Basic rocks of the Lapland granulite belt and compositional heterogeneity of the Early Precambrian mantle

Kozlov, N. E.; Sorokhtin, N. O.; Martynov, E. V.; Kozlova, N. E.

doi:10.1134/s001670291005006x

Cited by 4 publications

(21 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained data were based on both new and previous research and prove the suggestion [10,11] that the oldest core of the Kola protocontinent formed in the northeast of the region and accreted further west and southwestwards. These data suggest the following development model of rock association in the Kola region.…”

Section: Discussionsupporting

confidence: 80%

“…At present, despite the extensive and detailed investigation of the Archean structural and compositional complexes of the Kola GGnA, reconstructing its earlier stages is still a challenge, and datings of its generation are obscure [8][9][10]11,13,[17][18][19][20][21]. We can clearly define structural-metamorphic complexes that show the upper Archean collision of the continental crust, which is well-observed in the eastern part of the Baltic Shield.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Geodynamic Evolution and Metallogeny of Archaean Structural and Compositional Complexes in the Northwestern Russian Arctic

2018

View full text Add to dashboard Cite

This paper highlights the geodynamic evolution of the early Precambrian rock associations in the northwestern part of the Russian Arctic where the rocks are exposed in the Kola region (northeastern Baltic Shield). The evolution is shown to predetermine the metallogenic potential of the area. It is emphasized that the Earth’s evolution is a non-linear process. Thus, we cannot draw direct analogies with Phanerozoic time or purely apply the principle of actualism, which is still widely used by experts in Precambrian geology to study the premetamorphic history of ancient deposits. In both cases, the principles should be adjusted. This article provides a novel technique for reconstructing geodynamic regimes of protolith formation in the early Precambrian. The technique identifies changing trends in geodynamic regimes during the formation of the Archean structural and compositional complexes in the Kola region. These trends fit into the earlier suggested general scheme of their formation, thus enhancing its reliability. The metallogeny of the ore areas is specified. The results of the geodynamic reconstructions explain most of the location patterns of minerals within the Kola region. Thus, the authors consider the metallogenic forecast based on geodynamic reconstructions to be a promising trend for further research.

show abstract

Section: Discussionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Geodynamic Evolution and Metallogeny of Archaean Structural and Compositional Complexes in the Northwestern Russian Arctic

2018

View full text Add to dashboard Cite

show abstract

“…The LPG area is a structure made of metamorphosed sedimentary-volcanic and metaintrusive rocks (Kozlov 1990;Kozlov and Ivanov 1991;Kozlov et al 1995). This structure includes the Tannaelv-Javroziero rock belt (built of metavolcanic-intrusiverocks, metamorphosed in amphibolite facies (Barbey et al 1984(Barbey et al , 1990Kozlov 1990;Kozlov and Ivanov 1991;Kozlov and Martynov 1992;Kozlov et al 2010), the central part with rocks of the sedimentary and plutonic sequences that are metamorphosed in granulite facies (Kozlov 1990), and a belt of intrusive rocks containing xenoliths (Huber 2014a). In the Kandalaksha region, a series of meta-volcanics, mainly represented by amphibolites with garnets, and the accompanying formations of metamorphosed tufa-sedimentary rocks (amphibolite shales and amphibolite-quartz-garnet schists) were separated, forming in each area, 4 complexes of overlapping rock layers (Huber 2014a).…”

Section: Geological Structurementioning

confidence: 99%

Geoheritage of the Kandalaksha region (Kola Peninsula, White Sea, Arctic Russia), Evaluation, and Geotourism Opportunities

