Back to Search
Start Over
Cenozoic granitoids in the Dinarides of southern Serbia: age of intrusion, isotope geochemistry, exhumation history and significance for the geodynamic evolution of the Balkan Peninsula.
- Source :
-
International Journal of Earth Sciences . Aug2011, Vol. 100 Issue 5, p1181-1206. 26p. 1 Black and White Photograph, 2 Diagrams, 5 Charts, 4 Graphs, 3 Maps. - Publication Year :
- 2011
-
Abstract
- Two age groups were determined for the Cenozoic granitoids in the Dinarides of southern Serbia by high-precision single grain U-Pb dating of thermally annealed and chemically abraded zircons: (1) Oligocene ages (Kopaonik, Drenje, Željin) ranging from 31.7 to 30.6 Ma (2) Miocene ages (Golija and Polumir) at 20.58-20.17 and 18.06-17.74 Ma, respectively. Apatite fission-track central ages, modelling combined with zircon central ages and additionally, local structural observations constrain the subsequent exhumation history of the magmatic rocks. They indicate rapid cooling from above 300°C to ca. 80°C between 16 and 10 Ma for both age groups, induced by extensional exhumation of the plutons located in the footwall of core complexes. Hence, Miocene magmatism and core-complex formation not only affected the Pannonian basin but also a part of the mountainous areas of the internal Dinarides. Based on an extensive set of existing age data combined with our own analyses, we propose a geodynamical model for the Balkan Peninsula: The Late Eocene to Oligocene magmatism, which affects the Adria-derived lower plate units of the internal Dinarides, was caused by delamination of the Adriatic mantle from the overlying crust, associated with post-collisional convergence that propagated outward into the external Dinarides. Miocene magmatism, on the other hand, is associated with core-complex formation along the southern margin of the Pannonian basin, probably associated with the W-directed subduction of the European lithosphere beneath the Carpathians and interfering with ongoing Dinaridic-Hellenic back-arc extension. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14373254
- Volume :
- 100
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- International Journal of Earth Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 60801406
- Full Text :
- https://doi.org/10.1007/s00531-010-0599-x