GEOCHEMICAL FEATURES OF URAL GRANITOIDS D ERIVATIVES OF MAGMAS OF DIFFERENT COMPOSITION

In has been showed that rare elements composition of granitoid is dete rmined first by the composition of magma source. This was illustrated on the example of the two well characterized Ural magmatic series: gab bro-granitoids of Magnitogorsk and anatectic adamellite-granites of Mu rzinka. Magnitogorsk granitoids - derivatives of basic magma are enric hed in V, Co, Cr, Sc, and Y and in middle, and heavy REE, as well as i n Be, Ta, Nb, Mo, Cu, Zn and depleted in Ba, Rb, Pb, and Sr as compare d to the granitoids of Murzinka having similar compositions of petroge nic elements. The distribution of petrogenic and the most part of rare elements corresponds to the crystallization differentiation model det ermining the vertical layering of the massifs and geochemical zonality .