DOI: 10.1007/s00531-015-1172-4
Scopus记录号: 2-s2.0-84942370879
论文题名: Timing of igneous accretion, composition, and temporal relation of the Kassandra–Sithonia rift-spreading center within the eastern Vardar suture zone, Northern Greece: insights into Jurassic arc/back-arc systems evolution at the Eurasian plate margin
作者: Bonev N. ; Marchev P. ; Moritz R. ; Filipov P.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期: 7 起始页码: 1837
结束页码: 1864
语种: 英语
英文关键词: Geochemistry
; Greece
; Kassandra–Sithonia ophiolites
; U–Pb geochronology
; Vardar zone
Scopus关键词: accretion
; backarc basin
; Eurasian plate
; geochronology
; igneous geochemistry
; Jurassic
; mid-ocean ridge basalt
; ophiolite
; rift zone
; spreading center
; suture zone
; temporal variation
; uranium-lead dating
; Central Macedonia
; Chalcidice [(ADS) Central Macedonia]
; Chalkidiki Peninsula
; Greece
; Kassandra Peninsula
; Sithonia
英文摘要: In the Hellenides of northern Greece, the Kassandra–Sithonia and Central Chalkidiki ophiolites constitute the Vardar suture zone against the Serbo-Macedonian margin of Eurasia. The mafic-intermediate to acid members in the crustal section of the Kassandra–Sithonia ophiolites have N- and E-MORB signatures compatible with an origin in a back-arc spreading center. The MORB mantle source has received subduction zone input from the nearby Paikon arc system as revealed by LILE and LREE enrichments. A diorite from the Gerakini complex presumably belonging to the Central Chalkidiki ophiolites shows more enriched HFSE and REE patterns relative to MORB and Na-rich character compared to the Kassandra–Sithonia ophiolites. The Sithonia ophiolite crystallization spans from 159 to 149 Ma, and the Gerakini complex diorite crystallized at 173 Ma as derived from new U–Pb zircon geochronology. The main cluster of Permo-Carboniferous, a small cluster of Neoproterozoic–Cambrian and few Proterozoic, Ordovician, Devonian, Triassic and Middle Jurassic inherited zircons derive from the Serbo-Macedonian margin units. Thus, a Late Jurassic ca. 10 Ma lasting igneous accretion of the Kassandra–Sithonia back-arc crust within the eastern Vardar zone is now well constrained and corroborated by Berriasian–Early Valanginian supra-ophiolite cover limestones. Instead of an affinity to the Central Chalkidiki ophiolites, the Gerakini diorite exhibits chemical similarity to the Chortiatis arc magmatic suite of the Circum-Rhodope belt within the eastern Vardar zone. The Gerakini diorite predates the Sithonia ophiolite in which the Chortiatis arc suite supplied Middle Jurassic inherited zircons. The Chortiatis arc compared with arc-related Evros ophiolites of the Circum-Rhodope belt in Thrace region shows the same 173–160 Ma life span and tectonic setting, implying the extension of the arc systems across the north Aegean Sea. Based on these new temporal constraints, a tectonic scenario of Jurassic subduction settings and arc/back-arc systems development in the Maliac and Vardar oceanic basins is proposed that also accounts for continental magmatism in the Serbo-Macedonian margin of Eurasia. © 2015, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942370879&doi=10.1007%2fs00531-015-1172-4&partnerID=40&md5=713c69a59ccc7087dcf23719c4da658d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70251
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 Geology, Paleontology and Fossil Fuels, Sofia University St Kliment Ohridski, Sofia, Bulgaria; Department of Geochemistry and Petrology, Geological Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria; Section of Earth Sciences and Environment, University of Geneva, Geneva, Switzerland
Recommended Citation:
Bonev N.,Marchev P.,Moritz R.,et al. Timing of igneous accretion, composition, and temporal relation of the Kassandra–Sithonia rift-spreading center within the eastern Vardar suture zone, Northern Greece: insights into Jurassic arc/back-arc systems evolution at the Eurasian plate margin[J]. International Journal of Earth Sciences,2015-01-01,104(7)