Contributions to study of the magnesian minerals in Iuti-Tisovita-Plavisevita ophiolitic complex from Almaj Mountains (Southern Carpathians – Romania)

The Iuti-Tisovita-Plavisevita ophiolitic complex is composed of three major parts: gabbroid of Iuti and gabbroid of Plavisevita, separated by ultrabasic massive of Tisovita, and is belonging to the major unit named Danubian autochthon of the Romanian Southern Carpathians = Bulgarian Prebalkans and Stara Planina. In a broader scale the Iuti-Tisovita-Plavisevita ophiolitic complex belongs to the Tethyan-Eurasian Metallogenic Belt. He represents extension, at north from Danube, of the alignment of Paleozoic inferior basic-ultrabasic rocks from Serbia. The Tisovita-Plavisevita sector is remarkable by associations of the magnesian minerals disposed of type cross-filler and/or mass-filler in appreciable reserves. On the basis of mineralogical-petrographical investigations (optical microscopy study, diffraction RX, thermal analyses) the authors makes an attempt to reveal of this associations of magnesian minerals forming in the rocks from this ophiolitic complex