DOI: 10.1007/s00531-014-1009-6
Scopus记录号: 2-s2.0-84899998172
论文题名: Ordovician and Cretaceous tectonothermal history of the Southern Gemericum Unit from microprobe monazite geochronology (Western Carpathians, Slovakia)
作者: Vozárová A. ; Konečný P. ; Šarinová K. ; Vozár J.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 4 起始页码: 1005
结束页码: 1022
语种: 英语
英文关键词: Alpine overprinting
; Monazite
; Southern Gemericum basement
; Th-U-Pb electron microprobe dating
; Western Carpathians
Scopus关键词: compression
; Cretaceous
; electron probe analysis
; greenschist
; lead
; monazite
; Ordovician
; tectonic evolution
; tectonic setting
; thorium
; uranium
; Carpathians
英文摘要: The Southern Gemericum basement in the Inner Western Carpathians experienced a polyphase regional deformation. Differences in the pre-Alpine and Alpine events have been constantly discussed. To address this, monazites from metapelites and acid metavolcanic rocks were dated using the Th-U-Pb electron microprobe method. Three monazite generations, such as Precambrian, Early Paleozoic, and Alpine, have been recognized in the greenschist facies pelites and acid metavolcanic rocks of the Southern Gemericum basement. Both inherited magmatic monazite grains in metavolcanites and rare relics of detrital monazites within the polyphase monazite grains in metapelites yielded the Precambrian age in the time span of 550-660 Ma. They prove the provenance and derivation from deeper crustal Cadomian fragments. High-Y magmatic monazites of Early Paleozoic age (444 ± 13 and 477 ± 7 Ma) have been recorded in the acid metavolcanites and their metavolcaniclastics. These ages roughly fit within the previously published magmatic zircon age determinations (at 494 ± 1.7 and 464 ± 1.7 Ma) that clearly indicate two-phase volcanic activity in the Early Paleozoic Southern Gemericum basin. The Early Paleozoic magmatic monazites were partly overprinted by the low-Y Alpine monazites (133 ± 5 and 184 ± 16 Ma) at their rims. In Al-rich metapelites, the newly formed low-Y monazites of Alpine age commonly occur, reflecting the polystage compression geodynamic evolution with three distinct peaks at 100 ± 8, 133 ± 5, and 190 ± 16 Ma, respectively. No data as the evidence of the pre-Alpine metamorphic events were observed in metapelites. Only some monazites yield the age indications for the Permian extensional thermal re-heating (260-290 Ma). The monazite age data from the Southern Gemericum basement indicate the strong overprinting due to the polyphase Alpine deformation at least in the greenschist facies conditions. © 2014 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899998172&doi=10.1007%2fs00531-014-1009-6&partnerID=40&md5=f949be98f65024cf132f649c8208f59e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70459
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: Department of Mineralogy and Petrology, Comenius University Bratislava, Mlynská dolina, pav. G, 842 15 Bratislava, Slovakia; State Geological Institute of Dionýz Štúr, Mlynská dolina 1, 817 04 Bratislava, Slovakia; Geological Institute, Slovak Academy of Science, Dúbravská cesta 9, P.O. Box 106, 840 05 Bratislava, Slovakia
Recommended Citation:
Vozárová A.,Konečný P.,Šarinová K.,et al. Ordovician and Cretaceous tectonothermal history of the Southern Gemericum Unit from microprobe monazite geochronology (Western Carpathians, Slovakia)[J]. International Journal of Earth Sciences,2014-01-01,103(4)