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Soldatenko Y, El Albani A, Ruzina M, Fontaine C, Nesterovsky V, Paquette JL, Meunier A, Ovtcharova M. Precise U-Pb age constrains on the Ediacaran biota in Podolia, East European Platform, Ukraine. Sci Rep 2019; 9:1675. [PMID: 30737449 PMCID: PMC6368556 DOI: 10.1038/s41598-018-38448-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 12/19/2018] [Indexed: 11/26/2022] Open
Abstract
The Neoproterozoic Era was characterized by rapidly changing paleogeography, global climate changes and especially by the rise and fall of the Ediacaran macro-biota. The correlation between disparate Ediacaran fossil-bearing localities and the tentative reconstruction of their paleoenvironmental and paleogeographic contexts are usually complicated by the lack of precise and accurate age data. For this reason, Neoproterozoic sedimentary sections associating Ediacaran biota fossils and fresh volcanic material are especially valuable for radioisotopic dating. Our research in the Podolya Basin, southwestern Ukraine, revealed the presence of four Neoproterozoic volcanic ash deposits (potassium-bentonite layers) within Ediacaran fossil-bearing siliciclastic rocks of the Mohyliv-Podilskyi Group. We used zircon U-Pb LA-ICPMS and CA-ID-TIMS methods to date two of those layers. The results indicate that a diverse assemblage of body and trace Ediacaran fossils occurred as early as 556.78 ± 0.18 million years (Ma) ago. By combining morphological evidence and new age determinations, we suggest a closer paleobiogeographical relationship between the Ukrainian Ediacaran assemblage and the Avalon paleocontinent than previously estimated.
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Affiliation(s)
- Y Soldatenko
- Université de Poitiers, Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS UMR 7285, 86073, Poitiers, France.,Department of Geological Prospection, National Mining University of Ukraine, 49005, Dnipro, Ukraine
| | - A El Albani
- Université de Poitiers, Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS UMR 7285, 86073, Poitiers, France.
| | - M Ruzina
- Department of Geological Prospection, National Mining University of Ukraine, 49005, Dnipro, Ukraine
| | - C Fontaine
- Université de Poitiers, Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS UMR 7285, 86073, Poitiers, France
| | - V Nesterovsky
- Department of Geology, National Kiev University of Taras Shevschenko, Kyiv, Ukraine
| | - J-L Paquette
- Laboratoire Magmas et Volcans, Université Clermont-Auvergne-CNRS-IRD-OPGC, 63000, Clermont-Ferrand, France
| | - A Meunier
- Université de Poitiers, Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS UMR 7285, 86073, Poitiers, France
| | - M Ovtcharova
- Department of Earth Sciences, University of Geneva, 13 rue des Maraîchers, 1205, Geneve, Switzerland
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