Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 47161 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Evolution of magmatism in the zone of junction between granite-greenstone and granulite-gneiss regions, Sayan mountains, Siberia Evolution of magmatism in the zone of junction between granite-greenstone and granulite-gneiss regions, Sayan mountains, Siberia Levitskii V I Levitskii V I Sandimirova G P Sandimirova G P Melnikov A I Melnikov A I Vinogradov Institute of Geochemistry, Siberian Division of RAS, Irkutsk, Russia ru Vinogradov Institute of Geochemistry, Siberian Division of RAS, Irkutsk, Russia ru Vinogradov Institute of Geochemistry, Siberian Division of RAS, Irkutsk, Russia ru Vinogradov Institute of Geochemistry, Siberian Division of RAS, Irkutsk, Russia ru Institute of the Earth's Crust, Siberian Division of RAS, Irkutsk, Russia ru Institute of the Earth's Crust, Siberian Division of RAS, Irkutsk, Russia ru 3 3 197 217 11 11 2021 https://ras.editorum.ru/en/nauka/article/47161/view

The crust in the south of the Siberian Craton includes the tonalite-trondhjemite complex of the basement, the highly metamorphozed rocks of the Kitoi Suite, the rocks of the Onot greenstone belt, ultrametamorphic rocks, the gabbroids of the Arban Complex, the metaultramafics of the Ilchira Complex, the rocks of the postultrametamorphic phase, and the metasomatic rocks of deep fault zones. The continental sialic tonalite-trondhjemite crust and the oceanic basaltic crust coexisted during the Early Archean. The rocks of the Onot greenstone belt are restricted to the linear troughs paleorifts of the early sialic tonalite-trondhjemite crust. The bottom of the belt is dominated by calc-alkalic bimodal rocks, the middle, by carbonate rocks, and the top, by clastic rocks and flysch. The processes of ultrametamorphic and postultrametamorphic allochemical transformations altered significantly the preexisting rocks. The junction zones of the Baikal granulite-gneiss and East Sayan granite-greenstone regions are marked by the wide development of the rapakivi-like granites of the Shumikha Complex, similar petrogeochemically to the maritime complex of the West Baikal region. The subconcordant linear distribution of the rocks of the Onot Belt, the ultrametamorphic and postultrametamorphic rocks, the granites of the Shumikha Complex, and the metasomatic rocks of deep fault zones testifies to their long-lasting connections with mantle sources.

The crust in the south of the Siberian Craton includes the tonalite-trondhjemite complex of the basement, the highly metamorphozed rocks of the Kitoi Suite, the rocks of the Onot greenstone belt, ultrametamorphic rocks, the gabbroids of the Arban Complex, the metaultramafics of the Ilchira Complex, the rocks of the postultrametamorphic phase, and the metasomatic rocks of deep fault zones. The continental sialic tonalite-trondhjemite crust and the oceanic basaltic crust coexisted during the Early Archean. The rocks of the Onot greenstone belt are restricted to the linear troughs paleorifts of the early sialic tonalite-trondhjemite crust. The bottom of the belt is dominated by calc-alkalic bimodal rocks, the middle, by carbonate rocks, and the top, by clastic rocks and flysch. The processes of ultrametamorphic and postultrametamorphic allochemical transformations altered significantly the preexisting rocks. The junction zones of the Baikal granulite-gneiss and East Sayan granite-greenstone regions are marked by the wide development of the rapakivi-like granites of the Shumikha Complex, similar petrogeochemically to the maritime complex of the West Baikal region. The subconcordant linear distribution of the rocks of the Onot Belt, the ultrametamorphic and postultrametamorphic rocks, the granites of the Shumikha Complex, and the metasomatic rocks of deep fault zones testifies to their long-lasting connections with mantle sources.

 Evolution of magmatism Sayan mountains Siberian Craton. Evolution of magmatism Sayan mountains Siberian Craton.

