Ages of the Ediacaran Volyn-Brest trap volcanism, glaciations, paleosols, Podillya Ediacaran soft-bodied organisms, and the Redkino-Kotlin boundary (East European Craton) constrained by zircon single grain U-Pb dating
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SRODON, Jan, CONDON, Daniel J., GOLUBKOVA, Elena Yu, MILLAR, Ian L., KUZMENKOVA, Oksana F., PASZKOWSKI, Mariusz, MAZUR, Stanisław, KEDZIOR, Artur, DRYGANT, Daniel, CIOBOTARU, Valerian, LIIVAMAGI, Sirle. Ages of the Ediacaran Volyn-Brest trap volcanism, glaciations, paleosols, Podillya Ediacaran soft-bodied organisms, and the Redkino-Kotlin boundary (East European Craton) constrained by zircon single grain U-Pb dating. In: Precambrian Research, 2023, nr. 386, p. 0. ISSN 0301-9268. DOI: https://doi.org/10.1016/j.precamres.2023.106962
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Precambrian Research
Numărul 386 / 2023 / ISSN 0301-9268

Ages of the Ediacaran Volyn-Brest trap volcanism, glaciations, paleosols, Podillya Ediacaran soft-bodied organisms, and the Redkino-Kotlin boundary (East European Craton) constrained by zircon single grain U-Pb dating

DOI:https://doi.org/10.1016/j.precamres.2023.106962

Pag. 0-0

Srodon Jan1, Condon Daniel J.2, Golubkova Elena Yu3, Millar Ian L.2, Kuzmenkova Oksana F.4, Paszkowski Mariusz1, Mazur Stanisław1, Kedzior Artur1, Drygant Daniel5, Ciobotaru Valerian6, Liivamagi Sirle17
 
1 Institute of Geological Sciences, Polish Academy of Sciences, Warsaw,
2 British Geological Survey, Nottingham,
3 Institute of Precambrian Geology and Geochronology RAS,
4 Research and Production Center for Geology, Minsk,
5 Hungarian Natural History Museum,
6 Institutul de Geologie şi Seismologie,
7 Geological Survey of Estonia, Rakvere
 
 
Disponibil în IBN: 27 ianuarie 2023


Rezumat

Combined single zircon crystal CA-ID-TIMS U-Pb dating, micropaleontological study, and quantitative XRD analysis were used to correlate sections of the Podillya-Moldova Ediacaran succession with sections of the Volyn Large Igneous Province (Volyn LIP). Five U-Pb zircon ages were obtained from Volyn LIP rocks, and four from three distinct Podillya bentonite horizons. Biostratigraphic determinations were made for one section in Volyn, and two sections in Podillya. It was concluded that Volyn LIP activity had two phases. A first phase of mafic and felsic magmatism was characterized by eruption of numerous basalt lava flows, and lasted from c. 580 to 567 Ma; a second phase of pyroclastic felsic magmatism, with no lavas, lasted from 567 to c. 545 Ma. The two phases can be distinguished in the quantitative mineral composition of rocks from the Kobryn 1K borehole in western Belarus. In the central area of the Volyn LIP, near Brest, rocks of the felsic phase were removed by erosion before deposition of the Kotlin subgroup. The Podillya Ediacaran succession, from the top of the Hrushka formation to the top of the Kalyus beds, (i.e. the Mohyliv-Podilsky group), hosts soft-bodied organisms. This succession corresponds to the felsic phase of the Volyn LIP. The age of the Redkino-Kotlin subgroup biostratigraphic boundary, at the base of the Nagoryany formation, is constrained at 555–545 Ma, close to the end of the Volyn LIP activity. The newly discovered glaciation in Volyn is dated as c. 567 Ma. The period of development of kaolinitic paleosols on top of the Volyn LIP effusive rocks is dated at c. 570–550 Ma.

Cuvinte-cheie
Baltica, biostratigraphy, Microfossils, vendian, Volyn Large Igneous Province