Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region
The Sallanlatva massif belongs to the group of Paleozoic alkaline-ultrabasic complexes wide spread in the Kola Region (the northwestern part of the Fennoscandian Shield). In the central part of this massif, the host ijolite and urtites contain calcite, ankerite, ankerite-dolomite and siderite carbon...
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Murmansk State Technical University
2021
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Online Access: | https://doi.org/10.21443/1560-9278-2021-24-1-57-68 https://doaj.org/article/933cf8b651764654860fd92d93b7c853 |
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ftdoajarticles:oai:doaj.org/article:933cf8b651764654860fd92d93b7c853 2023-05-15T16:13:03+02:00 Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region Sidorov M. Yu. Kozlov E. N. Fomina E. N. 2021-03-01T00:00:00Z https://doi.org/10.21443/1560-9278-2021-24-1-57-68 https://doaj.org/article/933cf8b651764654860fd92d93b7c853 RU rus Murmansk State Technical University http://vestnik.mstu.edu.ru/show-eng.shtml?art=2088 https://doaj.org/toc/1560-9278 https://doi.org/10.21443/1560-9278-2021-24-1-57-68 1560-9278 https://doaj.org/article/933cf8b651764654860fd92d93b7c853 Vestnik MGTU, Vol 24, Iss 1, Pp 57-68 (2021) explosive breccias carbonatites sallanlatva late magmatic processes carbonatite melt эксплозивные брекчии карбонатиты массив салланлатва позднемагматические процессы карбонатитовый расплав General Works A article 2021 ftdoajarticles https://doi.org/10.21443/1560-9278-2021-24-1-57-68 2022-12-31T12:55:24Z The Sallanlatva massif belongs to the group of Paleozoic alkaline-ultrabasic complexes wide spread in the Kola Region (the northwestern part of the Fennoscandian Shield). In the central part of this massif, the host ijolite and urtites contain calcite, ankerite, ankerite-dolomite and siderite carbonatites. The explosive processes that led to the formation of carbonatite breccias in the calcite and ankerite-dolomite carbonatites occurred in Sallanlatva massife in the last stages of the carbonatite magmatism. There are two types of explosive carbonatite breccias in the Sallanlatva massif: (1) glimmerite-calciocarbonatite breccias, and (2) siderite-dolomite breccias. Analysis of the mineral composition of fragments and matrix and the shape of fragments in breccias has shown that the first material to intrude into the host calcite and ankerite-dolomite carbonatites was calcite melt. After that, dolomite melt penetrated through the fracture zones, which resulted in the formation of siderite-dolomite breccias. The differences in the mineral composition of the breccia matrix suggest that the residual carbonatite melts originate from separate magma chambers. The chamber with calcite melt was located at great depth, and some captured glimmerite fragments were abraded during the melt upwelling. Silicate-dolomite melts lifted from a shallower depth; the captured fragments of siderite carbonatites retained their angular shape. Late hydrothermal processes yielded veins and caverns with Ba-Sr-P-S-Ti-REE mineralization in the breccias and host rocks. Article in Journal/Newspaper Fennoscandian Directory of Open Access Journals: DOAJ Articles Vestnik MGTU 24 1 57 68 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
explosive breccias carbonatites sallanlatva late magmatic processes carbonatite melt эксплозивные брекчии карбонатиты массив салланлатва позднемагматические процессы карбонатитовый расплав General Works A |
spellingShingle |
explosive breccias carbonatites sallanlatva late magmatic processes carbonatite melt эксплозивные брекчии карбонатиты массив салланлатва позднемагматические процессы карбонатитовый расплав General Works A Sidorov M. Yu. Kozlov E. N. Fomina E. N. Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region |
topic_facet |
explosive breccias carbonatites sallanlatva late magmatic processes carbonatite melt эксплозивные брекчии карбонатиты массив салланлатва позднемагматические процессы карбонатитовый расплав General Works A |
description |
The Sallanlatva massif belongs to the group of Paleozoic alkaline-ultrabasic complexes wide spread in the Kola Region (the northwestern part of the Fennoscandian Shield). In the central part of this massif, the host ijolite and urtites contain calcite, ankerite, ankerite-dolomite and siderite carbonatites. The explosive processes that led to the formation of carbonatite breccias in the calcite and ankerite-dolomite carbonatites occurred in Sallanlatva massife in the last stages of the carbonatite magmatism. There are two types of explosive carbonatite breccias in the Sallanlatva massif: (1) glimmerite-calciocarbonatite breccias, and (2) siderite-dolomite breccias. Analysis of the mineral composition of fragments and matrix and the shape of fragments in breccias has shown that the first material to intrude into the host calcite and ankerite-dolomite carbonatites was calcite melt. After that, dolomite melt penetrated through the fracture zones, which resulted in the formation of siderite-dolomite breccias. The differences in the mineral composition of the breccia matrix suggest that the residual carbonatite melts originate from separate magma chambers. The chamber with calcite melt was located at great depth, and some captured glimmerite fragments were abraded during the melt upwelling. Silicate-dolomite melts lifted from a shallower depth; the captured fragments of siderite carbonatites retained their angular shape. Late hydrothermal processes yielded veins and caverns with Ba-Sr-P-S-Ti-REE mineralization in the breccias and host rocks. |
format |
Article in Journal/Newspaper |
author |
Sidorov M. Yu. Kozlov E. N. Fomina E. N. |
author_facet |
Sidorov M. Yu. Kozlov E. N. Fomina E. N. |
author_sort |
Sidorov M. Yu. |
title |
Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region |
title_short |
Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region |
title_full |
Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region |
title_fullStr |
Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region |
title_full_unstemmed |
Geology, petrography and mineralogy of explosive breccias of Sallanlatva, Kola Region |
title_sort |
geology, petrography and mineralogy of explosive breccias of sallanlatva, kola region |
publisher |
Murmansk State Technical University |
publishDate |
2021 |
url |
https://doi.org/10.21443/1560-9278-2021-24-1-57-68 https://doaj.org/article/933cf8b651764654860fd92d93b7c853 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
Vestnik MGTU, Vol 24, Iss 1, Pp 57-68 (2021) |
op_relation |
http://vestnik.mstu.edu.ru/show-eng.shtml?art=2088 https://doaj.org/toc/1560-9278 https://doi.org/10.21443/1560-9278-2021-24-1-57-68 1560-9278 https://doaj.org/article/933cf8b651764654860fd92d93b7c853 |
op_doi |
https://doi.org/10.21443/1560-9278-2021-24-1-57-68 |
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