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Baeronovka Formation

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Journal Article
Published: 01 May 2025
Russ. Geol. Geophys. (2025) 66 (5): 511–529.
... Formation in the southwest and the Tushama and Kata formations at the center of the Siberian Platform. The geochemical characteristics and results of analysis of minerals of the heavy fraction from the Baeronovka Formation indicate a predominantly felsic composition of the provenance rocks. The latter...
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Histograms and relative probability age curves for detrital zircons from the sandstones of the Tushama, Kata, and Baeronovka formations: a – sample 2165, Tushama Formation, n = 92; b – sample 2180, Kata Formation, n = 86; c – sample 1826, Baeronovka Formation, n = 107 [Gladkochub et al., 2020].
Published: 01 May 2025
Fig. 7. Histograms and relative probability age curves for detrital zircons from the sandstones of the Tushama, Kata, and Baeronovka formations: a – sample 2165, Tushama Formation, n = 92; b – sample 2180, Kata Formation, n = 86; c – sample 1826, Baeronovka Formation, n = 107
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Schematic geologic structure of the Siberian Platform cover in the area of the Chunskii Village, modified from Gladkochub et al. [2020]. 1 – Quaternary deposits; Formations: 2 – Cheremkhovo (J1); 3 – Toporog (C1); 4 – Baeronovka (C1); 5 – Kezhem (S1); 6 – Bratsk (O3); 7 – Badaranovka (O2); 8 – mafic igneous rocks of the Korshunovo Complex (T1); 9 – locality of sampling from the Baeronovka Formation deposits.
Published: 01 May 2025
Fig. 2. Schematic geologic structure of the Siberian Platform cover in the area of the Chunskii Village, modified from Gladkochub et al. [2020 ]. 1 – Quaternary deposits; Formations: 2 – Cheremkhovo (J 1 ); 3 – Toporog (C 1 ); 4 – Baeronovka (C 1 ); 5 – Kezhem (S 1 ); 6 – Bratsk (O 3
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PCS-normalized [Condie, 1993] and chondrite-normalized [Boynton, 1984] trace element and REE patterns of the sandstones of: a, b – Baeronovka Formation; c, d – Tushama Formation; e, f – Kata Formation. Designations follow Fig. 5.
Published: 01 May 2025
Fig. 6. PCS-normalized [ Condie, 1993 ] and chondrite-normalized [ Boynton, 1984 ] trace element and REE patterns of the sandstones of: a , b – Baeronovka Formation; c , d – Tushama Formation; e , f – Kata Formation. Designations follow Fig. 5 .
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A (Al/Si (at. quant.)) – B (Fe2+ + Fe3+ + Mn + Ca + Mg (at. quant.)) classification diagram [Neelov, 1980] for the studied sandstones of: 1 – Baeronovka Formation, 2 – Tushama Formation, 3 – Kata Formation. Composition fields: I – monomict (quartz) sandstone; IIb – carbonate (ferruginous) sandstone; IIIa-1 – arkosic and subarkosic sandstone; IIIa-2 – polymict sandstone; IIIb – carbonate and ferruginous polymict sandstone; IIIc – carbonate and carbonate–ferruginous sandstone; IIIf – carbonatolite with an impurity of sand and tuff material; IVa – polymict siltstone.
Published: 01 May 2025
Fig. 5. A (Al/Si (at. quant.)) – B (Fe 2+ + Fe 3+ + Mn + Ca + Mg (at. quant.)) classification diagram [ Neelov, 1980 ] for the studied sandstones of: 1 – Baeronovka Formation, 2 – Tushama Formation, 3 – Kata Formation. Composition fields: I – monomict (quartz) sandstone; IIb
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Photomicrographs of thin sections of quartz sandstone (a – nicols ||; b – nicols ×), calcareous silty sandstone (c – nicols ||; d – nicols ×), and ferruginous sandstone (e – nicols ||; f – nicols ×) from the Baeronovka Formation, polymict sandstone from the Tushama Formation (g – nicols ||; h – nicols ×), and polymict sandstone from the Kata Formation (i – nicols ||; j – nicols ×). Qz – quartz; Fsp – feldspar; Pl – plagioclase; 1–7 – rock fragments: 1 – granitoids 2 – siliceous rocks 3 – mudstones 4 – limestones, 5 – siltstone, 6 – mafic effusive rock, 7 – microshale.
Published: 01 May 2025
Fig. 4. Photomicrographs of thin sections of quartz sandstone ( a – nicols ||; b – nicols ×), calcareous silty sandstone ( c – nicols ||; d – nicols ×), and ferruginous sandstone ( e – nicols ||; f – nicols ×) from the Baeronovka Formation, polymict sandstone from the Tushama Formation
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Th/Sc–Zr/Sc [McLennan et al., 1993], Ti/Zr–La/Sc [Bhatia and Crook, 1986], and La/Th–Hf [Floyd and Leveridge, 1987] diagrams for the sandstones of the Baeronovka, Tushama, and Kata formations. Designations follow Fig. 5. Dash-dotted lines show the composition trend of the provenance rocks and the recycling trend; solid lines mark the composition fields of various igneous rocks; and dashed lines show the directions of the increase in the content of ancient sedimentary component and mixing of the compositions of the provenance rocks.
Published: 01 May 2025
Fig. 8. Th/Sc–Zr/Sc [ McLennan et al., 1993 ], Ti/Zr–La/Sc [ Bhatia and Crook, 1986 ], and La/Th–Hf [ Floyd and Leveridge, 1987 ] diagrams for the sandstones of the Baeronovka, Tushama, and Kata formations. Designations follow Fig. 5 . Dash-dotted lines show the composition trend