Geodynamic significance of ultramafic xenoliths from Eastern Serbia: Relics of sub-arc oceanic mantle?

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

“…Bukulja and Mt. Cer in northern Serbia have been studied by Karamata et al (1992), Cvetković et al (2007a), and Koroneos et al (2010), and their petrogenesis has been attributed to the Pannonian extension. However, the Cenozoic granitoids in southern Serbia that are subject of this study remained very poorly studied in terms of their age and geodynamic significance.…”

“…can be followed into the Mid-Hungarian fault zone and/or into the internal Dinarides and whether these intrusions represent the back-arc magmatism with respect to only one or two different subduction zones (Kovács et al 2007), or alternatively, whether they are related to post-orogenic collapse of an overthickened crust in the internal Dinarides (Koroneos et al 2010), mantle delamination and/or to extension in the Pannonian basin (e.g. Cvetković et al 2007a). Sources for the magmatic activity in the Balkan Peninsula will be discussed by integrating the large amount of published age data on other granites and contemporaneous basaltic rocks (Cvetković et al 2004a, b;Prelević et al 2005).…”

Olivine Websterite Veins Cutting the Rabrovo Serpentinites (South Macedonia): New Evidence of the Arc Setting of the East Vardar Ophiolites?

“…In Figure 5 is given Mg# vs Al2O3 (wt.%) plot for clinopyroxene. It is evident that the clinopyroxene that occurs in the studied olivine websterite veins is compositionally very similar to the clinopyroxene from olivine websterite mantle xenoliths derived from the East Serbian subcontinental mantle [11,13].…”

“…In a separate paper we shall present the full whole rock and mineral major and trace element geochemistry of this lithology, whereas in this study we focus on the major element compositions of main minerals. By comparing the compositions of the minerals from the Rabrovo websterite vein with those occurring in the olivine websterite xenoliths reported by [13], we shed more light on the significance of orthopyroxene-rich lithologies for determining the geotectonic setting of their host ophiolites.…”

“…One of the strong-est independent evidence for this hypothesis was derived from the presence and characteristics of a sub-group of olivine websterite xenoliths. [13] studied these orthopyroxene-rich xenoliths in detail and concluded that they represented lithospheric precipitates of boninite-like magmas similar to those commonly found in sub-arc settings.…”