization of a single batch of melt. The parental melt was derived from a depleted upper mantle source that had been meta-somatised prior to melting. |
format |
Article in Journal/Newspaper |
author |
Balaganskaya, Elena Downes, Hilary Demaiffe, Daniel |
author_facet |
Balaganskaya, Elena Downes, Hilary Demaiffe, Daniel |
author_sort |
Balaganskaya, Elena |
title |
Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia |
title_short |
Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia |
title_full |
Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia |
title_fullStr |
Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia |
title_full_unstemmed |
Ree and Sr-Nd Isotope Compositions of Clinopyroxenites, Phoscorites and Carbonatites of the Seblyavr Massif, Kola Peninsula, Russia |
title_sort |
ree and sr-nd isotope compositions of clinopyroxenites, phoscorites and carbonatites of the seblyavr massif, kola peninsula, russia |
publisher |
Walter de Gruyter GmbH |
publishDate |
2007 |
url |
http://dx.doi.org/10.2478/v10002-007-0017-6 https://content.sciendo.com/view/journals/mipo/38/1/article-p29.xml https://content.sciendo.com/downloadpdf/journals/mipo/38/1/article-p29.xml |
geographic |
Kola Peninsula |
geographic_facet |
Kola Peninsula |
genre |
kola peninsula |
genre_facet |
kola peninsula |
op_source |
Mineralogia volume 38, issue 1, page 29-45 ISSN 1899-8526 1899-8291 |
op_doi |
https://doi.org/10.2478/v10002-007-0017-6 |
container_title |
Mineralogia |
container_volume |
38 |
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1 |
container_start_page |
29 |
op_container_end_page |
45 |
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1766059217269030912 |