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Role of deep-seated differentiation in formation of Paleoproterozoic Sinegorie lava plateau of komatiite basalts, southeastern Fennoscandiaстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Kulikov V.S., Bychkova Y.V., Kulikova V.V., Koptev-Dvornikov E.V., Zudin A.I.
- Журнал: Petrology
- Том: 13
- Номер: 5
- Год издания: 2005
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 469
- Последняя страница: 488
- Аннотация: A comprehensive geologic, petrologic, and geochemical study was performed for Paleoproterozoic (2.45-2.41 Ga) komatiite basalts in the southeastern part of the Vetreny Belt paleorift (Sinegorie). A representative section of the Sinegorie lava plateau (62 flows) > 3.15 km thick was drawn using an original method. The volume of the erupted mantle material was estimated as at least ten thousands of cubic kilometers only in the studied part of the structure. Modeling of differentiation of komatiite melts using KOMAGMAT software package showed significant role of olivine fractionation in this process. The observed natural variations in chemical compositions of lava flows can be best reproduced at pressure of about 8 kbar (about 25 km). The model of generation and evolution of the calculated primary komatiite melt suggests its differentiation in a supracrustal "plume pillow" of the Early Paleoproterozoic Windy Belt plume. It was responsible for the formation of the Vetreny Belt paleorift with its thick sequence of komatiite basalt lavas and numerous comagmatic intrusive rocks, as well as other mafic-ultramafic intrusions that were emplaced in the paleorift sides, including the Burakovo layered massif, the largest one on the Fennoscandian Shield.
- Добавил в систему: Коптев-Дворников Евгений Владимирович