DOI: 10.1007/s00531-016-1375-3
Scopus记录号: 2-s2.0-84978763324
论文题名: The timing of metamorphism in the Odenwald–Spessart basement, Mid-German Crystalline Zone
作者: Will T.M. ; Schulz B. ; Schmädicke E.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2017
卷: 106, 期: 5 起始页码: 1631
结束页码: 1649
语种: 英语
英文关键词: 40Ar/39Ar age data
; In situ monazite age dating
; Mid-German Crystalline Zone
; Odenwald–Spessart basement
; Paired metamorphic belt
; Terrane boundary
Scopus关键词: age determination
; argon-argon dating
; basement rock
; eclogite
; granulite facies
; high pressure
; high temperature
; metamorphism
; monazite
; plate boundary
; subduction zone
英文摘要:
New in situ electron microprobe monazite and white mica 40Ar/39Ar step heating ages support the proposition that the Odenwald–Spessart basement, Mid-German Crystalline Zone, consists of at least two distinct crustal terranes that experienced different geological histories prior to their juxtaposition. The monazite ages constrain tectonothermal events at 430 ± 43 Ma, 349 ± 14 Ma, 331 ± 16 Ma and 317 ± 12 Ma/316 ± 4 Ma, and the 40Ar/39Ar analyses provide white mica ages of 322 ± 3 Ma and 324 ± 3 Ma. Granulite-facies metamorphism occurred in the western Odenwald at c. 430 and 349 Ma, and amphibolite-facies metamorphism affected the eastern Odenwald and the central Spessart basements between c. 324 and 316 Ma. We interpret these data to indicate that the Otzberg–Michelbach Fault Zone, which separates the eastern Odenwald–Spessart basement from the Western Odenwald basement, is part of the Rheic Suture, which marks the position of a major Variscan plate boundary separating Gondwana- and Avalonia-derived crustal terranes. The age of the Carboniferous granulite-facies event in the western Odenwald overlaps with the minimum age of eclogite-facies metamorphism in the adjacent eastern Odenwald. The granulite- and eclogite-facies rocks experienced contrasting pressure–temperature paths but occur in close spatial proximity, being separated by the Rheic Suture. As high-pressure and high-temperature metamorphisms are of similar age, we interpret the Odenwald–Spessart basement as a paired metamorphic belt and propose that the adjacent high-pressure and high-temperature rocks were metamorphosed in the same subduction zone system. Juxtaposition of these rocks occurred during the final stages of the Variscan orogeny along the Rheic Suture. © 2016, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978763324&doi=10.1007%2fs00531-016-1375-3&partnerID=40&md5=780f1963cbbe6f4651e48e73dda3a918
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70017
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institut für Geographie und Geologie der Universität Würzburg, Am Hubland, Würzburg, Germany; Institut für Mineralogie, TU Bergakademie Freiberg, Brennhausgasse 14, Freiberg, Germany; GeoZentrum Nordbayern, Universität Erlangen-Nürnberg, Schlossgarten 5a, Erlangen, Germany
Recommended Citation:
Will T.M.,Schulz B.,Schmädicke E.. The timing of metamorphism in the Odenwald–Spessart basement, Mid-German Crystalline Zone[J]. International Journal of Earth Sciences,2017-01-01,106(5)