气候变化领域集成服务门户(CCPortal): Detrital zircon provenance of Carboniferous sandstones of the Variscan Externides (SW Poland) – record of the eastern Variscides exhumation

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DOI	10.1007/s00531-020-01894-w
	Detrital zircon provenance of Carboniferous sandstones of the Variscan Externides (SW Poland) – record of the eastern Variscides exhumation
	Zagórska U.; Kowalska S.; Sláma J.; Dziubińska B.; Wolański K.
发表日期	2020
ISSN	14373254
起始页码	2169
结束页码	2187
卷号	109 期号:6
英文摘要	The Variscan Externides in the area of south-western Poland (the basement of the Fore-Sudetic Monocline), are considered an extension of the Rheno-Hercynian Zone of the Variscan Orogen. The Externides are made of Carboniferous siliciclastic sediments, the exact stratigraphic age and provenance of which are not known in detail. To constrain the sedimentary evolution and detritus provenance of the Variscan external belt, eight sandstone samples from boreholes located in the area of SW Poland were selected for petrography, whole rock geochemistry and detrital zircon U–Pb dating. The results show abrupt change in detrital zircon U–Pb provenance, between strata that have been classified as Mississippian (L. Carboniferous) and Pennsylvanian (U. Carboniferous) based on previously published miospore zonation. The Pennsylvanian rocks (from the boreholes of Września-IG1 and Siciny IG1) bear a significant population of zircon grains with Lower Carboniferous ages (350–330 Ma), while such a zircon population is absent in Lower Carboniferous rocks (from the boreholes of Paproć-29 and Kobylin 1). The absence of Moscovian to Asselian zircons that are otherwise known from the adjacent areas with zircon-bearing volcanic activity, suggests that the studied Pennsylvanian sediments represent the lower part of Upper Carboniferous. The presented data indicate abrupt provenance change that occurred in the source areas at the Mississippian—Pennsylvanian turn, and that was probably caused by changes in the tectonic architecture of the Variscan Orogen. This tectonic changeover resulted in exhumation and erosion of the Lower Carboniferous rock complexes and manifested itself by recycling of the Lower Carboniferous zircon into Upper Carboniferous strata. © 2020, The Author(s).
英文关键词	Carboniferous strata of SW Poland; Provenance; Rheno-Hercynian zone; U–Pb dating; Variscan Externides; Variscides exhumation
语种	英语
scopus关键词	age determination; Carboniferous; detrital deposit; exhumation; Hercynian orogeny; sandstone; tectonic setting; zircon; Poland [Central Europe]; Nia
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147631
作者单位	Oil and Gas Institute - National Research Institute, Lubicz 25A, Kraków, 31-503, Poland; Institute of Geology, Czech Academy of Sciences, Rozvojová 269, Praha, 165 00, Czech Republic; Institute of Geological Sciences, Jagiellonian University, Gronostajowa 3a, Kraków, 30-387, Poland; Polish Oil and Gas Company (POGC)/Exploration and Production Branch in Warsaw, Bohaterów Westerplatte 15, Zielona Góra, 65-034, Poland
推荐引用方式 GB/T 7714	Zagórska U.,Kowalska S.,Sláma J.,等. Detrital zircon provenance of Carboniferous sandstones of the Variscan Externides (SW Poland) – record of the eastern Variscides exhumation[J],2020,109(6).
APA	Zagórska U.,Kowalska S.,Sláma J.,Dziubińska B.,&Wolański K..(2020).Detrital zircon provenance of Carboniferous sandstones of the Variscan Externides (SW Poland) – record of the eastern Variscides exhumation.International Journal of Earth Sciences,109(6).
MLA	Zagórska U.,et al."Detrital zircon provenance of Carboniferous sandstones of the Variscan Externides (SW Poland) – record of the eastern Variscides exhumation".International Journal of Earth Sciences 109.6(2020).