New Promising Gold-Ore Objects in the Strelna Greenstone Belt, Kola Peninsula

Kalinin, A. A.; Kazanov, O. V.; Kudryashov, N. M.; Bakaev, G. F.; Петров, С. В.; Elizarov, D. V.; Lyalina, Ludmila

doi:10.1134/s1075701517060022

Cited by 5 publications

(9 citation statements)

References 18 publications

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“…The deposits in the zones of amphibolite metamorphism formed under conditions of ductile deformations. The foliation of mineralized rocks was reported in the Porojarvi occurrences in the Pechenga belt [14], in the Sergozerskoe deposit (Strelninsky belt) [15], and in the Kichany occurrence (Tiksheozersky belt) [16].…”

Section: Distribution Of Gold Deposits and Occurrences In The Ne Part...mentioning

confidence: 94%

Stages of Gold Deposits Formation in the Precambrian of the North-Eastern Fennoscandia

Kalinin

2022

Minerals

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Two main stages of formation of gold deposits are identified in the north-eastern part of the Fennoscandian Shield—Neoarchean (2.7–2.6 Ga) and Paleoproterozoic (1.92–1.74 Ga). These were the stages of rapid growth of the continental crust of the Earth and the consolidation of the ancient supercontinents, Kenorland in the Neoarchean, and Fennoscandia (or Columbia) in the Paleoproterozoic. Gold deposits and occurrences, which formed in the Archean (Oleninskoe and Nyalm in the Kolmozero–Voron’ya belt, and the Olenegorsk group of BIF deposits) were later metamorphosed in the Paleoproterozoic, and isotope data for the rocks and minerals of these deposits detect both Archean and Paleoproterozoic events. The Paleoproterozoic stage was the most important for the formation of gold deposits in the region, as at this stage the deposits formed not only in the Proterozoic greenstone belts, but in those Archean belts as well, which were involved in the Svecofennian tectonic processes in the Paleoproterozoic. As it is shown in the example of the deposits in the Central Lapland Paleoproterozoic belt, gold mineralization formed with a series of impulses of hydrothermal activity, and these impulses correlate with the formation of different generations of minor granite intrusions and dykes.

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Section: Distribution Of Gold Deposits and Occurrences In The Ne Part...mentioning

confidence: 94%

Stages of Gold Deposits Formation in the Precambrian of the North-Eastern Fennoscandia

Kalinin

2022

Minerals

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“…The rocks are greenschist-lower amphibolite metamorphosed (Table 6). Supracrustal rocks are intruded with dykes and minor intrusions www.videleaf.com of diorite porphyry (1875 ± 2 Ma, U-Pb, zircon [26]) and granite (~1.83 Ga?). All volcanic-sedimentary rocks in the deposit and diorite porphyry in the dykes are schistose, foliated, cut by hydrothermal veinlets, in some parts brecciated and altered.…”

Section: Gold Deposits and Occurrences In The Strel'na Greenstone Beltmentioning

confidence: 99%

“…Mineralization in the Sergozero deposit formed in the Paleoproterozoic: age of diorite porphyry dyke, which is the youngest gold-bearing rock, is 1875 ± 2 Ma (U-Pb, zircon) [26]. Age of alteration processes, estimated with the Rb-Sr method for calcite-biotite metasomatic rocks is 1739 ± 86 Ma [26]. Thus, gold mineralization was superimposed on the Neoarchean amphibolites during the Paleoproterozoic tectonic events.…”

Section: Gold Deposits and Occurrences In The Strel'na Greenstone Beltmentioning

confidence: 99%

Gold Prospects in the Western Segment of the Russian Arctic: Regional Metallogeny and Distribution of Mineralization

Kalinin¹,

Kazanov²,

Bezrukov³

et al. 2020

Minerals: Technology and Advances

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“…The rocks are greenschist-lower amphibolite metamorphosed (Table 6). Supracrustal rocks are intruded with dykes and minor intrusions of diorite porphyry (1875 ± 2 Ma, U-Pb, zircon [26]) and granite (~1.83 Ga?). All volcanic-sedimentary rocks in the deposit and diorite porphyry in the dykes are schistose, foliated, cut by hydrothermal veinlets, in some parts brecciated and altered.…”

Section: Gold Deposits and Occurrences In The Strel'na Greenstone Beltmentioning

confidence: 99%

“…Thus, gold mineralization was superimposed on the Neoarchean amphibolites during the Paleoproterozoic tectonic events. Mineralization in the Sergozero deposit formed in the Paleoproterozoic: age of diorite porphyry dyke, which is the youngest gold-bearing rock, is 1875 ± 2 Ma (U-Pb, zircon) [26]. Age of alteration processes, estimated with the Rb-Sr method for calcite-biotite metasomatic rocks is 1739 ± 86 Ma [26].…”

Section: Gold Deposits and Occurrences In The Strel'na Greenstone Beltmentioning

confidence: 99%

Gold Prospects in the Western Segment of the Russian Arctic: Regional Metallogeny and Distribution of Mineralization

et al. 2019

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Location of the deposits and occurrences of gold mineralization in metamorphic complexes of the Kola region is controlled by tectonic zones at the regional scale at the boundaries of major segments of the Fennoscandian Shield. Three zones are the most important: (1) the system of Neoarchean greenstone belts Kolmozero–Voron’ya–Ura-guba along the southern boundary of the Murmansk craton; (2) the suture, delineating the core of the Lapland–Kola orogeny in the north; and (3) the series of overthrusts and faults at the eastern flank of the Salla–Kuolajarvi belt. Gold deposits and occurrences are located within greenstone belts of Neoarchean and Paleoproterozoic age, and hosted by rocks of different primary compositions (mafic metavolcanics, diorite porphyry, and metasedimentary terrigenous rocks). The grade of metamorphism varies from greenschist to upper amphibolite facies, but the mineralized rocks are mainly lower amphibolite metamorphosed, close to the transition from greenschist to amphibolite facies. Gold deposits and occurrences in the northeastern part of the Fennoscandian Shield formed during two periods: the Neoarchean 2.7–2.6 Ga and the Paleoproterozoic 1.9–1.7 Ga. According to paleo-geodynamic reconstructions, these were the periods of collisional and accretionary orogeny in the region. Those Archean greenstone belts, which were reworked in the Paleoproterozoic (e.g., Strel’na and Tiksheozero belts), can contain gold deposits of Paleoproterozoic age.

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New Promising Gold-Ore Objects in the Strelna Greenstone Belt, Kola Peninsula

Cited by 5 publications

References 18 publications

Stages of Gold Deposits Formation in the Precambrian of the North-Eastern Fennoscandia

Stages of Gold Deposits Formation in the Precambrian of the North-Eastern Fennoscandia

Gold Prospects in the Western Segment of the Russian Arctic: Regional Metallogeny and Distribution of Mineralization

Gold Prospects in the Western Segment of the Russian Arctic: Regional Metallogeny and Distribution of Mineralization

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