AGE OF THE AMNUNAKTA MONZOGABBRO-MONZODIORITE MASSIF IN THE SOUTHERN FRAMING OF THE SIBERIAN CRATON
https://doi.org/10.5800/GT-2020-11-2-0475
Abstract
The first geochronological data have been obtained for Amnunakta massif composed of monzogabbro-monzodiorite and located in the southeastern part of the Selenga-Stanovoy superterrane. It was found that the age of Amnunakta massif (240 ± 1 Ma) is almost similar to that of quartz porphyry of the Kuitun formation and alkaline granites of the Nerchugan complex, which were sampled from the eastern flank of the Selenga-Vitim Volcano-Plutonic belt. Taking into account the geological position and geochemical features of the Amnunakta massif, there are grounds to suggest that the formation of this massif (as well as of quartz porphyry of the Kuitun formation and alkaline granites of the Nerchugan complex) was associated with one of the impulses of bimodal intraplate magmatism during the evolution of the Selenga-Vitim belt.
About the Authors
I. V. Buchko
Institute of Geology and Nature Management, Far Eastern Branch of RAS
Russian Federation
INNA V. BUCHKO
Doctor of Geological and Mineralogical Sciences, Leading Researcher
1 Relochniy Ln, Blagoveschensk 675000
Russian Federation
INNA V. BUCHKO
Doctor of Geological and Mineralogical Sciences, Leading Researcher
1 Relochniy Ln, Blagoveschensk 675000
A. A. Rodionov
Institute of Geology and Nature Management, Far Eastern Branch of RAS
Russian Federation
ALEXEY A. RODIONOV
Junior Researcher
1 Relochniy Ln, Blagoveschensk 675000
Russian Federation
ALEXEY A. RODIONOV
Junior Researcher
1 Relochniy Ln, Blagoveschensk 675000
E. B. Salnikova
Institute of Precambrian Geology and Geochronology of RAS
Russian Federation
EKATERINA B. SALNIKOVA
Candidate of Geological and Mineralogical Sciences, Leading Researcher
2 Makarova Emb, Saint Petersburg 199034
Russian Federation
EKATERINA B. SALNIKOVA
Candidate of Geological and Mineralogical Sciences, Leading Researcher
2 Makarova Emb, Saint Petersburg 199034
References
1. Buchko I.V., Sal’nikova E.B., Kotov A.B., Sorokin A.P., Larin A.M., Velikoslavinskii S.D., Yakovleva S.Z., Plotkina Yu.V., 2008a. Age and Tectonic Position of the Khorogochi GabbroAnorthosite Massif (Dzhugdzhur-Stanovoi Superterrane). Doklady Earth Sciences 423 (1), 1312–1315. https://doi.org/10.1134/S1028334X08080291.
2. Buchko I.V., Sorokin A.A., Kotov A.B., Samsonov A.V., Larionova Yu.O., Ponomarchuk V.A., Larin A.M., 2018. The Age and Tectonic Setting of the Lukinda Dunite-Gabbro-Anorthosite Massif in the East of the Selenga-Stanovoi Superterrane, Central Asian Fold Belt. Russian Geology and Geophysics 59 (7), 709–717. https://doi.org/10.1016/j.rgg.2018.07.001.
3. Buchko I.V., Sorokin A.A., Sal’nikova E.B., Kotov A.B., Larin A.M., Izokh A.E., Velikoslavinsky S.D., Yakovleva S.Z., 2007. The Late Jurassic Age and Geochemistry of Ultramafic-Mafic Massifs of the Selenga-Stanovoy Superterrane (Southern Framing of the North Asian Craton). Russian Geology and Geophysics 48 (12), 1026–1036. https://doi.org/10.1016/j.rgg.2007.11.005.
4. Buchko I.V., Sorokin A.A., Sal’nikova E.B., Kotov A.B., Velikoslavinskii S.D., Larin A.M., Izokh A.E., Yakovleva S.Z., 2010. The Triassic Stage of Mafic Magmatism in the Dzhugdzhur– Stanovoi Superterrane (Southern Framing of the North Asian Craton). Russian Geology and Geophysics 51 (11), 1157– 1166. https://doi.org/10.1016/j.rgg.2010.10.001.
5. Buchko I.V., Sorokin A.A., Sorokin A.P., Sal’nikova E.B., Kotov A.B., Larin A.M., Velikoslavinskii S.D., Yakovleva S.Z., 2008b. Age and Tectonic Setting of the Kengurak-Sergachi Gabbro-Anorthosite Massif (the Selenga-Stanovoi Superterrane, Southern Frame of the Siberian Craton). Stratigraphy and Geological Correlation 16 (4), 349–359. https://doi.org/10.1134/S0869593808040011.
