The oldest volcanic glass in the early paleoproterozoic boninite-type lavas, Karelian craton: Results of instrumental investigations

Since Early Precambrian volcanic rocks are typically strongly altered by superimposed processes, they retain primary composition and texture only in exceptional cases. Such a case is observed in the Early Paleoproterozoic volcanic rocks of the Vetrenyi Belt Formation of the synonymous riftogenic structure in southeastern Karelia, where volcanic glass is locally preserved [1-3]. The Sm-Nd, Re-Os, and U-Pb (zircon) ages of volcanic rocks of this formation range from 2.5 Ga in the lower parts to 2.41 Ga in the upper parts of the sequence [1-3]. Zolotykh and Ladygin [4, 5] also confirmed the presence of volcanic glass in these rocks. During short-term field works in 2000, we collected additional samples in the southeastern termination of the graben-shaped Vetrenyi Belt, where the least altered rocks were preserved. The samples were mainly treated at the Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry.

Авторы
Sharkov E.V.1 , Trubkin N.V.1 , Krasivskaya I.S.1 , Bogatikov O.A.1 , Mokhov A.V.1 , Zolotykh E.B. 2 , Ladygin V.M.3 , Chistyakov A.V.1 , Evseeva K.A.1
Редакторы
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Журнал
Издательство
-
Номер выпуска
4
Язык
Английский
Страницы
580-584
Статус
Опубликовано
Подразделение
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DOI
-
Номер
-
Том
390
Год
2003
Организации
  • 1 Inst.Geol.Ore Depos.Petrogr.Mineral., IGEM, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow 109017, Russian Federation
  • 2 Russian Univ. of Peoples' Friendship, ul. Miklukho-Maklaya 6, Moscow 117198, Russian Federation
  • 3 Geological Faculty, Moscow State University, Leninskie gory, Moscow 119992, Russian Federation
Ключевые слова
chemical composition; geochemistry; lava; Proterozoic; volcanic glass; Russian Federation
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/62/