The Meso-Neoarchaean Belomorian eclogite province: Tectonic position and geodynamic evolution

Mints, Michael V.; Dokukina, Ksenia A.; Konilov, A. N.

doi:10.1016/j.gr.2012.11.010

Cited by 73 publications

(61 citation statements)

References 134 publications

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“…2.82–2.70 Ga, although two zircon overgrowths with ages of c . 1.9 Ga have also been reported in these studies (Dokukina et al., ; Li et al., ; Mints et al., ), and an age of c . 1.9 Ga for the metamorphism has been proposed by Skublov, Astaf'ev, et al.…”

Section: Introductionsupporting

confidence: 71%

“…The Belomorian Province records several magmatic events ranging from Neoarchean to Paleoproterozoic in age and the rocks record polyphase deformation. Thermal pulses are attributed to the rise of mantle plumes within the underlying mantle at 2.72–2.70, 2.5–2.4 and 2.1–1.9 Ga (Dokukina et al., ; Mints et al., ; Skublov, Astaf'ev, et al., ; Skublov, Berezin et al, ; Stepanova et al., ).…”

Section: Geological Settingmentioning

confidence: 99%

“…Since an Archean age (2.87–2.72 Ga) was ascribed to eclogites of the Belomorian Province (Mints et al., ; Volodichev, Slabunov, Bibikova, Konilov, & Kuzenko, ), the so‐called “oldest eclogite” has attracted much attention. Recently, two major eclogite types have been recognized in the Belomorian Province in the southwestern foreland of the Paleoproterozoic Lapland–Kola collisional orogeny (Figure a,b), the Salma and Gridino types (Balagansky et al, ; Dokukina et al., ; Li, Zhang, Wei & Slabunov, ; Liu et al., ; Mints, Dokukina, & Konilov, ; Mints et al., ; Perchuk & Morgunova, ). Compared with the Salma‐type eclogites, those in the Gridino area are more abundant and less retrogressed (Mints et al., ).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, two major eclogite types have been recognized in the Belomorian Province in the southwestern foreland of the Paleoproterozoic Lapland–Kola collisional orogeny (Figure a,b), the Salma and Gridino types (Balagansky et al, ; Dokukina et al., ; Li, Zhang, Wei & Slabunov, ; Liu et al., ; Mints, Dokukina, & Konilov, ; Mints et al., ; Perchuk & Morgunova, ). Compared with the Salma‐type eclogites, those in the Gridino area are more abundant and less retrogressed (Mints et al., ). A minimum age of 2.87 Ga has been argued for the Salma eclogite based on the age of a crosscutting felsic vein (Mints et al., ).…”

Section: Introductionmentioning

confidence: 99%

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Age and P–T conditions of the Gridino‐type eclogite in the Belomorian Province, Russia

Zhang

Wei

et al. 2017

Journal Metamorphic Geology

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Although eclogites in the Belomorian Province have been regarded as Archean in age and among the oldest in the world, there are also multiple studies that have proposed a Paleoproterozoic age. Here, we present new data for the Gridino‐type eclogites, which occur as boudins and metamorphosed dykes within tonalite–trondhjemite–granodiorite gneisses. Zircon from these eclogites has core and rim structures. The cores display high Th/U ratios (0.18–0.45), negative Eu anomalies and strong enrichment in HREE, and have Neoarchean U–Pb ages of c. 2.70 Ga; they are interpreted to be magmatic in origin. Zircon cores have δ18O of 5.64–6.07‰ suggesting the possibility of crystallization from evolved mantle‐derived magmas. In contrast, the rims, which include the eclogite facies minerals omphacite and garnet, are characterized by low Th/U ratios (<0.035) and flat HREE patterns, and yield U–Pb ages of c. 1.90 Ga; they are interpreted to be metamorphic in origin. Zircon rims have elevated δ18O of 6.23–6.80‰, which was acquired during eclogite facies metamorphism. Based on petrography and phase equilibria modelling, we recognize a prograde epidote amphibolite facies mineral assemblage, the peak eclogite facies mineral assemblage and a retrograde high‐P amphibolite facies mineral assemblage. The peak metamorphic conditions of 695–755°C at >18 kbar for the Gridino‐type eclogites suggest an apparent thermal gradient of <39–42°C/kbar for the Lapland–Kola collisional orogeny.

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Section: Introductionsupporting

confidence: 71%

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Age and P–T conditions of the Gridino‐type eclogite in the Belomorian Province, Russia

Zhang

Wei

et al. 2017

Journal Metamorphic Geology

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“…Notably, the Shenkursk, Volga-Ural, and Sysol cratons, as well as the Pesha, and Bashkir median massifs, have not been previously distinguished. The interpretation of the aeromagnetic data and the gravity and seismic data indicates that the ADP occurs within the southern part of the Kola Craton (or Kola Continent, after [15]), which is covered by platform sediments with no exposed basement crystalline rocks.…”

Section: Geophysical Datamentioning

confidence: 99%

Diamond Exploration Potential of the Northern East European Platform

Shchukina

Shchukin²

2018

Minerals

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Abstract:In this study, we assess the diamond exploration potential of the northern East European Platform based on aeromagnetic survey results and the morphologic and geochemical analysis of 1513 grains of kimberlite indicator minerals (KIMs), such as purple pyrope garnet, olivine, and Cr-diopside. These minerals were recovered from samples collected from modern river and stream sediments in four areas located in the north-eastern (within the Arkhangelsk Diamondiferous Province) and south-western (hundreds of kilometers outside of the Arkhangelsk Diamondiferous Province) parts of the Arkhangelsk region in the European part of Russia. All the studied areas are located within ancient cratons, including the Kola, Karelian, and Shenkursk cratons. Based on the major element compositions of the KIMs and thermobarometric calculations, this study confirms that the lithospheric mantle beneath the studied areas is suitable for the formation and preservation of diamonds. The high percentage of KIMs with primary magmatic grain surface morphologies is evidence of the presence of local kimberlite sources within all of the studied areas. The significant amount of diamond-associated KIMs indicates that the potential sources are diamondiferous. Hence, the results suggest that the studied areas can be recommended for further diamond prospecting activity with a high probability of discovering new diamondiferous kimberlites.

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Introduction

2022

Formation and Crust-Mantle Geodynamic Processes of the Neoarchean K-Rich Granitoid Belt in the Southern Range of Eastern Hebei-

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The Meso-Neoarchaean Belomorian eclogite province: Tectonic position and geodynamic evolution

Cited by 73 publications

References 134 publications

Age and P–T conditions of the Gridino‐type eclogite in the Belomorian Province, Russia

Age and P–T conditions of the Gridino‐type eclogite in the Belomorian Province, Russia

Diamond Exploration Potential of the Northern East European Platform

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