A 2.44 Ga syn-tectonic mafic dyke swarm in the Kolvitsa Belt, Kola Peninsula, Russia: implications for early Palaeoproterozoic tectonics in the north-eastern Fennoscandian Shield

Balagansky, V. V.; Timmerman, Martin J.; Kozlova, N.Ye; Kislitsyn, Roman

doi:10.1016/s0301-9268(00)00115-7

Cited by 28 publications

(12 citation statements)

References 14 publications

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“…The geological complexity of the Belomorian Mobile Belt (BMB) in NW Russia has been known for several years (e.g. [4,30]). However, little data with respect to lithologies and rock ages are so far available for the White Sea region that covers large parts of the central BMB section.…”

Section: Discussionmentioning

confidence: 99%

“…Composition and age of the rock units forming the BMB can vary on a scale of sometimes a few meters (e.g. [4,30,33]); hence it is possible that a complex basement is situated beneath the cover of glacial deposits at the Solovetsky archipelago. As the geological map given by [6] is of a scale of 1:4,000,000, and the map of [7] lacks detailed information about magmatic rocks, thorough geological mapping and dating of possible other rock units of outcropping basement material at the islands may uncover a possibly complex geology.…”

Section: Discussionmentioning

confidence: 99%

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Early Proterozoic U-Pb Zircon Ages from Basement Gneiss at the Solovetsky Archipelago, White Sea, Russia

Schuth¹,

Gornyy²,

Berndt³

et al. 2012

IJG

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The central region of the Neoarchaean Belomorian Mobile Belt (BMB) is, except for the Solovetsky Archipelago, largely covered by the White Sea. A newly discovered granitic gneiss outcrop on Solovetsky Island, Russia, enables a first age determination of the archipelago and evaluation of the hitherto poorly constrained central BMB. Zircons separated from the orthogneiss were analysed with SIMS-SHRIMP and LA-ICP-MS techniques. Both techniques yield a concordant U-Pb age of ca. 2.430 Ga, coinciding with ages of granitic intrusions in the BMB ca. 50 km west of the Solovetsky Islands

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Early Proterozoic U-Pb Zircon Ages from Basement Gneiss at the Solovetsky Archipelago, White Sea, Russia

Schuth¹,

Gornyy²,

Berndt³

et al. 2012

IJG

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“…Ages of the layered peridotite-gabbronorite intrusions localized in the upper crust of the Kola Peninsula and Northern Karelia are estimated at 2.53-2.49 and 2.44-2.43 Ga. The gabbroanorthosite bodies in the lower and middle crust were formed at virtually the same time (2.51-2.43 Ga) [Balagansky et al, 2001;Mints, 2007 and references therein]. The intrusions were accompanied by intense volcanism.…”

Section: Evidence Of Initial Riftingmentioning

confidence: 99%

“…The origin of mafic rocks and the first manifestation of granulite-facies metamorphism (860-960 °C and 10.3-14.0 kbar) at the base of the Lapland-Kolvitsa granulite belt in the Kola Peninsula (Fig. 5, a) are recorded immediately after gabbroanorthosite intrusions (M0 event at 2.46-2.43 Ga) [Mints et al, 2007, and references therein;Balagansky et al, 2001;Fonarev, Konilov, 2005]. The deepest granulites are retained at the base of the crust.…”

Section: The High-grade Metamorphic Eventmentioning

confidence: 99%

Secular Changes in Relationships Between Plate-Tectonic and Mantle-Plume Engendered Processes During Precambrian Time

Mints¹,

Eriksson²

2016

Geodin. tektonofiz.

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Paradoxically, the lists of "proxies" of both plate-and plume-related settings are devoid of even a mention of the high-grade metamorphic rocks (granulite, amphibolite and high-temperature eclogite facies). However, the granulite-gneiss belts and areas which contain these rocks, have a regional distribution in both the Precambrian and the Phanerozoic records. The origin and evolution of the granulite-gneiss belts correspond to the activity of plumes expressed in vigorous heating of the continental crust; intraplate magmatism; formation of rift depressions filled with sediments, juvenile lavas, and pyroclastic flow deposits; and metamorphism of lower and middle crustal complexes under conditions of granulite and high-temperature amphibolite facies that spreads over the fill of rift depressions also. Granulite-gneiss complexes of the East European Craton form one of the main components of the large oval intracontinental tectonic terranes of regional or continental rank. Inclusion of the granulite-gneiss complexes from Eastern Europe, North and South America, Africa, India, China and Australia in discussion of the problem indicated in the title to this paper, suggests consideration of a significant change in existing views on the relations between the plate-and plume-tectonic processes in geological history, as well as in supercontinent assembly and decay. The East European and North American cratons are fragments of the long-lived supercontinent Lauroscandia. After its appearance at ~2.8 Ga, the crust of this supercontinent evolved under the influence of the sequence of powerful mantle plumes (superplumes) up to ~0.85 Ga. During this time Lauroscandia was subjected to rifting, partial breakup and the following reconstruction of the continent. The processes of plate-tectonic type (rifting with the transition to spreading and closing of the short-lived ocean with subduction) within Lauroscandia were controlled by the superplumes. Revision of the nature of the granulite-gneiss complexes has led to a fundamental new understanding of: a more important role than envisaged previously for mantle-plume processes in the juvenile additions to the continental crust, especially during the Neoarchaean-Proterozoic; the existence of the supercontinent Lauroscandia from ~2.80 to 0.85 Ga; the leading role of mantle plumes in the interaction of plate-and plume-tectonics in the Neoarchaean-Proterozoic history of Lauroscandia and perhaps of the continental crust as a whole. We propose that the evolution of the geodynamic settings of the Earth's crust origin can be represented as a spiral sequence: the interaction of mantle-plume processes and embryonic microplate tectonics during the Palaeo-Mezoarchaean (~3.8-2.8 Ga) → plume-tectonics and local plume-driven plate-tectonics (~2.80-0.55 Ga) → Phanerozoic plate tectonics along with a reduced role of mantle plumes. Recommended by E.V. SklyarovFor citation: Mints M.V., Eriksson P.G. 2016. Secular changes in relationships between plate-tectonic and mantle-plume engendered processes during Pr...

