Early Paleozoic geodynamic evolution of the Eastern Central Asian Orogenic Belt: Insights from granitoids in the Xing’an and Songnen blocks

Hu, Xinlu; Yao, Shuzhen; Tan, Cheng‐Yin; Guo-ping, Zeng; Ding, Zhenju; He, Maowei

doi:10.1016/j.gsf.2020.05.018

Cited by 10 publications

(10 citation statements)

References 104 publications

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“…Ранее мы отмечали, что в структуре Мамынского террейна эдиакарские образования выявлены сравнительно недавно и в ограниченном количестве. Однако можно отметить то, что эдиакарские цирконы из кристаллокластического туфа бассейна р. Берея по Lu-Hf изотопному составу близки к цирконам из раннепалеозойских и неопротерозойских образований блока Синъян (Xing'an) [18,21] Рис. 9.…”

Section: обсуждение результатовunclassified

Block of Ediacaran Volcanic Rocks in the South Mongolia-Khingan Orogenic Belt

Smirnov¹,

Kudryashov²

2022

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The publication presents the results of studies on chemical composition of rocks from the volcanogenic part of the Shirokopadinskaya Formation in the Bereya River basin of the Amur fragment of the northeastern flank of the South Mongolia–Khingan orogenic belt, as well as the results of geochronological (U-Th-Pb, LA-ICP-MS) and isotopic (Lu-Hf) studies on zircons from crystalloclastic tuff. Metaandesite-basalts, their tuffs and tuffites dominate among the volcanic and volcano-sedimentary rocks from the Shirokopadinskaya Formation. The geochemical features of the rocks and Hf-isotopic composition of zircons from volcanic rocks indicate their suprasubduction origin. The concordant age of the youngest zircon population from crystal tuff is 589 ± 5 Ma (MSWD = 0.60, concordance probability = 0.90 %), which corresponds to the Ediacaran. These zircons are characterized by well-preserved crystal faceting without traces of roundness. In our opinion, the age of the tuffs reflects the age of volcanism and the studied volcanic rocks. The data are rather unexpected, because the most ancient rocks of the oceanic crust of the South Mongolia–Khingan orogenic belt are Ordovician in age, which means the studied volcanic rocks are more than 100 million years older and cannot be part of the South Mongolia–Khingan belt. Ediacaran volcanic rocks, considering their structural position, are located at the boundary between the South Mongolia–Khingan orogenic belt and the Mamyn (Xing’an) terrane. They are a fragment of the Mamyn (Xing’an) terrane, which was tectonically placed into the modern structure of the South Mongolia–Khingan orogenic belt. This conclusion is supported by the occurrence of formations in the Mamyn (Xing’an) terrane that are similar in age and geochemical features.

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Section: обсуждение результатовunclassified

Block of Ediacaran Volcanic Rocks in the South Mongolia-Khingan Orogenic Belt

Smirnov¹,

Kudryashov²

2022

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“…Кривые относительной вероятности возрастов детритовых цирконов для песчаника (обр. Z-94) бассейна р. Белой приамурского фрагмента Нора-Сухотинского террейна (а), магматических и метаморфических пород Буреинского террейна по данным [Guryanov et al, 2018;Ovchinnikov et al, 2021;Sorokin et al, 2011aSorokin et al, , 2011bSorokin et al, , 2016Sorokin et al, , 2017bSorokin et al, , 2019Yang et al, 2020] (б), магматических и метаморфических пород Мамынского террейна по данным [Sorokin, Kudryashov, 2017;Sorokin et al, 2004Sorokin et al, , 2015Ge et al, 2007;Hu et al, 2020;Li Z.Z. et al, 2018;Wu F.Y.…”

Section: Figunclassified

“…Relative probability curves showing age distributions of detrital zircons from (a) sandstones (sample Z-94) of the Belaya River basin of the Amur fragment of the Nora-Sukhotino terrane), igneous and metamorphic rocks of the Bureya terrane after [Guryanov et al, 2018;Ovchinnikov et al, 2021;Sorokin et al, 2011aSorokin et al, , 2011bSorokin et al, , 2016Sorokin et al, , 2017bSorokin et al, , 2019Yang et al, 2020] (б), igneous and metamorphic rocks of the Mamyn terrane after [Sorokin, Kudryashov, 2017;Sorokin et al, 2004Sorokin et al, , 2015Ge et al, 2007;Hu et al, 2020;Li Z.Z. et al, 2018;Wu F.Y.…”

