Metamorphism of the Chupa Gneisses and Gabbroids in the Belomorian Mobile Belt, Fennoscandian Shield, Northwestern Russia: A Comparative Study of the P–T Partial Melting Parameters and Isotopic Age of the Migmatized Rocks.
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| Title: | Metamorphism of the Chupa Gneisses and Gabbroids in the Belomorian Mobile Belt, Fennoscandian Shield, Northwestern Russia: A Comparative Study of the P–T Partial Melting Parameters and Isotopic Age of the Migmatized Rocks. |
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| Authors: | Yurchenko, A. V.1 (AUTHOR) yurchenko-nastya@yandex.ru, Baltybaev, Sh. K.1,2 (AUTHOR) shauket@mail.ru, Galankina, O. L.1 (AUTHOR), Rizvanova, N. G.1 (AUTHOR), Nikolaeva, A. M.2 (AUTHOR), Myskova, T. A.1 (AUTHOR) |
| Source: | Petrology. Jun2026, Vol. 34 Issue 3, p264-280. 17p. |
| Subject Terms: | *Radioactive dating, *Metamorphic rocks, *Igneous intrusions, *Orogenic belts, *Shields (Geology), *Melting, *Recrystallization (Geology) |
| Abstract: | The rocks of the Chupa paragneiss formation are intruded by bodies of gabbroids (gabbro-norites and gabbro-anorthosites), and all of the rocks are metamorphosed. The estimated P–T metamorphic parameters are T = 650–750°C and higher and P = 8–11 kbar. The U–Pb monazite and titanite dates indicate that the early Proterozoic metamorphism and migmatization of the Chupa aluminous gneisses and gabbro-anorthosites occurred 1845 ± 4 Ma (titanite age) and 1855 ± 4 Ma (monazite age). Despite the 10-Ma age difference obtained from the two minerals, they could form during a single event that affected the gabbroids and their host gneisses, and the age difference between the titanite and monazite is a consequence of the lower closure temperature of the U–Pb system of titanite compared to that of monazite. The P–T parameters of metamorphism and migmatization, corresponding to the conditions of the high-temperature amphibolite and low-temperature high-pressure granulite facies, likely pertain to the formation of the Belomorian complex as a foreland structure in the Paleoproterozoic. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 194200541 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Metamorphism of the Chupa Gneisses and Gabbroids in the Belomorian Mobile Belt, Fennoscandian Shield, Northwestern Russia: A Comparative Study of the P–T Partial Melting Parameters and Isotopic Age of the Migmatized Rocks. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Yurchenko%2C+A%2E+V%2E%22">Yurchenko, A. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yurchenko-nastya@yandex.ru</i><br /><searchLink fieldCode="AR" term="%22Baltybaev%2C+Sh%2E+K%2E%22">Baltybaev, Sh. K.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> shauket@mail.ru</i><br /><searchLink fieldCode="AR" term="%22Galankina%2C+O%2E+L%2E%22">Galankina, O. L.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rizvanova%2C+N%2E+G%2E%22">Rizvanova, N. G.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nikolaeva%2C+A%2E+M%2E%22">Nikolaeva, A. M.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Myskova%2C+T%2E+A%2E%22">Myskova, T. A.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Petrology%22">Petrology</searchLink>. Jun2026, Vol. 34 Issue 3, p264-280. 17p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Radioactive+dating%22">Radioactive dating</searchLink><br />*<searchLink fieldCode="DE" term="%22Metamorphic+rocks%22">Metamorphic rocks</searchLink><br />*<searchLink fieldCode="DE" term="%22Igneous+intrusions%22">Igneous intrusions</searchLink><br />*<searchLink fieldCode="DE" term="%22Orogenic+belts%22">Orogenic belts</searchLink><br />*<searchLink fieldCode="DE" term="%22Shields+%28Geology%29%22">Shields (Geology)</searchLink><br />*<searchLink fieldCode="DE" term="%22Melting%22">Melting</searchLink><br />*<searchLink fieldCode="DE" term="%22Recrystallization+%28Geology%29%22">Recrystallization (Geology)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The rocks of the Chupa paragneiss formation are intruded by bodies of gabbroids (gabbro-norites and gabbro-anorthosites), and all of the rocks are metamorphosed. The estimated P–T metamorphic parameters are T = 650–750°C and higher and P = 8–11 kbar. The U–Pb monazite and titanite dates indicate that the early Proterozoic metamorphism and migmatization of the Chupa aluminous gneisses and gabbro-anorthosites occurred 1845 ± 4 Ma (titanite age) and 1855 ± 4 Ma (monazite age). Despite the 10-Ma age difference obtained from the two minerals, they could form during a single event that affected the gabbroids and their host gneisses, and the age difference between the titanite and monazite is a consequence of the lower closure temperature of the U–Pb system of titanite compared to that of monazite. The P–T parameters of metamorphism and migmatization, corresponding to the conditions of the high-temperature amphibolite and low-temperature high-pressure granulite facies, likely pertain to the formation of the Belomorian complex as a foreland structure in the Paleoproterozoic. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S0869591126700025 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 17 StartPage: 264 Subjects: – SubjectFull: Radioactive dating Type: general – SubjectFull: Metamorphic rocks Type: general – SubjectFull: Igneous intrusions Type: general – SubjectFull: Orogenic belts Type: general – SubjectFull: Shields (Geology) Type: general – SubjectFull: Melting Type: general – SubjectFull: Recrystallization (Geology) Type: general Titles: – TitleFull: Metamorphism of the Chupa Gneisses and Gabbroids in the Belomorian Mobile Belt, Fennoscandian Shield, Northwestern Russia: A Comparative Study of the P–T Partial Melting Parameters and Isotopic Age of the Migmatized Rocks. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Yurchenko, A. V. – PersonEntity: Name: NameFull: Baltybaev, Sh. K. – PersonEntity: Name: NameFull: Galankina, O. L. – PersonEntity: Name: NameFull: Rizvanova, N. G. – PersonEntity: Name: NameFull: Nikolaeva, A. M. – PersonEntity: Name: NameFull: Myskova, T. A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 08695911 Numbering: – Type: volume Value: 34 – Type: issue Value: 3 Titles: – TitleFull: Petrology Type: main |
| ResultId | 1 |