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“…Following major crustal stretching at c. 2.45 Ga (Timmerman, 1996; Balagansky et al , 2001), the orogen was at least partly peneplaned in the earliest Palaeoproterozoic (Zagorodny, 1982; Sturt et al , 1994; Bridgwater et al , 2001). Subduction of oceanic crust led to accretion of 1.96–1.91 Ga juvenile island arcs and terranes.…”

Section: Murmansk Terrane and The Lapland–kola Orogenmentioning

confidence: 99%

Apparent partial loss age spectra of Neoarchean hornblende (Murmansk Terrane, Kola Peninsula, Russia): the role of biotite inclusions revealed by ⁴⁰Ar/³⁹Ar laserprobe analysis

Jong

Wijbrans

2006

Terra Nova

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Metamorphic hornblende frequently yields spectra with progressively increasing 40 Ar/ 39 Ar age steps, often interpreted as caused by partial resetting due to thermally activated radiogenic argon loss by solid-state diffusion. Yet, in many cases rising Ca/K ratio spectra for such samples imply the presence of minor inclusions of K-contaminant minerals. To avoid parts of grains with mineral inclusions or compositional zoning we drilled tiny discs from thin sections under a petrographic microscope. Laser step-heating of drilled biotite-free hornblende discs yielded flat age and ratio spectra. In contrast, furnace step-heated hornblende separates from the same samples produced apparent loss age spectra. Moreover, biotite-free samples yielded flat spectra by laser and furnace dating. Consequently, apparent loss spectra result from degassing of included substantially younger biotite before its hornblende host during laboratory step-heating; c. 2640 Ma hornblende ages constrain the Murmansk Terrane's cooling.

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A 2.44 Ga syn-tectonic mafic dyke swarm in the Kolvitsa Belt, Kola Peninsula, Russia: implications for early Palaeoproterozoic tectonics in the north-eastern Fennoscandian Shield

Cited by 28 publications

References 14 publications

Early Proterozoic U-Pb Zircon Ages from Basement Gneiss at the Solovetsky Archipelago, White Sea, Russia

Early Proterozoic U-Pb Zircon Ages from Basement Gneiss at the Solovetsky Archipelago, White Sea, Russia

Secular Changes in Relationships Between Plate-Tectonic and Mantle-Plume Engendered Processes During Precambrian Time

Apparent partial loss age spectra of Neoarchean hornblende (Murmansk Terrane, Kola Peninsula, Russia): the role of biotite inclusions revealed by ⁴⁰Ar/³⁹Ar laserprobe analysis

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A 2.44 Ga syn-tectonic mafic dyke swarm in the Kolvitsa Belt, Kola Peninsula, Russia: implications for early Palaeoproterozoic tectonics in the north-eastern Fennoscandian Shield

Cited by 28 publications

References 14 publications

Early Proterozoic U-Pb Zircon Ages from Basement Gneiss at the Solovetsky Archipelago, White Sea, Russia

Early Proterozoic U-Pb Zircon Ages from Basement Gneiss at the Solovetsky Archipelago, White Sea, Russia

Secular Changes in Relationships Between Plate-Tectonic and Mantle-Plume Engendered Processes During Precambrian Time

Apparent partial loss age spectra of Neoarchean hornblende (Murmansk Terrane, Kola Peninsula, Russia): the role of biotite inclusions revealed by 40Ar/39Ar laserprobe analysis

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Apparent partial loss age spectra of Neoarchean hornblende (Murmansk Terrane, Kola Peninsula, Russia): the role of biotite inclusions revealed by ⁴⁰Ar/³⁹Ar laserprobe analysis