Section: Figmentioning

confidence: 99%

“…Диаграмма возраст (млн лет) -ε Hf(t) для цирконов из 1 -песчаника (обр. Z-94) бассейна р. Белой приамурского фрагмента Нора-Сухотинского террейна, 2 -магматических образований Буреинского террейна [Ovchinnikov et al, 2021;Sorokin et al, 2019;Yang et al, 2020], 3 -магматических образований Мамынского террейна [Hu et al, 2020;Li Z.Z. et al, 2018].…”

Section: Figunclassified

“…1) на северо-западе ограничен Мамынским террейном, который в российской геологической литературе выделяется в качестве восточной части Аргунского супертеррейна [Parfenov et al, 2001;Khanchuk, 2006;и др.]. В англоязычных тектонических схемах [Hu et al, 2020;Liu Y. et al, 2017;Wu F.Y. et al, 2011;и др.…”

Section: Introductionunclassified

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SOURCES OF LOWER PALEOZOIC SANDSTONES FROM THE NORA-SUKHOTINO TERRANE: RESULTS OF U-Th-Pb AND Lu-Hf ISOTOPE STUDIES OF THE DETRITAL ZIRCONS

Smirnov

2022

Geodin. tektonofiz.

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This paper presents the results of comprehensive geological and geochemical studies of sandstones from the Belaya basin of the Amur fragment of the Nora-Sukhotino terrane of the northeastern flank of South Mongolia-Khingan orogenic belt, as well as the results of isotopic (U-Th-Pb and Lu-Hf) studies of detrital zircons therefrom. The sandstones from the Belaya basin are characterized by significant variations in the composition of clastic material and major rock-forming elements, and by correspondence to arkoses and litharenites. They were accumulated due to erosion of geochemically mature felsic and intermediate igneous rocks. The sandstones are dominated by Ordovician, Cambrian, and Neoproterozoic zircons. The youngest zircons in sandstones from the Belaya basin are dated back to 451±8 Ma, with the lower age boundary set at the Late Ordovician. The Ordovician zircons, which have positive ε Hf(t) values and Early Paleozoic -Neoproterozoic Hf-model ages, could have been derived from island arc complexes. The Cambrian and Neoproterozoic zircon grains with positive ε Hf(t) values and Neo -Mesoproterozoic Hf-model ages could have been derived from Early Paleozoic and Neoproterozoic igneous rocks of the Bureya or Mamyn terranes. The available geological materials provide evidence that the sandstones from the Belaya basin are a fragment of the Early Paleozoic accretionary complex, which formed in the Early Paleozoic along the southeastern margin of the Mamyn (Xing'an) massif. However, a small amount of data on the Early Paleozoic and Neoproterozoic magmatism of the region hinders drawing more definite conclusions.

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Fluid evolution and ore genesis of the A'gui Cu deposit in southern Great Xing'an Range, Northeast China: Evidence from fluid inclusion and C–H–O–S–Pb isotopes

Wang

et al. 2023

Geochemistry

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Early Paleozoic geodynamic evolution of the Eastern Central Asian Orogenic Belt: Insights from granitoids in the Xing’an and Songnen blocks

Cited by 10 publications

References 104 publications

Block of Ediacaran Volcanic Rocks in the South Mongolia-Khingan Orogenic Belt

Block of Ediacaran Volcanic Rocks in the South Mongolia-Khingan Orogenic Belt

SOURCES OF LOWER PALEOZOIC SANDSTONES FROM THE NORA-SUKHOTINO TERRANE: RESULTS OF U-Th-Pb AND Lu-Hf ISOTOPE STUDIES OF THE DETRITAL ZIRCONS

Fluid evolution and ore genesis of the A'gui Cu deposit in southern Great Xing'an Range, Northeast China: Evidence from fluid inclusion and C–H–O–S–Pb isotopes

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