The age of the Paleoproterozoic Dubravinsky suprasubduction alkali-carbonatite complex syenites, Kursk block, Sarmatia
DOI:
https://doi.org/10.17308/geology/1609-0691/2024/1/4-13Keywords:
Kursk block, geochronology, carbonatiteAbstract
Introduction: The paper is intended to reconsider the age of Dubravinsky alkali-carbonatite complex (Kursk block, Sarmatia) syenites according to the zircon and titanite U-Pb dating and Sm-Nd-Sr isotopic geochemical data in order to revise the geodynamical model of its forming.
Methodology: We carried out the isotopic dating of the Dubravinsky alkali-carbonatite complex syenites by zircon (SIMS) and titanite (ID TIMS), and also the Sm-Nd-Sr isotopic systematics.
Results and discussion: The age of zircon from syenites is ca. 2.59 Ga and previously was wrongly interpreted as the crystallization age. However, Sm-Nd-Sr isotopic data revealed this age being older than the age of syenites intrusion and so the zircon is captured. According to the titanite dating, the syenites crystallization age is 2.07–2.08 Ga, hence the geodynamical model of their forming needs to be revised.
Conclusion: Dubravinsky alkali-carbonatite complex aged 2.07–2.08 Ga has been formed in the suprasubductional environment.
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Savko K. A., Tsybulyaev S. V., Samsonov A. V., Bazikov N. S., Korish E. Kh., Terentiev R. A., Panevin V. V. Archean carbonatites and alkaline rocks of the Kursk block, Sarmatia: age and geodynamic setting. DAN ‒ Doklady Earth Sciences. 2021, vol. 498, part 1, pp. 412–417. DOI: 10.1134/S1028334X21050160
Albekov A. Y., Chernyshov N.M., Ryborak M. V., Kuznet¬sov V. S., Salnikova E. B., Kholin V. M. U-Pb isotopic age of apatite-bearing carbonatites in the Kursk block, Voronezh crystalline massif (central Russia). DAN ‒ Doklady Earth Sciences. 2017, vol. 473, pp. 271–272. DOI: 10.1134/S1028334X17030205
Savko K. A., Samsonov A. V., Kotov A. B., Sal’nikova E. B., Korish E. H., Larionov A. N., Anisimova I. V., Bazikov N. S. The early Precambrian metamorphic events in Eastern Sarmatia. Precambrian Res., 2018, vol. 311, pp. 1–23. DOI: 10.1016/j.precamres.2018.04.009
Bogdanova S., Gorbatschev R., Grad M., Guterch A., Janik T., Kozlovskaya E., Motuza G., Skridlaite G., Starostenko V., Taran L. EUROBRIDGE: new insight into the geodynamic evolution of the East European Craton. European Lithosphere Dynamics. Eds.: Gee, D.G., Stephenson, R.A. Geol. Soc. London Mem., 2006, vol. 32, pp. 599–628. DOI: 10.1144/GSL.MEM.2006.032.01.36
Savko K. A., Samsonov A. V., Larionov A. N., Chervyakovs¬kaya M. V., Korish E. H., Larionova Yu. O., Bazikov N. S., Tsybulyaev S. V. A buried Paleoarchean core of the Eastern Sarmatia, Kursk block: U-Pb, Lu-Hf and Sm-Nd isotope mapping and paleotectonic application. Precambrian Research, 2021, vol. 353. 106021. DOI: 10.1016/j.precamres.2020.106021
Savko K. A., Samsonov A. V., Kholina N. V., Larionov A. N., Zaitseva M. V., Korish E. H., Bazikov N. S., Terentiev R. A. 2.6 Ga high-Si rhyolites and granites in the Kursk Domain, Eastern Sarmatia: Petrology and application for the Archaean palaeocontinental correlations. Precambrian Research, 2019, vol. 322, pp. 170–192. DOI: 10.1016/j.precamres.2019.01.006
Larionov A. N., Andreichev V. A., Gee D.G. The Vendian alkaline igneous suite of northern Timan: ion microprobe U–Pb zircon ages of gabbros and syenite. The Neoproterozoic Timanide Orogen of Eastern Baltica. Еds. Gee D.G., Pease V.L. London, Geol. Soc. London Mem., 2004, vol. 30, pp. 69–74. DOI: 10.1144/gsl.mem.2004.030.01.07
