Based on mineral associations determined in high - temperature muscovitic gneisses of the Valandovo - Bogdanci low ­ pressure metamorphic complex two metamorphic zones are distinguished: andalusite - muscovite and sillimanite - muscovite - K ­ feldspar. Mineral associations distinguished for andalusite - muscovitic zone indicate T from 570 to 610 °c and P = 3.5 - 3.75 Kb, whereas for sillimanite - muscovitic -K -feldspar higher T ranging from 650 to 670 °c and P = 3.5 -3.75 Kb . The occurrence of high - temperature low - pressure rocks in a wide elongated belt point to typical Abakuma type of regional metamorphism.

Volcanic rocks of dacitic to rhyolitic composition and strongly hydrothermally altered dacitoids crop out within the metamorphic and granitic terrains near the peaks of Kadijca and Bukovik in the eastern edge of the Pehčevo-Delchevo Tertiary graben. Data obtained on a surface of about 4 square kilometers show that the Bukovik volcanic body represents a volcanic apparatus that underwent intense argillization, sillification and carbonatization, and hosted porphyry copper mineralization with base metal and noble metal minerals. Further studies have to evaluate the economic importance of the mineralizations.

the work about metamorphism of the Fe-Ni ores from Rzanovo ­ Studena Voda, deals with the problem of the degree of metamorphism, on the bases of the consolidatet mineral paragenesis in the Fe-Ni ores. There is consolidated a very low degree of metamorphism form the greenshist­ pellyite facies til the begining of the facies of green shists.