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The Sredogriv low-grade metamorphic rocks belongs to the Montana unit of the Western Balkan Zone in northwestern Bulgaria. The low-grade rocks mainly consist of metamorphosed greenschist facies clastic-marly-tuffaceous precursors and minor basic to acidic, presumably olistostromic magmatic rock bodies. Here, we present whole-rock geochemistry of metabasic dyke-like bodies in the Sredogriv metamorphic rocks. Field observations revealed that the dyke-like bodies are intruded into the Sredogriv sedimentary succession...

The eastern Circum-Rhodope belt (CRB) is a major unit that surrounds both the Serbo-Macedonian and the Rhodope zones in the Alpine orogen of the northern Aegean region. This belt contains Triassic-Jurassic metasedimentary successions and Middle Jurassic (176-165 Ma) supra-subduction zone Evros ophiolite. The latter has experienced ocean-floor hydrothermal metamorphism or very-low to low-grade metamorphism. We report on mineral compositions of rock-forming minerals in schist and mafic rocks from the eastern CRB. Ou...