DOI: 10.1007/s00531-014-1058-x
Scopus记录号: 2-s2.0-84929152253
论文题名: Depositional ages of clastic metasediments from Samos and Syros, Greece: results of a detrital zircon study
作者: Löwen K. ; Bröcker M. ; Berndt J.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 104, 期: 1 起始页码: 205
结束页码: 220
语种: 英语
英文关键词: Depositional age
; Detrital zircon geochronology
; Greece
; Samos
; Syros
; U–Pb dating
英文摘要: Siliciclastic metasediments from the islands of Samos and Syros, Cycladic blueschist unit, Greece, were studied to determine maximum sedimentation ages. Four samples from the Ampelos unit on Samos yielded age distribution spectra that range from ~320 Ma to ~3.2 Ga with a dominance of Cambrian–Neoproterozoic zircons (500–1,100 Ma). The youngest well-constrained age groups cluster at 500–550 Ma. Our results allow to link the Samos metasediments with occurrences showing similar age distribution patterns elsewhere in the eastern Mediterranean region (Greece, Turkey, Libya, Israel and Jordan) that record the influx of ‘Pan-African’ detritus. The lack of post-500-Ma zircons in the Samos samples is in marked contrast to the data from Syros that indicates Triassic to Cretaceous depositional ages. The samples from Syros were collected from the matrix of a meta-ophiolitic mélange that is exposed near the top of the metamorphic succession as well as from outcrops representing the basal part of the underlying marble-schist sequence. The zircon populations from Syros were mainly supplied by Mesozoic sources dominated by Triassic protolith ages. Subordinate is the importance of pre-Triassic zircons, but this may reflect bias induced by the research strategy. Sediment accumulation continued until Late Cretaceous time, but the overall contribution of Jurassic to Cretaceous detritus is more limited. Zircon populations are dominated by grains with small degree of rounding suggesting relatively short sediment transportation. Available observations are in accordance with a model suggesting deposition close to the magmatic source rocks. © 2014, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929152253&doi=10.1007%2fs00531-014-1058-x&partnerID=40&md5=87027a94590aadfd47812a03248df7a6
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70329
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Institut für Mineralogie, Westfälische Wilhelms-Universität Münster, Münster, Germany
Recommended Citation:
Löwen K.,Bröcker M.,Berndt J.. Depositional ages of clastic metasediments from Samos and Syros, Greece: results of a detrital zircon study[J]. International Journal of Earth Sciences,2014-01-01,104(1)