2017Moscow University Geology BulletinRequires access

The structural and textural features of felsic volcanics of the Sarbai Formation (Southern Urals)

V. V. Dyakonov, O. V. Yapaskurt, Alexander E. Kotelnikov, K. I. Fedosova

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Abstract

The results of a microscope study of samples of felsic volcanic rocks from the upper horizons of the Sarbai Formation (O 2 –S 1 sb) in the Southern Urals that compose the formation are presented. A detailed study of the samples and an evaluation of the results of a silicate analysis of these rocks showed their volcanogenic genesis. The rocks have been classified as volcanic glass that underwent several stages of transformation. Three newly-formed structural and textural types of mineralization were defined: spherulitic (felsophyric), axiolitic, and felsitic.

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The results of a microscope study of samples of felsic volcanic rocks from the upper horizons of the Sarbai Formation (O 2 –S 1 sb) in the Southern Urals that compose the formation are presented. A detailed study of the samples and an evaluation of the results of a silicate analysis of these rocks showed their volcanogenic genesis. The rocks have been classified as volcanic glass that underwent several stages of transformation. Three newly-formed structural and textural types of mineralization were defined: spherulitic (felsophyric), axiolitic, and felsitic.

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Available abstract

The results of a microscope study of samples of felsic volcanic rocks from the upper horizons of the Sarbai Formation (O 2 –S 1 sb) in the Southern Urals that compose the formation are presented. A detailed study of the samples and an evaluation of the results of a silicate analysis of these rocks showed their volcanogenic genesis. The rocks have been classified as volcanic glass that underwent several stages of transformation. Three newly-formed structural and textural types of mineralization were defined: spherulitic (felsophyric), axiolitic, and felsitic.

Key concepts: Felsic, Geology, Volcanic rock, Geochemistry, Volcano, Mineralization (soil science), Silicate, Petrology

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