О возрасте наиболее древних пегматитов свекофеннского блока в Северном Приладожье (ЮВ Фенноскандинавского щита)
Ключевые слова:
U-Pb датирование, монацит, пегматит, гранит, свекофеннский блок
Аннотация
Введение: В свекофеннском блоке Северного Приладожья, где развит палеопротерозойский метаморфический комплекс, U-Pb датированием монацита выявлены наиболее древние для этого региона гранитные пегматиты, знаменующие завершение активной фазы плутоно-метаморфического развития структур региона. Предшествующими исследованиями свекофеннид Северного Приладожья основная фаза плутоно-метаморфической активности региона оценивалась возрастным интервалом 1881–1860 млн лет. Эти оценки основывались на U-Pb датировании циркона и монацита из различных гранитоидов и связанных с ними пегматоидных жил. Методика: Для определения возраста пегматитовой жилы было проведено U-Pb геохронологическое исследование (ID-TIMS). Результаты и обсуждение: Выявленный возраст изученного нами пегматита (1869 ± 5 млн лет) оказался несколько древнее известных ранее возрастов пегматитов и гранитов (1858–1860 млн лет), что сужает ранее предполагаемый временной диапазон проявления интенсивных плутоно-метаморфических преобразований в регионе. Аналогичная весьма короткая длительность активной фазы плутоно-метаморфических событий (ок. 15 млн лет) ранее выявлялась при датировании син- и посткинематических гранитов из Центрально-Финляндского гранитоидного комплекса, расположенного к северо-западу от Северного Приладожья. Заключение: Совпадение длительности эндогенной активности в свекофеннском блоке Приладожья с длительностью, установленной для Центрально-Финляндского гранитоидного комплекса, дает возможность проводить более тесные и точные корреляции при анализе сценариев тектонического развития протерозойских пород этих смежных регионов.
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Литература
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17. Skytta P., Manttari I. Structural setting of late Svecofennian granites and pegmatites in Uusimaa Belt, SWFinland: Age constraints and implications for crustal evolution. Precambrian Research, 2008, vol. 164, pp. 86–109. DOI
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19. Xiong Y.-Q., Jiang Sh.-Y., Wen Ch.-H., Yu H.-Y. Granite– pegmatite connection and mineralization age of the giant Renli Ta-Nb deposit in South China: constraints from U–Th–Pb geochronology of coltan, monazite, and zircon. Lithos, 2020, pp. 358–359. DOI
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2. Baltybaev Sh. K., Levchenkov O. A., Berezhnaja N. G., Levskij L. K., Makeev A. F., Jakovleva S. Z. Vremja i dlitel'nost' svekofennskoj plutono-metamorficheskoj aktivnosti na jugovostoke Baltijskogo shhita, Priladozh'e [Age and duration of Svecofennian plutono-metamorphic activity in the Ladoga area, southeastern Baltic Shield]. Petrologija – Petrology, 2004a, vol. 12, no. 4, pp. 330–347 (In. Russ.)
3. Baltybaev Sh. K., Levchenkov O. A., Glebovickij V. A. Ocenka vremeni regional'noj postmigmatitovoj kalishpatizacii po dannym U-Pb datirovanija monacita (Metamorficheskij kompleks Severnogo Priladozh'ja, Rossija) [Timing of the regional postmigmatitic K-feldspar mineralization on the base of U-Pb dating of monazite (Metamorphic Complex of the Northern Ladoga Region)]. Doklady Akademii Nauk –Doklady Earth Sciences, 2010, vol. 430, no. 2, pp. 186–189 (In Russ.)
4. Baltybaev Sh. K., Glebovitsky V. A., Kozyreva I. V., Shuldiner V. I. Meierskii nadvig – glavnyi element stroeniya sutury na granitse Karel’skogo kratona i Svekofennskogo poyasa v Priladozh’e, Baltiiskii shchit [The Meyeri Thrust: The main element of the suture at the boundary between the Karelian Craton and the Svecofennian belt in the Ladoga region of the Baltic Shield]. Doklady Akademii Nauk – Doklady Earth Sciences, 1996, vol. 348, no. 3, pp. 353–356 (In Russ.)
5. Baltybaev Sh. K., Levchenkov O. A., Glebovitsky V. A., Levskii L. K., Matukov D. I., Berezhnaya N. G. U-Pb dating of zircon from the Svecofennian plagiogranite intrusion, Baltic Shield: Specific features of the Upper and Lower intercepts. Doklady Akademii Nauk –Doklady Earth Sciences, 2005a, vol. 403, no. 5, pp. 750–753 (In Russ.)
6. Konopelko D., Eklund O. Timing and geochemistry of potassic magmatism in the eastern part of the Svecofennian domain, NW Ladoga Lake Region, Russian Karelia. Precambrian Research, 2003, vol. 120, pp. 37–53. DOI
7. Baltybaev Sh. K., Rizvanova N. G., Kuznecov A. B., Petrakova M. E., Vivdich Je. S. Late Orogenic Granitoids of the Tervu Agmatitic Zone in the Southeastern Part of the Svecofennian Belt (Northern Ladoga Area, Russia). Doklady Earth Sciences, 2023, vol. 511, no. 2, pp. 685–691. (In Russ.) DOI
8. Baltybaev Sh. K., Levchenkov O. A. Vulkanity v svekofennidah Priladozh'ja i rezul'taty U-Pb, Pb-Pb datirovanija porod raznogo genezisa kak osnova dlja korreljacii svekofennskih sobytij [Volcanics in svecofennides of the Ladoga region and results of U-Pb and Pb-Pb dating of rocks and minerals as a basis for correlation of Svecofennian events]. Stratigrafija Geologicheskaja korreljacija – Stratigraphy and Geological correlation, 2005b, vol. 13, no. 2, pp. 119–133 (In Russ.)
