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dc.contributor.author
Schenker, Filippo L.
dc.contributor.author
Burg, Jean-Pierre
dc.contributor.author
Kostopoulos, Dimitrios
dc.contributor.author
Baumgartner, Lukas P.
dc.contributor.author
Bouvier, Anne-Sophie
dc.date.accessioned
2019-01-30T07:46:58Z
dc.date.available
2019-01-30T07:46:58Z
dc.date.issued
2018-03
dc.identifier.issn
0024-4937
dc.identifier.other
10.1016/j.lithos.2018.01.011
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/321180
dc.identifier.doi
10.3929/ethz-b-000258126
dc.description.abstract
Carbonatitic dykes surrounded by K-Na-fenites were discovered in the Pelagonian Zone in Greece. Their carbonate portions have an isotopic mantle signature of δ13C and δ18O ranging from −5.18 to −5.56 (‰ vs. VPDB) and from 10.68 to 11.59 (‰ vs. VSMOW) respectively, whereas their mafic silicate portions have high Nb, Ta and ɛNd values, typical of alkaline basalts. Textural relationships hint at a cogenetic intrusion of silicate and carbonate liquids that according to antithetic REE profiles segregated at shallow depths (<0.6 GPa) from a parental melt sourced deeper in the mantle. Fenites bear similar REE abundances to mafic rocks but with high Rb-Ba and low Nb-Ta values. SHRIMP II U-Pb analyses of magmatic zircon cores (δ18O = 7.21–7.51) from a carbonate-bearing syenitic amphibolite yielded a Permian intrusion age at 278 ± 2 Ma, considerably older than a Cretaceous (118 ± 4 Ma) greenschist overprint obtained from metamorphic zircon rims (δ18O = 6.78–7.02). From 300 to 175 Ma the ɛNd of the Pelagonian magmatism rose irregularly to more primitive values attesting to a higher increment of asthenosphere-derived melts. In this context, the carbonatite formed within a transtensional regime of an intra-Pangaea dextral transform fault that signalled the forthcoming penetrating breakoff of the supercontinent, manifested in the Permo-Triassic.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
Carbonatite
en_US
dc.subject
fenite
en_US
dc.subject
Pelagonia
en_US
dc.subject
Pangaea
en_US
dc.subject
Permian
en_US
dc.subject
Tethys
en_US
dc.subject
Variscan
en_US
dc.title
Carbonatitic dykes during Pangaea transtension (Pelagonian Zone, Greece)
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2018-03-02
ethz.journal.title
Lithos
ethz.journal.volume
302-303
en_US
ethz.journal.abbreviated
Lithos
ethz.pages.start
329
en_US
ethz.pages.end
340
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03392 - Burg, Jean-Pierre (emeritus)
en_US
ethz.date.deposited
2018-04-14T02:38:39Z
ethz.source
WOS
ethz.source
BATCH
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-01-30T07:47:15Z
ethz.rosetta.lastUpdated
2022-03-28T22:11:09Z
ethz.rosetta.versionExported
true
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/258126
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/320653
ethz.COinS
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