Age, geochemical types and ore content of granitoids at the south-eastern margin of the Baltic shield

New results of isotope dating by the pottasium-argon method of granitoids at the south-eastern margin of the Baltic shield are obtained. Geochemical types and perspective ore content of this region are studied. The evolution of granitoid magmatism of the region indicating a wide spread of highly perspective geochemical granitoids even in Precambrian is determined. The riolet-plagiogranite complex is rick in copper, tungsten and other elements, and plumazite leikogranites are perspective in tin, tantalum and niobium content