Peculiarities of the Structure and Evolution of the Riphean Ai Volcanic Complex, South Uralsстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
Аннотация:The Ay volcanic complex is part of the Ay formation, which lies in limits of the south Urals at the base of the lower Riphean series. Clactics and volcanics of the Ay formation overlie the Arhean metamorphic rocks of the Taratash High. Amongst the volcanics predominates plagioclase and pyroxene bearing porphyritic trachybasalt, composed with dacite the contrasting association with characteristically increased concentration of alkali and titanium that is typical for volcanism of continental rifts. Such a model however is inconsistent with some another geochemical features, including depressed niobium content. For the Ay volcanics we obtained new geochemical and isotopic data. U-Pb age of volcanics determined for zircons from dacites (SRIMP) is 141511My.