T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in Minerals
This paper presents the results of a study of isotopic systems in minerals and rocks in southern margin of the epi-Archean Karelian craton in the zone of its junction with the Svecofennian mobile belt. U-Pb, Sm-Nd and Rb-Sr mineral ages of metamorphic rocks allowed reconstructing a T-t trend during...
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Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust
2024-06-01
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| Series: | Геодинамика и тектонофизика |
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| Online Access: | https://www.gt-crust.ru/jour/article/view/1848 |
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| author | Sh. K. Baltybaev V. M. Savatenkov M. E. Petrakova |
| author_facet | Sh. K. Baltybaev V. M. Savatenkov M. E. Petrakova |
| author_sort | Sh. K. Baltybaev |
| collection | DOAJ |
| description | This paper presents the results of a study of isotopic systems in minerals and rocks in southern margin of the epi-Archean Karelian craton in the zone of its junction with the Svecofennian mobile belt. U-Pb, Sm-Nd and Rb-Sr mineral ages of metamorphic rocks allowed reconstructing a T-t trend during ~1.88–1.61 Ga, which reflects a wide-ranging cooling history of metamorphic rocks from the peak values of about 650–700 °C at 1.88–1.79 Ga (U-Pb age of monazites and apparent oldest Sm-Nd age of amphiboles) to 300–400 °C at 1.61 Ga (model Rb-Sr age of biotites) in zones of low- and medium-temperature metamorphism. The specificity of removal of deep-seated rocks to the present-day erosion surface and the reconstructed T-t trend comply with the development of thrust-nappe structures during the exhumation of the Svecofennids. It is also assumed that differential vertical block movements played a significant role during the post-orogenic extensional collapse and neorifting. |
| format | Article |
| id | doaj-art-764d4071b09748d9be4dbe1efdc31073 |
| institution | Kabale University |
| issn | 2078-502X |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust |
| record_format | Article |
| series | Геодинамика и тектонофизика |
| spelling | doaj-art-764d4071b09748d9be4dbe1efdc310732025-08-20T03:59:45ZengRussian Academy of Sciences, Siberian Branch, Institute of the Earth's crustГеодинамика и тектонофизика2078-502X2024-06-0115310.5800/GT-2024-15-3-0759760T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in MineralsSh. K. Baltybaev0V. M. Savatenkov1M. E. Petrakova2Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences; Saint Petersburg State UniversityInstitute of Precambrian Geology and Geochronology, Russian Academy of SciencesInstitute of Precambrian Geology and Geochronology, Russian Academy of SciencesThis paper presents the results of a study of isotopic systems in minerals and rocks in southern margin of the epi-Archean Karelian craton in the zone of its junction with the Svecofennian mobile belt. U-Pb, Sm-Nd and Rb-Sr mineral ages of metamorphic rocks allowed reconstructing a T-t trend during ~1.88–1.61 Ga, which reflects a wide-ranging cooling history of metamorphic rocks from the peak values of about 650–700 °C at 1.88–1.79 Ga (U-Pb age of monazites and apparent oldest Sm-Nd age of amphiboles) to 300–400 °C at 1.61 Ga (model Rb-Sr age of biotites) in zones of low- and medium-temperature metamorphism. The specificity of removal of deep-seated rocks to the present-day erosion surface and the reconstructed T-t trend comply with the development of thrust-nappe structures during the exhumation of the Svecofennids. It is also assumed that differential vertical block movements played a significant role during the post-orogenic extensional collapse and neorifting.https://www.gt-crust.ru/jour/article/view/1848thermochronologymetamorphic rocksmonaziteamphibolebiotitetitaniteu-pbsm-ndrb-srnorthern ladoga regioncooling history |
| spellingShingle | Sh. K. Baltybaev V. M. Savatenkov M. E. Petrakova T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in Minerals Геодинамика и тектонофизика thermochronology metamorphic rocks monazite amphibole biotite titanite u-pb sm-nd rb-sr northern ladoga region cooling history |
| title | T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in Minerals |
| title_full | T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in Minerals |
| title_fullStr | T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in Minerals |
| title_full_unstemmed | T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in Minerals |
| title_short | T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in Minerals |
| title_sort | t t evolution of the early proterozoic rocks in the northern ladoga region from the data on u pb rb sr and sm nd systems in minerals |
| topic | thermochronology metamorphic rocks monazite amphibole biotite titanite u-pb sm-nd rb-sr northern ladoga region cooling history |
| url | https://www.gt-crust.ru/jour/article/view/1848 |
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