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Structural Reconstruction of the Middle Uralian Part of the Uralian Orogen at the Initial Stage of Its Formation: Evidence from Clay Geochemistry

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Abstract

The Uralian foredeep is a classical marginal structure located on the foreland of the Late Paleozoic Uralian Orogen. It is subdivided into several depressions/sedimentation basins. This paper presents the analysis of the REE and Th distribution in the Middle Carboniferous and Lower Permian clay rocks of the Yuryuzan–Sylva Depression. This structure, like other depressions of the foredeep, is made up of diverse associations of the first sedimentation cycle clastic and clay rocks, which were formed during the orogen erosion. In the (La/Yb)N–Eu/Eu* and (La/Yb)N–Th diagrams, individual and average data points are confined to the field of bottom sediments of mouths of modern rivers draining volcanic provinces. This likely suggests a homogeneous composition of orogen provenance in the Carboniferous and Early Permian.

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Notes

  1. Arguments in support of the last assumption are given in (Maslov, 2019).

  2. In this paper, we follow stratigraphic units accepted by the 4th Uralian Stratigraphic Conference (Chuvashov et al., 1990; Stratigraphic …, 1993), which served as the basis for medium-scale geological maps used for sampling of the Upper Paleozoic Yuryuzan–Sylva depression.

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ACKNOWLEDGMENTS

We are grateful to N.S. Glushkova for the preparation of figures for this manuscript.

Funding

The studies were performed in the framework of the State Task of the Institute of Geology and Geochemistry of the Ural Branch of the Russian Academy of Sciences (project no. АААА-А18-118053090044-1).

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Authors and Affiliations

  1. Zavaritsky Institute of Geology and Geochemistry, Urals Branch, Russian Academy of Sciences, 620016, Yekaterinburg, Russia

    A. V. Maslov, G. A. Mizens, L. V. Badida & M. T. Krupenin

  2. Geological institute, Russian Academy of Sciences, 119017, Moscow, Russia

    A. V. Maslov

Authors
  1. A. V. Maslov
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  2. G. A. Mizens
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  3. L. V. Badida
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  4. M. T. Krupenin
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Corresponding authors

Correspondence to A. V. Maslov, G. A. Mizens, L. V. Badida or M. T. Krupenin.

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Translated by M. Bogina

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Maslov, A.V., Mizens, G.A., Badida, L.V. et al. Structural Reconstruction of the Middle Uralian Part of the Uralian Orogen at the Initial Stage of Its Formation: Evidence from Clay Geochemistry. Geochem. Int. 59, 522–527 (2021). https://doi.org/10.1134/S0016702921050049

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  • DOI: https://doi.org/10.1134/S0016702921050049

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