6. Larin A.M., Kotov A.B., Sal’nikova E.B., Glebovitskii V. A., Sukhanov M.K., Yakovleva S.Z., Kovach V.P., Berezhnaya N.G., Velikoslavinskii S. D., Tolkachev M. D., 2006. The Kalar Complex, Aldan-Stanovoi Shield, an Ancient Anorthosite-Mangerite-Charnockite-Granite Association: Geochronologic, Geochemical, and Isotopic-Geochemical Characteristics. Petrology 14 (1), 2–20. https://doi.org/10.1134/S0869591106010024.
7. Larin A.M., Kotov A.B., Sal’nikova E.B., Kovach V.P., Sergeeva N.A., Yakovleva S.Z., 2001. Mesozoic Granites of the Chubachi Massif of the Tukuringra Complex (Dzhugdzhur-Stanovoy Folded Area): New Geochemical, Geochronological and Isotope-Geochemical Data. Petrology 9 (4), 417–432 (in Russian) [Ларин A.M., Котов А.Б., Сальникова Е.Б., Ковач В.П., Сергеева Н.А., Яковлева С.З. Мезозойские граниты Чубачинского массива тукурингрского комплекса (Джугджуро-Становая складчатая область): новые геохимические, геохронологические и изотопно-геохимические данные // Петрология. 2001. Т. 9. № 4. С. 417–432].
8. Larin A.M., Kotov A.B., Sal’nikova E.B., Sorokin A.A., Sorokin A.P., Korshunov A.M., Velikoslavinskii S.D., Yakovleva S.Z., Plotkina Yu.V., 2011. Age and Tectonic Position of Granites and Volcanics in the Eastern Margin of the Selenga-Vitim Volcano-Plutonic Belt. Doklady Earth Sciences 441 (1), 1502–1507. https://doi.org/10.1134/S1028334X11110262.
9. Ludwig K.R., 1991. PbDat for MS-DOS. Version 1.21. U.S. Geological Survey Open-File Report 88–542, 34 p.
10. Ludwig K.R., 1999. ISOPLOT/Ex. Version 2.06. A Geochronological Toolkit for Microsoft Excel. Berkley Geochronology Center Special Publication, No 1a, 49 p.
11. Milay T.A., 1964. A Geological Map and a Map of Minerals of the USSR. Stanova Series. Scale of 1:200000. Sheet N-51-X. VSEGEI, Leningrad (in Russian) [Милай Т.А. Геологическая карта и карта полезных ископаемых СССР. Серия Становая. Масштаб 1:200000. Лист N-51-Х. Л.: ВСЕГЕИ, 1964].
12. Neymark L.A., Larin A.M., Ovchinnikova G.V., Yakovleva S.Z., 1992. Uranium-Lead Age of Dzhugdzhur Anorthosites. Reports of the Academy of Sciences 323 (3), p. 514–518 (in Russian) [Неймарк Л.А., Ларин А.М., Овчинникова Г.В., Яковлева С.З. Уран-свинцовый возраст анортозитов Джугджура//ДАН. 1992. Т. 323. № 3. С. 514–518].
13. Polyakov G.V., Izokh A.E., Krivenko A.P., 2006. PlatinumBearing Ultramafic-Mafic Formations of Mobile Zones in Central and Southeast Asia. Geology and Geophysics 47 (12), 1227–1241 (in Russian) [Поляков Г.В., Изох А.Э., Кривенко А.П. Платиноносные ультрамафит-мафитовые формации подвижных поясов Центральной и Юго-Восточной Азии // Геология и геофизика. 2006. Т.47. № 12. С. 1227–1241].
14. Stacey J.S., Kramers I.D., 1975. Approximation of Terrestrial Lead Isotope Evolution by a Two-Stage Model. Earth and Planetary Science Letters 26 (2), 207–221. https://doi.org/10.1016/0012-821X(75)90088-6.
15. Steiger R.H., Jager E., 1976. Subcommission on Geochronology: Convention on the Use of Decay Constants in Geoand Cosmochronology. Earth and Planetary Science Letters 36 (2), 359–362. https://doi.org/10.1016/0012-821X(77)90060-7.
Review
For citations:
Buchko I.V., Rodionov A.A., Salnikova E.B. AGE OF THE AMNUNAKTA MONZOGABBRO-MONZODIORITE MASSIF IN THE SOUTHERN FRAMING OF THE SIBERIAN CRATON. Geodynamics & Tectonophysics. 2020;11(2):296-301. (In Russ.) https://doi.org/10.5800/GT-2020-11-2-0475
Views:
718
Email this article 