Early Paleozoic monzodiorite–granodiorite association in the northeastern flank of the South Mongolia–Khingan orogenic belt (Nora–Sukhotinsky Terrane): Age and tectonic setting

2016 ◽  
Vol 10 (2) ◽  
pp. 123-131 ◽  
Author(s):  
Yu. V. Smirnov ◽  
A. A. Sorokin ◽  
A. B. Kotov ◽  
E. B. Sal’nikova ◽  
S. Z. Yakovleva ◽  
...  
Keyword(s):  
Tectonic Setting ◽  
Orogenic Belt ◽  
Early Paleozoic ◽  
The South ◽  
Northeastern Flank

scholarly journals Tectonic setting of the South China Block in the early Paleozoic: Resolving intracontinental and ocean closure models from detrital zircon U-Pb geochronology

Tectonics ◽  
2010 ◽  
Vol 29 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yuejun Wang ◽  
Feifei Zhang ◽  
Weiming Fan ◽  
Guowei Zhang ◽  
Shiyue Chen ◽  
...  
Keyword(s):  
South China ◽  
Detrital Zircon ◽  
Tectonic Setting ◽  
South China Block ◽  
Early Paleozoic ◽  
The South ◽  
Closure Models

scholarly journals THE FIRST EVIDENCE OF LATE DEVONIAN GRANITOID MAGMATISM IN THE NORTHEASTERN FLANK OF THE SOUTH MONGOLIA–KHINGAN OROGENIC BELT

2021 ◽  
pp. 65-76
Author(s):  
Y.V. Smirnov ◽  
◽  
A.A. Sorokin ◽  
N.M. Kudryashov ◽  
◽  
...  
Keyword(s):  
Continental Margin ◽  
Orogenic Belt ◽  
Late Devonian ◽  
The South ◽  
Granitoid Magmatism ◽  
Margin Setting ◽  
Low Concentrations ◽  
History Of ◽  
Northeastern Flank ◽  
Geochemical Studies

The results of geochemical, U-Pb geochronological, Sm-Nd isotopic-geochemical studies of granites of the Medvedka Massif in the northern part of the Nora–Sukhotino terrane are presented. It has been found that these granites are of 378 ± 3 Ma in age. It was shown that these granites are characterized by the presence of ferruginous silicates, high iron index (FeO*/(FeO*+MgO)), low concentrations of Al2O3, CaO, MgO, high contents of Nb, Ga, Y, deficiency of Sr, Eu, positive values of εNd(t) (+3.0...+4.1), and high values of the ratio Y/Nb. In total, this indicates that the granites of the Medvedka massif are related to A2-type granites. The Late Devonian hastingsite-biotite granites of the Medvedka Massif most likely reflect evidence of the transform continental margin setting in the history of the formation of the South Mongolian – Khingan orogenic belt.

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