Composition and distinctive features of Lower Devonian volcaniclastic sediments formation of the West-Magnitogorsk zone, the Southern Urals

• Main Author: R. I. Zainullin
• Format: Article
• Language: English
• Published: A.N. Zavaritsky Institute of Geology and Geochemistry 2017-04-01
• Series: Литосфера
• Subjects: песчаники; граувакки; петрографический и химический состав; нижний девон; западно-магнитогорская зона; островная дуга; sandstone; greywacke; petrographic and geochemical composition; the lower devonian; west-magnitogorsk zone; island arc
• Online Access: https://www.lithosphere.ru/jour/article/view/82

Results of the study of volcaniclastic sandstones of the Uskul’ and Il’tibanovo strata of the Lower Devonian are presented. Sandstones are of feldspathic greywacke and greywacke lithoclastic types after classification V.N. Shvanov. They are composed primarily of fragments of basic and intermediate composition volcanic rocks, crystals of plagioclase and pyroxene. Greywacke of Il’tibanovo section are distinguished by the presence of fragments metamorphic, carbonate rocks. These rocks are different from sandstones of the sections Uskul and Talyshman by the composition and distribution of small elements. Island arc is a source of material for the sandstones. The clastic material was transported by turbidite flows.