Geochemistry of Terrigenous-Carbonate and Sulphate Rocks of Solikamsk Suite (Solikamskaya Depression of Uralian Foredeep)

T A Kalinina, E P Chirkova, I I Chaykovskiy

Abstract


The article presents the new geochemical data on terrigenous-carbonate and sulphate rocks of Solikamsk Suite (Ufimian Stage of Lower Series of Permian System). The obtained results showed that the main geochemical specialization of accessory elements is not governed by seawater chemistry only, but with presence of the terrigenous material presumably formed due to destruction of the intermediate and siliceous rocks from Urals folded area. Solikamsk sulfates are enriched with Zn, Bi, Te, Cd and In that suggests the valuable role of the Ural’s aluminosilicate material in evaporite sedimentation and existence of reductive conditions favourable for sulfide precipitation. High concentration of accessory elements at the bottom of geological cross-section may be connected to precipitation of these elements (which were concentrated in a brine of the Kungurian paleo-basin) because of sorption by the clay minerals, which were deposited in a basin at the beginning of Solikamsk time.


Keywords


litho-geochemistry; accessory elements; evaporates

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DOI: http://dx.doi.org/10.17072/psu.geol.30.14

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