气候变化领域集成服务门户(CCPortal): Finite pattern of Barrovian metamorphic zones: interplay between thermal reequilibration and post-peak deformation during continental collision—insights from the Svratka dome (Bohemian Massif)

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DOI	10.1007/s00531-019-01788-6
	Finite pattern of Barrovian metamorphic zones: interplay between thermal reequilibration and post-peak deformation during continental collision—insights from the Svratka dome (Bohemian Massif)
	Štípská P.; Schulmann K.; Racek M.; Lardeaux J.M.; Hacker B.R.; Kylander-Clark A.R.C.; Holder R.; Košuličová M.
发表日期	2020
ISSN	14373254
起始页码	1161
结束页码	1187
卷号	109 期号:4
英文摘要	The Barrovian inverted metamorphism of the Svratka dome developed within two nappes derived from the Brunia continent that was thrust beneath the Moldanubian orogenic root. The metamorphism increases from biotite–chlorite zone in the basement to very closely spaced staurolite, kyanite and sillimanite zones at the top of the nappe pile. The sequence of mineral growth, chemical zoning of garnet, and pseudosection modelling indicate prograde paths from 4.5 kbar/510 °C to 5.5 kbar/540 °C in the garnet zone, from 6 kbar/530 °C to 7 kbar/600 °C in the staurolite zone, and from 3.5 kbar/510 °C to 8.5 kbar/650 °C in the kyanite zone. The age of monazite inclusions in garnet and staurolite is interpreted to reflect prograde metamorphism at 338 ± 7 Ma and 336 ± 7 Ma, respectively. An older matrix monazite crystal is interpreted as dating prograde crystallization at 345 ± 7 Ma, whereas a younger monazite group records recrystallization at/or down to 334 ± 7 Ma. While these petrological and geochronological data are consistent with data from an inverted metamorphic sequence of the southern Thaya dome, the spacing and distribution of metamorphic zones, nappe thicknesses, and late structures are different in the two domes. An antiformal stack of imbricated basement sheets and the extreme attenuation of metamorphic isograds at the top of the nappe pile in the Svratka dome are explained by a relatively cold overthrusting Moldanubian domain, formed mainly of middle orogenic crust. The homogeneous thickening of the hinterland-dipping basement duplexes and the regular spacing of metamorphic isograds in the Thaya dome are explained by a hot overriding Moldanubian domain, which in this region has a high proportion of exhumed lower orogenic crust and formed a hot mid-crustal channel. © 2019, Geologische Vereinigung e.V. (GV).
英文关键词	Bohemian Massif; Channel flow; Imbricated antiformal stack; Inverted Barrovian metamorphism; Monazite dating; Pseudosection modelling
语种	英语
scopus关键词	continental collision; crystallization; deformation; garnet; metamorphism; modeling; monazite; nappe; staurolite; Bohemian Massif; Brunia
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/147682
作者单位	Ecole et Observatoire des Sciences de la Terre, Institut de Physique du Globe de Strasbourg, CNRS UMR7516, Université de Strasbourg, 1 rue Blessig, Strasbourg Cedex, 67084, France; Center for Lithospheric Research, Czech Geological Survey, Praha 1, 11821, Czech Republic; Institute of Petrology and Structural Geology, Charles University in Prague, Albertov 6, Praha 2, 12800, Czech Republic; Géoazur, UMR 7329, Université Sophia-Antipolis, 250 Rue A. Einstein, Sophia-Antipolis, Valbonne, 06560, France; Department of Earth Science, University of California, Santa Barbara, CA 93106, United States; Regional Geology of Crystalline Complexes Department, Czech Geological Survey, Praha 1, 11821, Czech Republic
推荐引用方式 GB/T 7714	Štípská P.,Schulmann K.,Racek M.,等. Finite pattern of Barrovian metamorphic zones: interplay between thermal reequilibration and post-peak deformation during continental collision—insights from the Svratka dome (Bohemian Massif)[J],2020,109(4).
APA	Štípská P..,Schulmann K..,Racek M..,Lardeaux J.M..,Hacker B.R..,...&Košuličová M..(2020).Finite pattern of Barrovian metamorphic zones: interplay between thermal reequilibration and post-peak deformation during continental collision—insights from the Svratka dome (Bohemian Massif).International Journal of Earth Sciences,109(4).
MLA	Štípská P.,et al."Finite pattern of Barrovian metamorphic zones: interplay between thermal reequilibration and post-peak deformation during continental collision—insights from the Svratka dome (Bohemian Massif)".International Journal of Earth Sciences 109.4(2020).