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6. Middle Paleoproterozoic Bryansk-Kursk-Voronezh intracontinental collisional orogen

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Michael V. Mints
Michael V. Mints
Geological Institute, Russian Academy of Sciences (RAS), 7 Pyzhevsky Lane, Moscow, 119017, Russia
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Irina B. Philippova
Irina B. Philippova
Geological Institute, Russian Academy of Sciences (RAS), 7 Pyzhevsky Lane, Moscow, 119017, Russia
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Pavel S. Babayants
Pavel S. Babayants
Aerogeophysica Inc., 38/A b.15, 2-nd Khutorskaya Str., Off. 201, Moscow, 127287, Russia
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Yury I. Blokh
Yury I. Blokh
Aerogeophysica Inc., 38/A b.15, 2-nd Khutorskaya Str., Off. 201, Moscow, 127287, Russia
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Alexey A. Trusov
Alexey A. Trusov
Aerogeophysica Inc., 38/A b.15, 2-nd Khutorskaya Str., Off. 201, Moscow, 127287, Russia
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Published:
May 01, 2015

The Bryansk-Kursk-Voronezh intracontinental collisional orogen was formed by the juvenile Middle Paleoproterozoic assemblages in combination with Early Paleoproterozoic complexes and areas of reworked Archean crust. The crucial events fall in the time interval 2.1–2.0 Ga. The orogen includes a sequence of second-order, near-meridional orogens, which, in turn, consist of tectonic belts. From the west eastward, these are the Krivoi Rog–Bryansk orogen, the orogen of the Kursk magnetic anomaly (KMA), and the East Voronezh orogen. The latter may be regarded as an axial (central) structural element, which marks a transient rupture of the continental crust. The north to south extent of the orogen along the strike of the second-order orogens reaches 900 km long and ca. 900 km in width. The Krivoi Rog–Bryansk orogen consists of two groups of tectonic belts. Its western region is composed of tectonic nappes pertaining to the Kulazhino gneiss and the Bryansk granulite-gneiss belts. The eastern region, including the Krupetsk-Znamensk belt and the Meshchevsk system of tectonic sheets, with significant role of intensely deformed banded iron formations (BIF) of the Kursk and Oskol groups, is also the western imbricated margin of the Archean Kursk craton. The volcanic-sedimentary BIF belts play the main role in the structure of the KMA orogen. The second important component is composed of subvolcanic and plutonic mafic-ultramafic, felsic, and alkaline rock complexes. Granite-gneiss domes are related to the final stage of the orogen evolution. The East Voronezh orogen consists of the Lipetsk-Losevka volcanic-plutonic belt and the Vorontsovka imbricated thrust belt, separated by the Losevka-Mamon suture. The evolution of the Bryansk-Kursk-Voronezh orogen as a whole includes: onset of rifting within the Archean Kursk craton (2.59–2.53 Ga); terrigenous and chemical sedimentation including BIF and volcanic activity (2.5–2.10 Ga), periodically accompanied by emplacement of intrusions (2.6–2.5 Ga and 2.1–2.05 Ga); metamorphism under granulite-facies conditions in the Kulazhino and Bryansk belts at 2.13 Ga and in the Vorontsovka belt at 2.10 Ga; intrusive magmatism in the Vorontsovka belt generally synchronous with high-temperature metamorphism; suprasubduction magmatism and formation of the Lipetsk-Losevka volcanic-plutonic belt 2.10–2.05 Ga ago; the collision-related reverse and thrust faulting and folding in the BIF belts accompanied by westward and south-westward overturning; rheomorphism and formation of granite-gneiss and granite-migmatite domes deforming the fold-nappe assemblages in the BIF belts of KMA; and the tectonothermal activity of postcollisional and anorogenic stages (2.07–1.9 Ga) expressed by emplacement of alkaline ultramafic and gabbro-syenite intrusions in the Lipetsk-Losevka belt and its hinterland. The most active phase of tectonic evolution spanned the time interval 2.1–2.0 Ga, which was no less than 100 Ma long and coincided with the active stage of extension, sedimentation, and high-temperature metamorphism in the northern part of the East European craton.

