The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin
Eastern part of the Central Taimyr belt is composed of Precambrian rocks penetrated by granites of the Snezhnaya complex (845–825 million years) and later overlain by mid‐Neoproterozoic sin‐ postorogenic sedimentary deposits of the Stanovaya‐Kolosova Group. Two competing concepts on the Precambrian...
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Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust
2019
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ftdoajarticles:oai:doaj.org/article:d7977839509a411ebbb3233733091b78 2023-05-15T18:31:14+02:00 The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin A. B. Kuzmichev M. K. Danukalova V. F. Proskurnin A. A. Bagaeva N. I. Beresyuk P. A. Gromov 2019-12-01T00:00:00Z https://doi.org/10.5800/GT-2019-10-4-0445 https://doaj.org/article/d7977839509a411ebbb3233733091b78 EN RU eng rus Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust https://www.gt-crust.ru/jour/article/view/934 https://doaj.org/toc/2078-502X 2078-502X doi:10.5800/GT-2019-10-4-0445 https://doaj.org/article/d7977839509a411ebbb3233733091b78 Геодинамика и тектонофизика, Vol 10, Iss 4, Pp 841-861 (2019) precambrian taimyr neoproterozoic collisional granite geochronology siberia paleocontinent Science Q article 2019 ftdoajarticles https://doi.org/10.5800/GT-2019-10-4-0445 2022-12-30T21:41:08Z Eastern part of the Central Taimyr belt is composed of Precambrian rocks penetrated by granites of the Snezhnaya complex (845–825 million years) and later overlain by mid‐Neoproterozoic sin‐ postorogenic sedimentary deposits of the Stanovaya‐Kolosova Group. Two competing concepts on the Precambrian history of the belt are dis‐ cussed. The first suggests that by the middle of the Neoproterozoic amalgamation of various terrains formed the Cen‐ tral Taimyr microcontinent, which afterwards collided with Siberia in Vendian. 2) According to the second point of view, which is shared by the authors of this article, the belt was part of the Siberian craton from at least the Mesopro‐ terozoic, and there is no suture that would separate it from the South Taimyr belt. To our surprise, during the field work in the South‐Eastern part of the Central Taimyr belt near the proposed “Vendian sutura”, assumed by the first concept, we found a granite pluton (Pregradnaya massif) intruding clastic rocks of Stanovaya‐Kolosova Group. Such setting is quite uncommon for the belt and contradicted to publications, describing the mentioned clastic rocks to overlay the granites and contain their debris. Dating of the pluton confirmed the field observations – its SRIMP zircon age has proved to be 609±2 Ma, an unusually young for this region. The pluton is located in a wide deformation zone separating the Precambrian rocks (to the northwest) and the Paleozoic deposits (to the southeast). Two minor bodies of similar porphyritic granite were found in the same zone further to the southwest, and it seemed logical to assume that a chain of Vendian granites marks boundary deformation zone. However, their dating (843±6 и 840±5 Ma) showed that they belong to Snezhnaya complex. In this paper, we discuss two Neoproterozoic magmatic ‘flare‐ups’ in the Central Taimyr Belt, which are dated at 845–825 and 640–610 Ma. Both ‘flare‐ups’ are evidenced by K‐rich per‐ aluminous granite batholiths intruded the upper crust. It is most probable that each flare‐up was ... Article in Journal/Newspaper Taimyr Siberia Directory of Open Access Journals: DOAJ Articles Kolosova ENVELOPE(50.267,50.267,-66.467,-66.467) Pregradnaya ENVELOPE(107.171,107.171,76.513,76.513) Geodynamics & Tectonophysics 10 4 841 861 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
precambrian taimyr neoproterozoic collisional granite geochronology siberia paleocontinent Science Q |
spellingShingle |
precambrian taimyr neoproterozoic collisional granite geochronology siberia paleocontinent Science Q A. B. Kuzmichev M. K. Danukalova V. F. Proskurnin A. A. Bagaeva N. I. Beresyuk P. A. Gromov The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin |
topic_facet |
