2. Mesoarchean Kola-Karelia continent

Mints, Michael V.; Dokukina, Ksenia A.; Konilov, A. N.; Каулина, Т. В.; Белоусова, Е. А.; Dokukin, Peter; Natapov, Lev M.; Ван, К. В.

doi:10.1130/2015.2510(02)

Cited by 8 publications

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“…However, according to the recent view of particularly competent researchers of the TTG problem, "…any environment allowing hydrous mafic rocks to melt at high pressure would be equally suitable to form "TTG-like" magmas …" [Moyen, Martin, 2012, p. 20]. In general, following the plume model of granulite-facies metamorphism [Mints, 2014;Mints et al, 2015a], we assume that in the West Greenland Palaeo-and Mesoarchaean, the close relationship in time and space of the intracontinent-type anorthosite intrusions and granulite-facies metamorphism may be seen as evidence that both were linked with mantle plume activity, like their Neoarchaean and Proterozoic counterparts.…”

Section: Succession Of Granulite-facies Metamorphic Events In West Grmentioning

confidence: 99%

Age and isotopic geochemical characteristics of Archean carbonatites and alkaline rocks of the Baltic shield

2007

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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.Key words: Precambrian; plate-tectonics; plume-tectonics; granulite-gneiss belts; supercontinent; intracontinent oval orogenRecommended by E.V. Sklyarov Аннотация: Ка...

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Section: Succession Of Granulite-facies Metamorphic Events In West Grmentioning

confidence: 99%

Age and isotopic geochemical characteristics of Archean carbonatites and alkaline rocks of the Baltic shield

2007

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“…3.05–2.85 Ga, in some cases down to c . 2.75 Ga), which are fragments of ancient island‐arc systems accreted to the microcontinents (Mints et al ., ).…”

Section: Geological Settingmentioning

confidence: 97%

“…Thus, the rocks of the Keret Nappe represent the former active margin of the Inari–Kola microcontinent. The Khetolambina microcontinent, the eclogite‐bearing Keret Nappe and the Central Belomorian Belt form a coherent Mesoarchean to Neoarchean tectonic package, which we refer to as the Belomorian Eclogite Province (Mints et al ., ).…”

Section: Geological Settingmentioning

confidence: 97%

“…The Mesoarchean–Neoarchean Belomorian Tectonic Province (Fig. ), which represents an accretionary–collisional orogen formed at 2.88–2.76 Ga (Mints et al ., and references therein), is composed of the Khetolambina and Inari‐Kola microcontinents, the Central Belomorian Greenstone Belt and the synformal Kovdozero Thrust Nappe. The Khetolambina microcontinent (a granite–greenstone terrane) mainly consists of older TTG gneisses (3.12–2.83 Ga) and small bodies and dykes of younger TTG rocks (2.83–2.79 Ga).…”

Section: Geological Settingmentioning

confidence: 99%

“…The geological structure at the present‐day surface and deep crustal structure of this province, its composition and age, and the origin of the protolith rocks, with a particular emphasis on the eclogites, have been considered in numerous publications (Volodichev et al ., ; Mints et al ., , , ; Skublov et al ., ,b, ,b; Dokukina & Konilov, ; Slabunov et al ., ; Dokukina et al ., , ,b, ; Shchipansky et al ., ,b; Volodichev et al ., ; Perchuk & Morgunova, ; Li et al ., ). Along with general conclusions, these authors have offered controversial interpretations concerning the age and nature of key geological events in the origin of the Belomorian Eclogite Province.…”

Section: Introductionmentioning

confidence: 99%

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Melting of eclogite facies sedimentary rocks in the Belomorian Eclogite Province, Russia

Dokukina

Mints

Konilov

2016

Journal Metamorphic Geology

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The eclogites exposed along northeastern boundary of the Belomorian orogen in the eastern Fennoscandian Shield were formed as a result of Mesoarchean–Neoarchean subduction and collision. As has been shown previously, the common protolith of the Salma‐type subduction‐related eclogite was oceanic layered gabbro. In this paper, we characterize eclogites formed from volcanic–sedimentary rocks of the upper oceanic crust, which comprised pillow lavas and associated aluminous sediments that filled the interpillow space intercalated with lava flows. As a result of eclogite facies metamorphism, the aluminous sediments have been transformed into coarse‐grained garnet–phengite–quartz rocks under pressure no lower than 21 kbar at a temperature of ~650 °C. Alternatively, we cannot rule out the possibility that the garnet–phengite–quartz veins represent solidified felsic melts that were produced by melting of boron‐bearing hydrothermally altered oceanic crust in the subduction zone. During transfer to the upper crust under high‐P granulite facies conditions, phengite underwent incongruent melting with formation of complex polymineralic pseudomorphs consisting of feldspar, biotite, muscovite and kyanite with corundum and dumortierite. The peak of high‐T metamorphism during exhumation of the eclogites is estimated at 850–900 °C, i.e. at least 50–100 °C higher than previous estimates.

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Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing mélange, Belomorian Province (Russia)

Zhang

Wei

et al. 2017

Precambrian Research

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2. Mesoarchean Kola-Karelia continent

Cited by 8 publications

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Age and isotopic geochemical characteristics of Archean carbonatites and alkaline rocks of the Baltic shield

Age and isotopic geochemical characteristics of Archean carbonatites and alkaline rocks of the Baltic shield

Melting of eclogite facies sedimentary rocks in the Belomorian Eclogite Province, Russia

Neoarchean-Paleoproterozoic granulite-facies metamorphism in Uzkaya Salma eclogite-bearing mélange, Belomorian Province (Russia)

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