排序方式: 共有1条查询结果,搜索用时 0 毫秒
1
1.
Żelaźniewicz Andrzej Marheine Dirk Oberc-Dziedzic Teresa 《International Journal of Earth Sciences》2003,92(2):185-194
A Variscan foreland in western Poland comprises two NW-trending basement highs, which are concealed under Carboniferous through Triassic strata of the Fore-Sudetic Monocline (FSM). Both highs consist of multiply deformed quartz-sericite - albite - chlorite phyllites of unknown protolith age. 40Ar/39Ar laser probe dating of white micas in up to 0.5-mm-thick mica layers, which form the S2 axial-plane foliation in phyllites of the Wolsztyn-Leszno High, yielded an age of 340.1DŽ.6 Ma for the lower greenschists facies metamorphism and probably also for the F2 folding. This deformation was associated and followed by thrusting, which brought about the basement highs. The latter delivered clasts to overlying late Viséan-early Namurian flysch basin that was mainly sourced from the Saxothuringian Sudetes in which most of the deformation occurred between 345-335 Ma. The FSM basement may represent an independent terrane, referred to as the Wielkopolska terrane, belonging to the Armorican Terrane Assemblage. 相似文献
1