Schenker, Filippo and Burg, Jean-Pierre and Kostopoulos, Dimitrios and Moulas, Evangelos and Larionov, Alexander and von Quadt, Albrecht (2014) From Mesoproterozoic magmatism to collisional Cretaceous anatexis: Tectonomagmatic history of the Pelagonian Zone, Greece. Tectonics, 33.
Full text not available from this repository.Abstract
The magmatic history of the Pelagonian Zone, in northern Greece, is constrained with secondary ion mass spectrometer (SIMS) U-Pb dating on zircons of various granitoids whose structural positions were defined with respect to the regional main foliation. Ages pertain to four groups: (i) Mesoproterozoic (circa 1430Ma) crystallization of granites inferred from inherited magmatic zircon cores that have been partially molten during the (ii) Neoproterozoic at circa 685Ma (metamorphic zircon rims) and subsequently intruded by a Neoproterozoic leucogranite (circa 600Ma). (iii) Late- or post-Variscan calc-alkaline granitoids (315–301Ma) were in turn intruded by a subvolcanic dike at about 280Ma. In the Early Permian the εNd(t) in magmas decreased from -7.3 to -1.3, hinting to mantle-derived melts produced during extension. Rifting is further heralded by two acidic and one mafic dike containing Lower Middle Triassic zircons (246–242Ma). (iv) Early Cretaceous anatecticmelts at 117± 8Ma formed during regional metamorphism. This age is the first report of in situ anatexis in the Pelagonian Zone. Cretaceous anatexis developed during the Mesozoic collision of Pelagonia with the Eurasian margin. Major- and trace-element geochemistry of amphibolites further attests for the complex pre-Alpine tectonic history with Neoproterozoic calc-alkaline and back-arc geochemical signature and Triassic alkali-magmatism.
| Item Type: | Scientific journal article, Newspaper article or Magazine article |
|---|---|
| Subjects: | Physical sciences > Geology Physical sciences > Geology > Earth science Physical sciences > Geology > Earth science > Geoscience Physical sciences > Geology > Geochemistry |
| Department/unit: | Dipartimento ambiente costruzioni e design > Istituto scienze della Terra |
| Depositing User: | Filippo Schenker |
| Date Deposited: | 02 Mar 2016 09:16 |
| Last Modified: | 26 Apr 2016 14:32 |
| URI: | http://repository.supsi.ch/id/eprint/7154 |
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