Abramovich, Problems of Precambrian Lithosphere Evolution, 1986. Abramovich, Problems of Precambrian Lithosphere Evolution, 1986. Aftalion, J. Geol., v. 99, 1991. Aftalion, J. Geol., v. 99, 1991. Bibikova, Dokl. Akad, Nauk SSSR, v. 267, no. 5, 1982. Bibikova, Dokl. Akad, Nauk SSSR, v. 267, no. 5, 1982. Bibikova, Geology and Geochronology of the Precambrian in the Siberian Craton and Its Surroundings, 1990. Bibikova, Geology and Geochronology of the Precambrian in the Siberian Craton and Its Surroundings, 1990. Bozhko, Problems of Precambrian Lithosphere Evolution, 1986. Bozhko, Problems of Precambrian Lithosphere Evolution, 1986. Borukaev, Archean Plate Tectonics, 1996. Borukaev, Archean Plate Tectonics, 1996. Collerson, Trondjemites, Dacites, and Related Rocks, 1983. Collerson, Trondjemites, Dacites, and Related Rocks, 1983. Condie, Archean Greenstone Belts, 1983. Condie, Archean Greenstone Belts, 1983. Condie, 29th Internat. Geol. Congr., Abstr., vol. 1, 1992. Condie, 29th Internat. Geol. Congr., Abstr., vol. 1, 1992. Condie, Earth Planet. Sci. Lett., v. 29, 1976., doi: 10.1016/0012-821X7690144-8 Condie, Earth Planet. Sci. Lett., v. 29, 1976., doi: 10.1016/0012-821X7690144-8 Dobretsov, Deep Crustal Geodynamics, 1994. Dobretsov, Deep Crustal Geodynamics, 1994. Dobretsov, Dokl. Akad. Nauk, v. 345, no. 1, 1995. Dobretsov, Dokl. Akad. Nauk, v. 345, no. 1, 1995. Emission..., Emission Spectral Analysis in Geochemistry, 1976. Emission..., Emission Spectral Analysis in Geochemistry, 1976. Finkelshtein, X-Ray Spectrom., v. 25, 1996., doi: 10.1002/SICI1097-453919960925:5lt;210::AID-XRS163gt;3.0.CO;2-J Finkelshtein, X-Ray Spectrom., v. 25, 1996., doi: 10.1002/SICI1097-453919960925:5lt;210::AID-XRS163gt;3.0.CO;2-J Glebovitskii, Postmigmatite Metasomatism, 1983. Glebovitskii, Postmigmatite Metasomatism, 1983. Gornova, Ofioliti, v. 24, no. 2, 1999. Gornova, Ofioliti, v. 24, no. 2, 1999. Grabkin, Structure of the Basement of the Siberian Craton in the Zone of a Marginal Suture, 1980. Grabkin, Structure of the Basement of the Siberian Craton in the Zone of a Marginal Suture, 1980. Grachev, Rift Zones of the Earth, 1977. Grachev, Rift Zones of the Earth, 1977. Grachev, Sov. Geologiya, no. 12, 1970. Grachev, Sov. Geologiya, no. 12, 1970. Grachev, Geotektonika, no. 12, 1980. Grachev, Geotektonika, no. 12, 1980. Hanter, Trondjemites, Dacites, and Related Rocks, 1983. Hanter, Trondjemites, Dacites, and Related Rocks, 1983. Hanter, Precambr. Res., v. 7, 1978., doi: 10.1016/0301-92687890030-X Hanter, Precambr. Res., v. 7, 1978., doi: 10.1016/0301-92687890030-X Keller, Tectonophysics, v. 94, 1983., doi: 10.1016/0040-19518390026-4 Keller, Tectonophysics, v. 94, 1983., doi: 10.1016/0040-19518390026-4 Khain, Historical Tectonics of the Precambrian, 1988. Khain, Historical Tectonics of the Precambrian, 1988. Kirnozova, Isotope Dating of Geologic Processes: New Methods and Solutions, Proc. 1st Ross. Conf. on Isotope Geochronology, 2000. Kirnozova, Isotope Dating of Geologic Processes: New Methods and Solutions, Proc. 1st Ross. Conf. on Isotope Geochronology, 2000. Kroner, Tectonophysics, v. 187, no. 4, 1991., doi: 10.1016/0040-19519190478-B Kroner, Tectonophysics, v. 187, no. 4, 1991., doi: 10.1016/0040-19519190478-B Levitskii, Zapiski Vseros. Min. Ob-va, CXXIII, no. 6, 1994. Levitskii, Zapiski Vseros. Min. Ob-va, CXXIII, no. 6, 1994. Levitskii, Geochemistry of Metasomatism and Its Role in the Formation of the Continental Crust, 2000. Levitskii, Geochemistry of Metasomatism and Its Role in the Formation of the Continental Crust, 2000. Levitskii, Russian Foundation for Basic Research Earth's Crust and Mantle Petrology, Geochemistry, and Mineralogy, 1995. Levitskii, Russian Foundation for Basic Research Earth's Crust and Mantle Petrology, Geochemistry, and Mineralogy, 1995. Levitskii, Granitoid Volcanoplutonic Associations, Abstracts, All-Russia Conference, 1997. Levitskii, Granitoid Volcanoplutonic Associations, Abstracts, All-Russia Conference, 1997. Levitskii, Abstr. 