Huber

Galina²,

Mariya³

et al. 2022

Geoheritage

View full text Add to dashboard Cite

The subarctic Kandalaksha region abounds in many tourist values and is notably characterized by a richness of geology, nature, history, and landscape. Its mountains are located directly on the coast of the White Sea. The skerry-fiord coast is the habitat of many seabirds that nest on its many islands. There is also large mammals such as seals and bears. The coastal area and islands are a reserve within the National Park that was established to protect the breeding areas of the seabirds. Despite its location near the Arctic Circle, the area has a relatively mild climate. Many of the villages and towns in the area have a centuries-old history inextricably linked to the indigenous peoples (Karelians, Sami) who inhabited the area, as well as to the “Pomors,” the first Russian colonizers of the area. On top of this, this is a location with an environment that contains numerous examples of flora and fauna, as well as a geologically and geomorphologically interesting landscape connected with glaciation, abrasion, and isostatic movements. Here, the geological substrate, made up of Paleoproterozoic collisional structures of the Lapland Granulite Belt, was repeatedly tectonically rejuvenated within the forming aulacogen of the White Sea and the Kola-Lapland Mobile Belt, along with numerous Paleozoic intrusions of kimberlite and alkaline rocks. The youngest processes are associated with Pleistocene glaciation and isostatic relaxation in the Holocene. All these features contribute to the high tourist potential of the area. At present, it is being developed in a more or less organized way with the participation of private capital. This article presents a proposal for the systematic development of the area in question and the formalization of tourist routes in the area. This article aims to meet this need by proposing a tourist trail in the Kandalaksha area so as to enable tourists to explore this remarkable area.

show abstract

“…The revised model considers the LGB complex as intercalated nappes of the different origin, as represented by felsic and mafic granulites, which were upthrust onto the anorthosite bodies and amphibolites (Mints 1973;Bogdanova et al 1992;Bibikova et al 1993;Terekhov and Levitsky 1993;Miller and Milkevich 1995;Terekhov 2007;Cagnard et al 2011). Kozlov et al (1995aKozlov et al ( , 1995b undertook a detailed geochemical analysis of the granulites that revealed their volcano-sedimentary origin. The revised model (Kozlov 1995a;1995b) represents the LGB complex as a composite package of tectonically superimposed Precambrian supracrustal sequences exhibiting modern island-arc affinities.…”

Section: Past Studies Of the Lgb Complex Geology And Geotectonic Inte...mentioning

confidence: 99%

“…The basal mafic unit is represented by gneiss-amphibolites, which are discordantly overlain by granulites representing the upper acid unit (Figure 1) (Kozlov et al 1995a(Kozlov et al , 1995b. Their contact is marked by anorthosite bodies (Belyaev 1971;Vinogradov et al 1980;Kozlov et al 1995aKozlov et al , 1995b, which also records an isograd between amphibolite and granulite facies (Priyatkina and Sharkov 1979). The authors would like to emphasise that the geological map shown in Figure 1 is schematic.…”

Section: Regional Geological Contextmentioning

confidence: 99%

Lapland Granulite Belt–Neoarchean subduction zone in the North-Eastern Baltic shield

Kozlov

Martynov

Sorokhtin

2021

Applied Earth Science

View full text Add to dashboard Cite

This paper represents a geological review of the Lapland Granulite Belt (LGB). Description of the general geological framework of the LGB complex is coupled with reviews of the geochronological data, metamorphism, mineral endowment and concludes with a discussion of the geotectonic models. It is shown that the belt was formed in the Neoarchean (2703 ± 9 Ma using the U-Pb method) and consists of two compositionally different units. The lower member with dominating amphibolites is interpreted as metamorphosed volcanics, while the upper member is mainly composed of metamorphosed sandstones. It is noted that the composition and structure of the LGB complex are broadly consistent with typical Phanerozoic island-arc complexes. An interpretation of the LGB complex as a Neoarchean island-arc system is proposed. It is consistent with existing geodynamic interpretations of the adjacent terrains and, in general, fits the global geodynamic model of the supracrustal Archean complexes in the Baltic Shield.

show abstract

Basic rocks of the Lapland granulite belt and compositional heterogeneity of the Early Precambrian mantle

Cited by 4 publications

References 0 publications

Geodynamic Evolution and Metallogeny of Archaean Structural and Compositional Complexes in the Northwestern Russian Arctic

Geodynamic Evolution and Metallogeny of Archaean Structural and Compositional Complexes in the Northwestern Russian Arctic

Geoheritage of the Kandalaksha region (Kola Peninsula, White Sea, Arctic Russia), Evaluation, and Geotourism Opportunities

Lapland Granulite Belt–Neoarchean subduction zone in the North-Eastern Baltic shield

Contact Info

Product

Resources

About