precambrian taimyr neoproterozoic collisional granite geochronology siberia paleocontinent Science Q |
description |
Eastern part of the Central Taimyr belt is composed of Precambrian rocks penetrated by granites of the Snezhnaya complex (845–825 million years) and later overlain by mid‐Neoproterozoic sin‐ postorogenic sedimentary deposits of the Stanovaya‐Kolosova Group. Two competing concepts on the Precambrian history of the belt are dis‐ cussed. The first suggests that by the middle of the Neoproterozoic amalgamation of various terrains formed the Cen‐ tral Taimyr microcontinent, which afterwards collided with Siberia in Vendian. 2) According to the second point of view, which is shared by the authors of this article, the belt was part of the Siberian craton from at least the Mesopro‐ terozoic, and there is no suture that would separate it from the South Taimyr belt. To our surprise, during the field work in the South‐Eastern part of the Central Taimyr belt near the proposed “Vendian sutura”, assumed by the first concept, we found a granite pluton (Pregradnaya massif) intruding clastic rocks of Stanovaya‐Kolosova Group. Such setting is quite uncommon for the belt and contradicted to publications, describing the mentioned clastic rocks to overlay the granites and contain their debris. Dating of the pluton confirmed the field observations – its SRIMP zircon age has proved to be 609±2 Ma, an unusually young for this region. The pluton is located in a wide deformation zone separating the Precambrian rocks (to the northwest) and the Paleozoic deposits (to the southeast). Two minor bodies of similar porphyritic granite were found in the same zone further to the southwest, and it seemed logical to assume that a chain of Vendian granites marks boundary deformation zone. However, their dating (843±6 и 840±5 Ma) showed that they belong to Snezhnaya complex. In this paper, we discuss two Neoproterozoic magmatic ‘flare‐ups’ in the Central Taimyr Belt, which are dated at 845–825 and 640–610 Ma. Both ‘flare‐ups’ are evidenced by K‐rich per‐ aluminous granite batholiths intruded the upper crust. It is most probable that each flare‐up was ... |
format |
Article in Journal/Newspaper |
author |
A. B. Kuzmichev M. K. Danukalova V. F. Proskurnin A. A. Bagaeva N. I. Beresyuk P. A. Gromov |
author_facet |
A. B. Kuzmichev M. K. Danukalova V. F. Proskurnin A. A. Bagaeva N. I. Beresyuk P. A. Gromov |
author_sort |
A. B. Kuzmichev |
title |
The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin |
title_short |
The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin |
title_full |
The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin |
title_fullStr |
The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin |
title_full_unstemmed |
The pre‐Vendian (640–610 ma) granite magmatism in the Central Taimyr fold belt: the final stage of the Neoproterozoic evolution of the Siberian paleocontinent active margin |
title_sort |
pre‐vendian (640–610 ma) granite magmatism in the central taimyr fold belt: the final stage of the neoproterozoic evolution of the siberian paleocontinent active margin |
publisher |
Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust |
publishDate |
2019 |
url |
https://doi.org/10.5800/GT-2019-10-4-0445 https://doaj.org/article/d7977839509a411ebbb3233733091b78 |
long_lat |
ENVELOPE(50.267,50.267,-66.467,-66.467) ENVELOPE(107.171,107.171,76.513,76.513) |
geographic |
Kolosova Pregradnaya |
geographic_facet |
Kolosova Pregradnaya |
genre |
Taimyr Siberia |
genre_facet |
Taimyr Siberia |
op_source |
Геодинамика и тектонофизика, Vol 10, Iss 4, Pp 841-861 (2019) |
op_relation |
https://www.gt-crust.ru/jour/article/view/934 https://doaj.org/toc/2078-502X 2078-502X doi:10.5800/GT-2019-10-4-0445 https://doaj.org/article/d7977839509a411ebbb3233733091b78 |
op_doi |
https://doi.org/10.5800/GT-2019-10-4-0445 |
container_title |
Geodynamics & Tectonophysics |
container_volume |
10 |
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4 |
container_start_page |
841 |
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861 |
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