Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Early Triassic Monzonite–Granite Series in Eastern Kazakhstan as a Reflection of Siberian Large Igneous Province Activity. / Khromykh, Sergey V.; Kotler, Pavel D.; Kulikova, Anna V. и др.
в: Minerals, Том 12, № 9, 1101, 09.2022.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - Early Triassic Monzonite–Granite Series in Eastern Kazakhstan as a Reflection of Siberian Large Igneous Province Activity
AU - Khromykh, Sergey V.
AU - Kotler, Pavel D.
AU - Kulikova, Anna V.
AU - Semenova, Dina V.
AU - Minnebaev, Kamil R.
AU - Gareev, Bulat I.
AU - Batalin, Georgii A.
AU - Antsiferova, Tatiana N.
AU - Il’icheva, Ekaterina A.
AU - Volosov, Alexey S.
N1 - Funding Information: This research was carried out on a government assignment to the Institute of Geology and Mineralogy SB RAS, Novosibirsk. U-Pb isotope dating was funded by the Ministry of Science and High Education of the Russian Federation (contract no. 14.Y26.31.0029, resolution no. 220 of the Government of the Russian Federation). Field work and study of petrography and geochemistry of Delbegetei massif rocks were funded by the Russian Science Foundation (project no. 21-17-00175). Study of petrography and geochemistry of Semeitau massif rocks were funded by the Council of the President of the Russian Federation for Young Candidates of Sciences (project MK-1870.2022.1.5). Publisher Copyright: © 2022 by the authors.
PY - 2022/9
Y1 - 2022/9
N2 - We provide the results of studying the internal structure and composition of the rocks of the Semeitau and Delbegetei massifs located in Eastern Kazakhstan. It was previously believed that these massifs have different ages and were formed in different geodynamic settings. The U-Pb zircon age from the monzonites and quartz monzonites was determined to be 249 ± 2 Ma, which showed the same Early Triassic age of the massifs. Both massifs are composed of rocks of the same monzonite–granite series of rocks with a significant proportion of high-silica rocks (leucocratic granites). Intermediate rocks are formed due to the differentiation of subalkaline mafic magmas, and the felsic rocks (rhyolites and granites) are the result of partial melting of crustal substrates. The massif formation model assumes the intrusion of mafic magmas into the crust, their differentiation and mixing with crustal melts, and then the intrusion of various rocks into the upper crustal levels. Analysis of the geological position, age and composition of the rocks allows us to conclude that the Semeitau and Delbegetei massifs were formed in an intraplate geodynamic setting. The activity of the mantle plume is the most probable reason for their formation. The Semeitau and Delbegetei massifs can be included in the southern part of the range of the Early Triassic Siberian Large Igneous Province.
AB - We provide the results of studying the internal structure and composition of the rocks of the Semeitau and Delbegetei massifs located in Eastern Kazakhstan. It was previously believed that these massifs have different ages and were formed in different geodynamic settings. The U-Pb zircon age from the monzonites and quartz monzonites was determined to be 249 ± 2 Ma, which showed the same Early Triassic age of the massifs. Both massifs are composed of rocks of the same monzonite–granite series of rocks with a significant proportion of high-silica rocks (leucocratic granites). Intermediate rocks are formed due to the differentiation of subalkaline mafic magmas, and the felsic rocks (rhyolites and granites) are the result of partial melting of crustal substrates. The massif formation model assumes the intrusion of mafic magmas into the crust, their differentiation and mixing with crustal melts, and then the intrusion of various rocks into the upper crustal levels. Analysis of the geological position, age and composition of the rocks allows us to conclude that the Semeitau and Delbegetei massifs were formed in an intraplate geodynamic setting. The activity of the mantle plume is the most probable reason for their formation. The Semeitau and Delbegetei massifs can be included in the southern part of the range of the Early Triassic Siberian Large Igneous Province.
KW - Early Triassic magmatism
KW - Eastern Kazakhstan
KW - granites
KW - monzonites
KW - Siberian Large Igneous Province
UR - http://www.scopus.com/inward/record.url?scp=85138731874&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/cec0f371-f139-3506-ba8f-62c501f0db08/
U2 - 10.3390/min12091101
DO - 10.3390/min12091101
M3 - Article
AN - SCOPUS:85138731874
VL - 12
JO - Minerals
JF - Minerals
SN - 2075-163X
IS - 9
M1 - 1101
ER -
ID: 38047192