9. Baltybaev Sh. K., Glebovitsky V. A., Kozyreva I. V., Konopelko D. L., Levchenkov O. A., Sedova I. S., Shuldiner V. I. Geologiya i petrologiya svekofennid Priladozh'ya [Geology and petrology of svecofennids in the Ladoga area]. Saint-Petersburg, University Press publ., 2000, 200 p. (In. Russ.)
10. Baltybaev Sh. K., Sal'nikova E. B., Glebovickij V. A., Berezhnaja N. G., Jakovleva S. Z., Kovach V. P. Kuznechenskij massiv kalievyh porfirovidnyh granitov: rezul'taty U-Pb datirovanija i obosnovanie tektonicheskoj pozicii [The Kuznechensky massif of potassic porphyritic granites: results of U-Pb dating and substantiation of the tectonic position (Baltic shield)]. Doklady Akademii Nauk –Doklady Earth Sciences, 2004b, vol. 398, no. 7, pp. 1024–1028 (In Russ.)
11. Middlemost E. A. K. Naming materials in the magma/igneous rock system. Earth-Science Reviews, 1994, vol. 37, pp. 215– 224. DOI
12. Frost B. R., Barnes C. G., Collins W. J., Arculus R. J., Ellis D. J., Frost C. D. A geochemical classification for granitic rocks. Journal of Petrology, 2001, vol. 42, pp. 2033–2048. DOI
13. Laurent O., Martin H., Moyen J. F., Doucelance R. The diversity and evolution of late-Archean granitoids: evidence for the onset of ’modern-style’ plate tectonics between 3.0 and 2.5 Ga. Lithos, 2014, vol. 205, pp. 208–235. DOI
14. Ludwig K. R. PbDat 1.21 for MS-dos: a computer program for IBM-PC compatibles for processing raw Pb-U-Th isotope data. Version 1.07. U.S. Geological Survey. Open File Report, 1991. 35 p.
15. Ludwig K. R. Isoplot/Ex rev. 2.49. A geochronological toolkit for Microsoft Excel. Berkeley Geochronology Center, Special Publication, 2001, no. 1a. 55 p.
16. Currie K. L., Whalen J. B., Davis W. J., Longstaffe F. J., Cousens B. L. Geochemical evolution of peraluminous plutons in southern Nova Scotia, Canada–a pegmatite-poor suite. Lithos, 1998, vol. 44, pp. 117–140.
17. Skytta P., Manttari I. Structural setting of late Svecofennian granites and pegmatites in Uusimaa Belt, SWFinland: Age constraints and implications for crustal evolution. Precambrian Research, 2008, vol. 164, pp. 86–109. DOI
18. Thomas R., Davidson P. The missing link between granites and granitic pegmatites. Journal of Geosciences, 2013, vol. 58, pp. 183–200. DOI
19. Xiong Y.-Q., Jiang Sh.-Y., Wen Ch.-H., Yu H.-Y. Granite– pegmatite connection and mineralization age of the giant Renli Ta-Nb deposit in South China: constraints from U–Th–Pb geochronology of coltan, monazite, and zircon. Lithos, 2020, pp. 358–359. DOI
20. Egorov A. V., Arzamastsev A. A. Ta-Nb mineralizaciya v keramicheskih pegmatitah Severnogo Priladozh'ya: sostav i usloviya obrazovaniya [Ta-Nb mineralization of ceramic pegmatites of the Northern Ladoga Region: composition and formation conditions]. Trudy Fersmanovskoi nauchnoi sessii Geologicheskij institut Kol'skogo nauchnogo centra RAN – Proceedings of the Fersman Scientific Session of Geological Institute of Kola Scientific Centre of RAS, 2018, vol. 15, pp. 136–139. DOI
21. Rosing-Schow N., Andersen T., Müller A. Lead isotopes and the sources of granitic magmas: The Sveconorwegian granite and pegmatite province of Southern Norway. Minerals, 2022, vol. 12, no. 7, pp. 878. DOI
22. Ripp, G. S., Doroshkevich, A. G., Lastochkin, E. I., Izbrodin, I. A. Isotope and geochemical characteristics of rocks from the Oshurkovo apatite-bearing massif, Western Transbaikalia. Geochemistry International, 2014, vol. 52, no. 4, pp. 271–286. DOI
23. Nironen M., Elliott B. A., Rämö O. T. 1.88-1.87 Ga postkinematic intrusions of the Central Finland Granitoid Complex: a shift from C-type to A-type magmatism during lithospheric convergence. Lithos, 2000, vol. 53, pp. 37–58. DOI
Опубликован
2023-12-25
Как цитировать
Балтыбаев, Ш. К., Вивдич, Э. С., Лезжов, А. М., Петракова, М. Е., Ризванова, Н. Г., & Юрченко, А. В. (2023). О возрасте наиболее древних пегматитов свекофеннского блока в Северном Приладожье (ЮВ Фенноскандинавского щита). Вестник ВГУ. Серия: Геология, (4), 36-46. https://doi.org/10.17308/geology/1609-0691/2023/4/36-46
Раздел
Петрология, вулканология, геохимия