Ludwig K. R. User’s Manual for ISOPLOT/Ex. 3.22. A geochronological toolkit for Microsoft Excel. Berkeley Geochronology Center Special Publication. http://www.bgc.org/klprog¬rammenu.html
Savko K. A., Samsonov A. V., Salnikova E. B., Stifeeva M. V., Kuznetsov A. B., Kotov A. B., Larionova Yu. O., Korish E. H., Larionov A. N., Chervyakovskaya M. V., Tsybulyaev S. V., Bazikov N. S. Paleoproterozoic alkaline-carbonatite magmatism in the convergent tectonic setting: evidences from 2.07 Ga Dubravinsky complex in the Eastern Sarmatia. Precambrian Research., 2023, vol. 395, 107153. DOI: 10.1016/j.pre¬camres.2023.107153
Goldstein S. J., Jacobsen S. B. Nd and Sr isotopic systematics of river water suspended material: implications for crustal evolution. Earth. Planet. Sci. Lett., 1988, vol. 87, pp. 249–265. DOI: 10.1016/0012-821X(88)90013-1
Savko K. A., Kal'muckaja N. Ju. Petrologija nedosyshhennyh kaliem metapelitov Voronezhskogo kristallicheskogo massiva s rassmotreniem paragenezisa olivin-zhedrit-ortopiroksen-granat magnetit [Petrology of potassium-poor metapelites of the Voronezh Crystalline Massif with reference to the olivine-gedrite-orthopyroxene-garnet-magentite assemblage]. Petrologija ‒ Petrology, 2002, vol. 10, no. 3, pp. 249–276 (In Russ.)
Savko K. A., Samsonov A. V., Bazikov N. S., Kozlova E. N. Paleoproterozoiskie granitoidy Tim-Yastrebovskoi struktury Voronezhskogo kristallicheskogo massiva: geokhimiya, geo¬khronologiya i istochniki rasplavov [Palaeoproterozic granitoids of the Tim-Yastrebovskaya structure, Voronezh Crystalline Massif: Geochemistry, geochronology, and melt sources]. Vestnik Voronezhskogo gosudarstvennogo universiteta. Serija: Geologija ‒ Proceedings of Voronezh State University. Series: Geology, 2014, no. 2, pp. 56–78 (In Russ.)
Korish E. Kh., Savko K. A., Sal'nikova E. B., Samsonov A. V., Ivanova A. A., Larionov A. N., Tsybulyaev S. V. Paleo-proterozoiskii diorit-granodioritovyi magmatizm Kurskogo bloka Sarmatii: rasshifrovka sblizhennykh vo vremeni geologicheskikh sobytii [Paleoproterozoic diorite-granodiorite magmatism of the Kursk block of Sarmatia: decoding of geological events close in time]. Trudy Karel'skogo nauchnogo tsentra RAN ‒ Proccedings of the Karelian Scientific Center of RAS, 2022, no. 5, pp. 60–63. DOI: 10.17076/geo1655
Rukhlov A. S., Bell K. Geochronology of carbonatites from the Canadian and Baltic Shields, and the Canadian Cordillera: clues to mantle evolution. Miner. Petrol., 2010, vol. 98, pp. 11–54. DOI: 10.1007/s00710-009-0054-5
Shumlyanskyy L. V., Dubyna O. V., Kryvdik S. G. New Paleoproterozoic U-Pb ages for mafic-ultramafic and alkaline intrusions in the Ukrainian Shield. Developing the full potential of the large igneous province (LIP) record for multi-commodity, multi-scale exploration targeting. Toronto, Ontario, Canada. 2021.
Terentiev R. A., Savko K. A., Santosh M. Paleoproterozoic evolution of the arc–back-arc system in the East Sarmatian Orogen (East European Craton): zircon SHRIMP geochronology and geochemistry of the Losevo volcanic suite. Amer. J. Sci., 2017, vol. 317, pp. 707–753. DOI: 10.2475/06.2017.03
Tsybulyaev S. V., Savko K. A., Korish E. H., Samsonov A. V. Paleoproterozoic OIB- and MORB-type rift volcanics of the Kursk block, Eastern Sarmatia: petrology and geodynamics. Petrology, 2021, vol. 29, no. 2, pp. 114–147. DOI: 10.1134/S08695911210200
