L. Shumlyanskyy 1, R. Ernst 2, K. Billström 3
1 – M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the National Academy of Sciences of Ukraine
2 – Dept. Earth Sci., Carleton U., Ottawa, Canada & Ernst Geosciences
3 – Laboratory for Isotope Geology, Swedish Museum of Natural History, SE-10405 Stockholm, Sweden
Language: English
Geochemistry and ore formation 2015, 35: 37–42
https://doi.org/10.15407/gof.2015.35.037
An age is provided for the Davydky massif, one of the intrusive bodies within the Korosten AMCG complex in the Ukrainian shield. The unexpected 1790 ± 1 Ma U-Pb baddeleyite age obtained for the Davydky massif (concentrically zoned gabbro to syenite) provides additional support for the simultaneous emplacement of the early phase of the Korosten AMCG complex and regional Ni-enriched tholeiitic magmas. The petrologic relationships of these two simultaneously emplaced magma types are discussed.
Key words: Davydky massif, Korosten complex, Ukrainian shield, Palaeoproterozoic, U-Pb age.
References
1. Amelin Y.V., Heaman L.M., Verchogliad V.M., Skobelev V.M. Geochronological constraints on the emplacement history of an anorthosite-rapakivi granite suite: U-Pb zircon and baddeleyite study of the Korosten complex, Ukraine. Contributions to Mineralogy and Petrology. 1994, 116, pp. 411-419. https://doi.org/10.1007/BF00310908
2. Bogdanova S.V., Gintov O.B., Kurlovich D., Lubnina N.V., Nilsson M., Orlyuk M.L., Pashkevich I.K., Shumlyanskyy L.V.,Starostenko V.I. Late Palaeoproterozoic mafic dyking in the Ukrainian Shield (Volgo-Sarmatia) caused by rotations during the assembly of supercontinent Columbia. Lithos., 2013, 174,pp. 196-216. https://doi.org/10.1016/j.lithos.2012.11.002
3. Duchesne J.C., Shumlyanskyy L., Charlier B. The Fedorivka layered intrusion (Korosten Pluton, Ukraine): an example of highly differentiated ferrobasaltic evolution. Ibid., 2006, 89, pp. 353-376. https://doi.org/10.1016/j.lithos.2006.01.003
4. Kryvdik S.G., Tkachuk V.I. Petrology of alkaline rocks of the Ukrainian shield. Kyiv: Naukova dumka,1990, 408 p. (In Russian).
5. Mitrokhin O.V. The gabbro-anorthosite massifs of the Korosten pluton (Ukraine) and problems of parental magmas evolution. Abstract volume of the GEODE field workshop 8-12th July 2001 on ilmenite deposits in the Rogaland anorthosite province, S. Norway. NGU Report 2001.042. 2001, pp. 86-90.
6. Scherbak N.P., Artemenko G.V., Bartnitsky E.N. Geochronological chart of the Precambrian of the Ukrainian shield. Kyiv: Naukova dumka, 1989, 144 p. (In Russian).
7. Shumlyanskyy L., Billström K., Hawkesworth C., Elming S.-E. U-Pb age and Hf isotope compositions of zircons from the north-western region of the Ukrainian shield: mantle melting in response to post-collision extension. Terra Nova. 2012, 24, pp. 373-379. https://doi.org/10.1111/j.1365-3121.2012.01075.x
8. Shumlyanskyy L.V., Mazur M.D. Age and composition of jotunites of the Bilokorovychi dyke swarm. Geologist of Ukraine. 2010, Iss. 1-2, pp. 70-78. (In Ukraine).
9. Verhogliad V.M. Age stages of the Korosten pluton magmatism. Geochemistry and ore formation. 1995, 21, pp. 34-47 (in Russian)