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GSA Special Papers

East European Craton: Early Precambrian History and 3D Models of Deep Crustal Structure

Michael V. Mints
Michael V. Mints
Geological Institute, Russian Academy of Sciences (RAS), 7 Pyzhevsky Lane, Moscow, 119017, Russia
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Ksenia A. Dokukina
Ksenia A. Dokukina
Geological Institute, Russian Academy of Sciences (RAS), 7 Pyzhevsky Lane, Moscow, 119017, Russia, and Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow, 119991, Russia
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Alexander N. Konilov
Alexander N. Konilov
Geological Institute, Russian Academy of Sciences (RAS), 7 Pyzhevsky Lane, Moscow, 119017, Russia, and Institute of Experimental Mineralogy, Russian Academy of Sciences (RAS), Chernogolovka, Moscow Region, 142432, Russia
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Irina B. Philippova
Irina B. Philippova
Geological Institute, Russian Academy of Sciences (RAS), 7 Pyzhevsky Lane, Moscow, 119017, Russia
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Valery L. Zlobin
Valery L. Zlobin
Geological Institute, Russian Academy of Sciences (RAS), 7 Pyzhevsky Lane, Moscow, 119017, Russia
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Pavel S. Babayants
Pavel S. Babayants
Aerogeophysica Inc., 38/A b.15, 2-nd Khutorskaya Str., Off. 201, Moscow, 127287, Russia
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Elena A. Belousova
Elena A. Belousova
GEMOC ARC National Key Centre, Department of Earth and Planetary Sciences, Macquarie University, Sydney, NSW 2109, Australia
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Yury I. Blokh
Yury I. Blokh
Aerogeophysica Inc., 38/A b.15, 2-nd Khutorskaya Str., Off. 201, Moscow, 127287, Russia
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Maria M. Bogina
Maria M. Bogina
Institute of Ore Geology, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences (RAS), 35 Staromonetny Lane, Moscow, 119017, Russia
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William A. Bush
William A. Bush
Aerogeophysica Inc., 38/A b.15, 2-nd Khutorskaya Str., Off. 201, Moscow, 127287, Russia
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Peter A. Dokukin
Peter A. Dokukin
Peoples' Friendship University of Russia, 6 Miklukho-Maklaya Str., Moscow, 117198, Russia
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Tatiana V. Kaulina
Tatiana V. Kaulina
Geological Institute, Kola Science Centre RAS, 14 Fersman Str., Apatity, Murmansk Region, 184209, Russia
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Lev M. Natapov
Lev M. Natapov
GEMOC ARC National Key Centre, Department of Earth and Planetary Sciences, Macquarie University, Sydney, NSW 2109, Australia
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Valentina B. Piip
Valentina B. Piip
Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow, 119991, Russia
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Vladimir M. Stupak
Vladimir M. Stupak
Branch of the Open Stock Company ?All-Russian Scientific and Research Institute of Geophysical Exploration???Spetsgeofizika,? Settlement Povarovo, 12 Povarovka, Moscow Region, 141540, Russia
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Arsen K. Suleimanov
Arsen K. Suleimanov
Branch of the Open Stock Company ?All-Russian Scientific and Research Institute of Geophysical Exploration???Spetsgeofizika,? Settlement Povarovo, 12 Povarovka, Moscow Region, 141540, Russia
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Alexey A. Trusov
Alexey A. Trusov
Aerogeophysica Inc., 38/A b.15, 2-nd Khutorskaya Str., Off. 201, Moscow, 127287, Russia
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Konstantin V. Van
Konstantin V. Van
Institute of Experimental Mineralogy, Russian Academy of Sciences (RAS), Chernogolovka, Moscow Region, 142432, Russia
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Nadezhda G. Zamozhniaya
Nadezhda G. Zamozhniaya
Branch of the Open Stock Company ?All-Russian Scientific and Research Institute of Geophysical Exploration???Spetsgeofizika,? Settlement Povarovo, 12 Povarovka, Moscow Region, 141540, Russia
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Geological Society of America
Volume
510
ISBN print:
9780813725109
Publication date:
May 01, 2015

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