6th East Siberian Regional Conf. on Petrography, 1997. Levitskii, Abstr. 6th East Siberian Regional Conf. on Petrography, 1997. Lobachevskii, Sov. Geologiya, no. 5, 1985. Lobachevskii, Sov. Geologiya, no. 5, 1985. McIntyre, J. Geophys. Res., v. 71, no. 22, 1966. McIntyre, J. Geophys. Res., v. 71, no. 22, 1966. Mac-Gregor, Trondjemites, Dacites, and Related Rocks, 1983. Mac-Gregor, Trondjemites, Dacites, and Related Rocks, 1983. Mekhanoshin, Geologiya i Geofizika, v. 40, no. 12, 1999. Mekhanoshin, Geologiya i Geofizika, v. 40, no. 12, 1999. Mekhanoshin, Geology and Geochronology of the Precambrian in the Siberian Craton and Its Surroundings, 1987. Mekhanoshin, Geology and Geochronology of the Precambrian in the Siberian Craton and Its Surroundings, 1987. Melnikov, Granulite Complexes of Continental Crust, 1991. Melnikov, Granulite Complexes of Continental Crust, 1991. Milanovskii, Rifting in the Earth's History, 1983. Milanovskii, Rifting in the Earth's History, 1983. Monin, The Early History of the Earth, 1987. Monin, The Early History of the Earth, 1987. Nonmetallic..., Nonmetallic Mineral Deposits of the USSR, 1984. Nonmetallic..., Nonmetallic Mineral Deposits of the USSR, 1984. Nozhkin, Geol. Geofiz., v. 36, no. 3, 1995. Nozhkin, Geol. Geofiz., v. 36, no. 3, 1995. Petrova, Geochemistry of Granulite-Gneiss Complexes, 1990. Petrova, Geochemistry of Granulite-Gneiss Complexes, 1990. Petrova, Petrology and Geochemistry of Granulite Complexes in the Baikal Region, 1984. Petrova, Petrology and Geochemistry of Granulite Complexes in the Baikal Region, 1984. Poletaev, Metasomatic Processes and Structural Control during the Formation of the Savina Co-bearing Massive Sulfide Deposit, 1973. Poletaev, Metasomatic Processes and Structural Control during the Formation of the Savina Co-bearing Massive Sulfide Deposit, 1973. Precambrian..., Precambrian and Paleozoic Evolution of the Earth's Crust in the Sayan-Baikal Fold Region, 1988. Precambrian..., Precambrian and Paleozoic Evolution of the Earth's Crust in the Sayan-Baikal Fold Region, 1988. Sandimirova, Izotope Geology of the Precambrian, 1979. Sandimirova, Izotope Geology of the Precambrian, 1979. Sandimirova, Dokl. Akad. Nauk SSSR, v. 326, no. 4, 1992. Sandimirova, Dokl. Akad. Nauk SSSR, v. 326, no. 4, 1992. Sandimirova, Isotope Dating of Endogenic Metalliferous Rocks, 1993. Sandimirova, Isotope Dating of Endogenic Metalliferous Rocks, 1993. Shames, Geology of the USSR, Irkutsk Region, vol. 27, 1962. Shames, Geology of the USSR, Irkutsk Region, vol. 27, 1962. Sharkov, Geologiya i Geofizika, v. 37, no. 1, 1996. Sharkov, Geologiya i Geofizika, v. 37, no. 1, 1996. Shafeev, Petrology and Mineralogy of Metamorphic Rocks in Eastern Siberia, 1981. Shafeev, Petrology and Mineralogy of Metamorphic Rocks in Eastern Siberia, 1981. Shcherbakov, Litol. Polezn. Iskop., no. 6, 1977. Shcherbakov, Litol. Polezn. Iskop., no. 6, 1977. Sleep, Canad. J. Earth Sci., v. 29, no. 10, 1992. Sleep, Canad. J. Earth Sci., v. 29, no. 10, 1992. Smirnova, Geochemistry of Rare Earth Elements in Endogenic Processes, 1982. Smirnova, Geochemistry of Rare Earth Elements in Endogenic Processes, 1982. Tauson, Dokl. Akad. Nauk SSSR, v. 273, no. 5, 1983. Tauson, Dokl. Akad. Nauk SSSR, v. 273, no. 5, 1983. Trondjemites..., Trondjemites, Dacites and Related Rocks, 1983. Trondjemites..., Trondjemites, Dacites and Related Rocks, 1983. York, Canad. I. Phys., v. 44, no. 5, 1966. York, Canad. I. Phys., v. 44, no. 5, 1966. Upton, Petrology and Geochemistry of Continental Rifts, 1978. Upton, Petrology and Geochemistry of Continental Rifts, 1978.