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Intra-plate gabbroic rocks of Permo-Triassic to Early-Middle Triassic dike-and-sill province of Chukotka (Russiaстатья
- Авторы: Ledneva G.V., Bazylev B.A., Layer P.W., Ishiwatari A., Sokolov S.D., Kononkova N.N., Tikhomirov Novikova P.L.M.S
- Сборник: ICAM VI: Proceedings of the International Conference on Arctic Margins VI. Stone D.B., Grikurov G.E., Clough J.G., Oakey G.N
- Год издания: 2014
- Место издания: Petersburg: VSEGEI
- Первая страница: 115
- Последняя страница: 156
- Аннотация: In order to provide basic materials for geodynamic and tectonic reconstruction of the Arctic region, we investigated Permo-Triassic to Early-Middle Triassic gabbroic rocks of tabular bodies in shelf and continental slope sediments of eastern Chukotka. These rocks, which are here referred to as the Anyui dike-and-sill province, are represented by gabbro, Fe-Ti gabbro, and gabbroic diorite assumed to be cogenetic to each other. The rocks from different tabular bodies can be originated from variably differentiated portions of melts at similar pressure and temperature conditions. The rocks show geochemical features of crustally contaminated intra-plate basaltic lavas and are geochemically similar to Permo-Triassic continental plateau basalts of the platformal (or the trap) stage of the Siberian large igneous province.
- Добавил в систему: Соколов Сергей Дмитриевич