KFU. Card publication. Paleosols and host rocks from the Middle–Upper Permian reference section of the Kazan Volga region, Russia: A case study

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PALEOSOLS AND HOST ROCKS FROM THE MIDDLE&NDASH;UPPER PERMIAN REFERENCE SECTION OF THE KAZAN VOLGA REGION, RUSSIA: A CASE STUDY

Form of presentation

Articles in international journals and collections

Year of publication

2020

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Authors, employees of KFU

Arefev Mikhail Pavlovich, author

Eskin Aleksey Aleksandrovich, author

Kropotova Tatyana Vladimirovna, author

Muravev Fedor Aleksandrovich, author

Silantev Vladimir Vladimirovich, author

Bibliographic description in the original language

Mouraviev, F.A., Arefiev, M.P., Silantiev, V.V., Eskin A.A., Kropotova, T.V. Paleosols and host rocks from the Middle–Upper Permian reference section of the Kazan Volga region, Russia: A case study. Palaeoworld 29 (2020), pp. 405-425, https://doi.org/10.1016/j.palwor.2019.05.004

Annotation

The Urzhumian (Wordian) and Severodvinian (Capitanian) reference section of the Monastery Ravine (Kazan Volga region, Russia), containstwo siltstone lithofacies: (a) laminated and (b) massive. Depositional settings of the laminated siltstones can be interpreted as perennial to ephemerallakes; depositional settings of the massive siltstones are interpreted as floodplains with soil cover and periodical silt influx in wet seasons. The bulkgeochemistry of siliciclastics has revealed a high degree of weathering of both types of siltstone. The similar chemical composition, mineralogy,and grain size suggest the same provenance of silt material. Geochemical data indicate eastern source rocks, which are the Permian red beds of theCis-Ural plains.The main genetic types of paleosols hosted in the massive siltstones in the studied section, include moderately developed Vertisols and Calcisolswith drab-colored root traces, calcareous nodules, low chroma mottles, angular blocky peds and slickensides. These pedofeatures indicate in generala semi-arid climate with clear seasonality of rainfall. Major oxides of the paleosol matrix were used to estimate paleoprecipitation through the basesto alumina ( Bases/Al) ratio and chemical index of alteration minus potassium (CIA-K) proxies. Estimates from Urzhumian paleosols indicaterelatively low mean annual precipitation (MAP) of 390 mm/yr. The transition to the Severodvinian paleosols is marked by a noticeable MAPincrease up to 777 mm/yr. This climate moistening coincides with changes in the morphology of paleosols from dolomitic with low redoximorphyto calcitic with gley horizons. The pedogenic carbonate nodules consisting of dolomicrite (5–10 m) are very common in the Urzhumian paleosolsand their morphology, micromorhology and isotopic features indicate the pedogenic origin of dolomite.Sedimentological and paleopedological features of the studied siltstones, as well as the location of the Volga-Ural basin in a mid-latitude position(25–32◦N) indicate a monsoonal character of precipitation during the Middle Permian.

Keywords

Permian, Urzhumian, Severodvinian, Siltstone, Paleosol, Dolomite

The name of the journal

Palaeoworld

URL

https://doi.org/10.1016/j.palwor.2019.05.004

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=203524&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Arefev Mikhail Pavlovich	ru_RU
dc.contributor.author	Eskin Aleksey Aleksandrovich	ru_RU
dc.contributor.author	Kropotova Tatyana Vladimirovna	ru_RU
dc.contributor.author	Muravev Fedor Aleksandrovich	ru_RU
dc.contributor.author	Silantev Vladimir Vladimirovich	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Mouraviev, F.A., Arefiev, M.P., Silantiev, V.V., Eskin A.A., Kropotova, T.V. Paleosols and host rocks from the Middle–Upper Permian reference section of the Kazan Volga region, Russia: A case study. Palaeoworld 29 (2020), pp. 405-425, https://doi.org/10.1016/j.palwor.2019.05.004	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=203524&p_lang=2	ru_RU
dc.description.abstract	Palaeoworld	ru_RU
dc.description.abstract	The Urzhumian (Wordian) and Severodvinian (Capitanian) reference section of the Monastery Ravine (Kazan Volga region, Russia), containstwo siltstone lithofacies: (a) laminated and (b) massive. Depositional settings of the laminated siltstones can be interpreted as perennial to ephemerallakes; depositional settings of the massive siltstones are interpreted as floodplains with soil cover and periodical silt influx in wet seasons. The bulkgeochemistry of siliciclastics has revealed a high degree of weathering of both types of siltstone. The similar chemical composition, mineralogy,and grain size suggest the same provenance of silt material. Geochemical data indicate eastern source rocks, which are the Permian red beds of theCis-Ural plains.The main genetic types of paleosols hosted in the massive siltstones in the studied section, include moderately developed Vertisols and Calcisolswith drab-colored root traces, calcareous nodules, low chroma mottles, angular blocky peds and slickensides. These pedofeatures indicate in generala semi-arid climate with clear seasonality of rainfall. Major oxides of the paleosol matrix were used to estimate paleoprecipitation through the basesto alumina ( Bases/Al) ratio and chemical index of alteration minus potassium (CIA-K) proxies. Estimates from Urzhumian paleosols indicaterelatively low mean annual precipitation (MAP) of 390 mm/yr. The transition to the Severodvinian paleosols is marked by a noticeable MAPincrease up to 777 mm/yr. This climate moistening coincides with changes in the morphology of paleosols from dolomitic with low redoximorphyto calcitic with gley horizons. The pedogenic carbonate nodules consisting of dolomicrite (5–10 m) are very common in the Urzhumian paleosolsand their morphology, micromorhology and isotopic features indicate the pedogenic origin of dolomite.Sedimentological and paleopedological features of the studied siltstones, as well as the location of the Volga-Ural basin in a mid-latitude position(25–32◦N) indicate a monsoonal character of precipitation during the Middle Permian.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Permian	ru_RU
dc.subject	Urzhumian	ru_RU
dc.subject	Severodvinian	ru_RU
dc.subject	Siltstone	ru_RU
dc.subject	Paleosol	ru_RU
dc.subject	Dolomite	ru_RU
dc.title	Paleosols and host rocks from the Middle–Upper Permian reference section of the Kazan Volga region, Russia: A case study	ru_RU
dc.type	Articles in international journals and collections	ru_RU