气候变化领域集成服务门户(CCPortal): Post-Variscan thermal history of the Intra-Sudetic Basin (Sudetes; Bohemian Massif) based on apatite fission track analysis

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DOI	10.1007/s00531-019-01777-9
	Post-Variscan thermal history of the Intra-Sudetic Basin (Sudetes; Bohemian Massif) based on apatite fission track analysis
	Botor D.; Anczkiewicz A.A.; Mazur S.; Siwecki T.
发表日期	2019
ISSN	14373254
起始页码	2561
结束页码	2576
卷号	108 期号:8
英文摘要	The Intra-Sudetic Basin, a ~ 12 km deep Variscan intramontane basin, has the best preserved post-orogenic sedimentary record available at the NE margin of the Bohemian Massif. Apatite fission track (AFT) analyses have been performed on 16 sedimentary and volcanic samples of Carboniferous to Cretaceous age from the Intra-Sudetic Basin to improve understanding of the post-Variscan thermal evolution. AFT central ages range from 50.1 ± 8.8 to 89.1 ± 7.1 Ma (Early Eocene to Coniacian), with 13 of them being Late Cretaceous. The mean track length values range from 12.5 ± 0.4 to 13.8 ± 0.5 (except for one sample 14.4 ± 0.2) µm. This relatively short mean track length together with the unimodal track length distributions and rather low standard deviation (0.8 to 1.7 µm) in most samples indicate a long stay in the partial annealing zone during slow cooling. However, in the northern part of the Intra-Sudetic Basin, samples show a wider track length distribution (standard deviation of 1.8 to 2.1 µm) that could indicate a more complex thermal evolution possibly related to Mesozoic reheating. Vitrinite reflectance data combined with thermal models based on the AFT results indicate that the Carboniferous strata reached maximum palaeotemperatures in the latest Carboniferous to Early Permian time, corresponding to a major coalification event. The second phase of temperature rise occurred due to Late Mesozoic sedimentary burial, but it had no influence on maturation of the Carboniferous organic matter. Final cooling phase in the Late Cretaceous–Paleogene was related to tectonic inversion of the Intra-Sudetic Basin, which occurred after deposition of a significant thickness of Cenomanian–Turonian sediments. Thermal modelling demonstrates that ~ 4 km thick cover of Upper Cretaceous sediments is required to obtain a good match between our AFT data and modelled time–temperature paths. This outcome supports a significant amount of Late Cretaceous–Paleogene inversion within the Variscan belt of Central Europe. © 2019, The Author(s).
英文关键词	Carboniferous; Coalification; Cooling; Heat flow; Mesozoic; Tectonic inversion; Thermal modelling; Variscides
语种	英语
scopus关键词	apatite; Carboniferous; coalification; cooling; fission track dating; heat flow; Hercynian orogeny; Mesozoic; thermal evolution; thermochronology; Bohemian Massif; Sudetes; Calluna vulgaris
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/147768
作者单位	Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, Kraków, 30-059, Poland; Institute of Geological Sciences PAS, ul. Senacka 1, Kraków, 31-002, Poland
推荐引用方式 GB/T 7714	Botor D.,Anczkiewicz A.A.,Mazur S.,et al. Post-Variscan thermal history of the Intra-Sudetic Basin (Sudetes; Bohemian Massif) based on apatite fission track analysis[J],2019,108(8).
APA	Botor D.,Anczkiewicz A.A.,Mazur S.,&Siwecki T..(2019).Post-Variscan thermal history of the Intra-Sudetic Basin (Sudetes; Bohemian Massif) based on apatite fission track analysis.International Journal of Earth Sciences,108(8).
MLA	Botor D.,et al."Post-Variscan thermal history of the Intra-Sudetic Basin (Sudetes; Bohemian Massif) based on apatite fission track analysis".International Journal of Earth Sciences 108.8(2019).