Structure, age, and geodynamic settings of early Neoproterozoic magmatic complexes of the Central Asian fold belt exemplified by the Holbo Nur zone of Songin terrane

Yarmolyuk, V. V.; Kozlovsky, A. M.; Сальникова, Е. Б.; Козаков, И. К.; Ковач, В. П.; Котов, А. Б.; Tomurtogoo, O.

doi:10.1134/s1028334x15110082

Cited by 20 publications

(5 citation statements)

References 7 publications

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“…The lower-grade rocks are made up of volcanogenic, clastic-volcanogenic, and clastic rocks, variably metamorphosed from greenschist-to upper amphibolite-facies. Moderateand high-Ti basalts of the volcanogenic sequences are comparable to modern N-MORB and E-MORB-OIB oceanic rocks, whereas a differentiated basalt-andesiterhyolite volcanic sequence and associated clastic sediments are interpreted as analogues of modern island arcs and accretionary wedges Yarmolyuk et al, 2015]. Zircon ages and Nd isotopic data suggest early Neoproterozoic (ca.…”

mentioning

confidence: 89%

Early Neoproterozoic Crust Formaton in the Dzabkhan Microcontinent, Central Asian Orogenic Belt

Ковач

Козаков

Kröner

et al. 2017

Geodin. tektonofiz.

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mentioning

confidence: 89%

Early Neoproterozoic Crust Formaton in the Dzabkhan Microcontinent, Central Asian Orogenic Belt

Ковач

Козаков

Kröner

et al. 2017

Geodin. tektonofiz.

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“…T Nd (DM)=1037-1038 млн лет указывает на мезонеопротерозойский возраст протолитов континентальной коры. Ассоциирующие с вулканитами гранитоиды гашунурского и дзабханского комплексов с возрастом 859 и 856 млн лет также имеют положительные величины ε Nd (T) от +1.6 до +3.1, но более древние (мезопротерозойские) Nd модельные возрасты протолитов T Nd (DM) и T Nd (DM-2st) от 1400 до 1900 млн лет [Yarmolyuk et al, 2015[Yarmolyuk et al, , 2017Kozakov et al, 2013].…”

Section: рисunclassified

“…Аккреционно-коллизионные процессы позднебайкальского этапа проявились также среди других неопротерозойских островодужных систем Монголо-Забайкальского региона (Катаевская, Метешихинская, Сонгинская (Холбонурская), Сархойская в Тувино-Монгольском блоке и др.). В их пределах процессы коллизии развивались одновременно или после формирования зон субдукции [Gordienko, 2004[Gordienko, , 2006[Gordienko, , 2019aYarmolyuk et al, 2015Yarmolyuk et al, , 2017.…”

Section: аккреционно-коллизионные процессы в формировании континенталunclassified

The role of island-arc oceanic, collisional and intraplate magmatism in the formation of continental crust in the Mongolia-Trasnbaikalia region: geostructural, geochronological and Sm-Nd isotope data

Гордиенко

2021

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The formation of continental crust in the Mongolia-Transbaikalia region is researched to identify the mechanisms of interactions between the crust and the mantle in the development of the Neoarchean, Proterozoic and Paleozoic magmatic and sedimentary complexes in the study area. Using the results of his own studies conducted for many years and other published data on this vast region of Central Asia, the author have analysed compositions, ages and conditions for the formation of Karelian, Baikalian, Caledonian and Hercynian structure-formational complexes in a variety of geodynamic settings. Based on the geostructural, petrological, geochemical, geochronological and Sm-Nd isotope data, he determines the crustal and mantle sources of magmatism, conducts the identification and mapping of isotopic provinces, and reveals the role of island-arc oceanic, accretion-collision and intraplate magmatism in the formation of continental crust. Considering the formation of the bulk continental crust, three main stages are distinguished: (1) Neoarchean and Paleoproterozoic (Karelian) (almost 30% of the crust volume), (2) Meso-Neoproterozoic (Baikalian) (50%), and (3) Paleozoic (Caledonian and Hercynian) (over 20%). This sequence of the evolution stages shows the predominance of the ancient crustal material in igneous rocks sources at the early stage. During the subsequent stages, tectonic structures created earlier were repeatedly reworked, and mixed crustal-mantle and juvenile sources were widely involved in the formation of the bulk continental crust in the study area.

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“…The lower-grade rocks are made up of volcanogenic, clastic-volcanogenic, and clastic rocks, variably metamorphosed from greenschist-to upper amphibolite-facies. Moderateand high-Ti basalts of the volcanogenic sequences are comparable to modern N-MORB and E-MORB-OIB oceanic rocks, whereas a differentiated basalt-andesiterhyolite volcanic sequence and associated clastic sediments are interpreted as analogues of modern island arcs and accretionary wedges [Kovach et al, 2013;Yarmolyuk et al, 2015]. Zircon ages and Nd isotopic data suggest early Neoproterozoic (ca.…”

mentioning

confidence: 91%

Zircon ages and Nd–Hf isotopes in UHT granulites of the Ider Complex: A cratonic terrane within the Central Asian Orogenic Belt in NW Mongolia

Kröner¹,

Ковач²,

Козаков³

et al. 2015

Gondwana Research

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Structure, age, and geodynamic settings of early Neoproterozoic magmatic complexes of the Central Asian fold belt exemplified by the Holbo Nur zone of Songin terrane

Cited by 20 publications

References 7 publications

Early Neoproterozoic Crust Formaton in the Dzabkhan Microcontinent, Central Asian Orogenic Belt

Early Neoproterozoic Crust Formaton in the Dzabkhan Microcontinent, Central Asian Orogenic Belt

The role of island-arc oceanic, collisional and intraplate magmatism in the formation of continental crust in the Mongolia-Trasnbaikalia region: geostructural, geochronological and Sm-Nd isotope data

Zircon ages and Nd–Hf isotopes in UHT granulites of the Ider Complex: A cratonic terrane within the Central Asian Orogenic Belt in NW Mongolia

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