a1 Department of Geology, Palaeontology and Fossil Fuels, Sofia University St Kliment Ohridski, BG-1504 Sofia, Bulgaria
a2 Department of Geology, Miami University, Oxford, OH 45056, USA
a3 Department of Earth Sciences, Memorial University of Newfoundland, St John's, NL A1B 3X5, Canada
a4 Department of Mineralogy, Petrology and Economic Geology, Sofia University St Kliment Ohridski, BG-1504 Sofia, Bulgaria
We report on the field occurrence and isotopic compositions of metamafic rocks exposed in the Serbo-Macedonian (Volvi and Therma bodies) and western Rhodope (Rila Mountains) massifs of Bulgaria and Greece. These metamafic units consist of high- and low-Ti gabbroic and basaltic rocks, whose Nd–Sr–Pb isotopes are compatible with mantle-derived MORB and OIB components with a small amount of crustal material involved in their melt source. These isotopic features combined with the field observations are consistent with an intra-continental rift origin of the metamafic rocks protolith, and are comparable to those of the Triassic rift-related mafic rocks in the northern Aegean region.
(Received April 06 2011)
(Accepted August 24 2011)
(Online publication September 26 2011)