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Global implication of mesoproterozoic (~1.4Ga) magmatism within the Sette-Daban Range (Southeast Siberia)

Citation

Malyshev, SV and Ivanov, AV and Khudoley, AK and Marfin, AE and Kamenetsky, VS and Kamenetsky, MB and Lebedeva, OY, Global implication of mesoproterozoic (~1.4Ga) magmatism within the Sette-Daban Range (Southeast Siberia), Scientific Reports, 11 Article 20484. ISSN 2045-2322 (2021) [Refereed Article]


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Copyright 2021 the authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1038/s41598-021-00010-5

Abstract

Mesoproterozoic period included several global tectonic events like break-up of Nuna and formation of Rodinia. However, although Siberia is a significant piece of both supercontinents, Mesoproterozoic time is marked by quiescence of magmatic and tectonic activity in it. We report here a mafic dyke (named Gornostakh dyke) in the southeastern Siberian Craton dated at 1419 +- 32Ma by LA-ICPMS U-Pb geochronology of apatite. The dyke has tholeiitic compositions with high MgO and alkaline content, low-Ti, and arc-like trace element pattern. Due to the absence of subduction tectonics in the study area, geochemical data could be attributed to a significant contribution from metasomatically enriched subcontinental lithospheric mantle previously modified by subduction processes. That kind of composition is common for low-Ti dykes of intraplate flood basalt provinces similar to, for example, Permian-Triassic Siberian large igneous province (LIP). Paleogeographic reconstructions suggest that Siberia was connected to Laurentia and Baltica and their reconfiguration interrupts a prolonged tectonic quiescence in the Siberian Craton from ca. 1.88 Ga reflecting a transition from Nuna to Rodinia configuration. The mafic magmatism on 1419 Ma on the southeastern margin of the Siberian Craton together with coeval extensional tectonics observed in the structure of the Sette-Daban ridge proposes a hypothetical LIP which may be a direct consequence of the beginning of this transition.

Item Details

Item Type:Refereed Article
Keywords:Sette-Daban Range; Siberia; mesoproterozoic magmatism
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and metamorphic petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Kamenetsky, VS (Professor Vadim Kamenetsky)
UTAS Author:Kamenetsky, MB (Dr Maya Kamenetsky)
ID Code:152579
Year Published:2021
Deposited By:Research Performance and Analysis
Deposited On:2022-08-22
Last Modified:2022-09-20
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