Ba-Sr-P-Ti-Tr-feldspar raw materials of Ele-Senvaara alkaline complex, Karelia: geochemistry and mineralogy of rare-earth elements

The data obtained by the economic evaluation of the complex Ba-Sr-P-Ti-TR-feldspar raw materials of Elisenvaara differentiated alkaline complex, located in the northwestern area of Lake Ladoga, Karelia, the concentrations and distribution of REE in the rocks and their mineral assemblages are reported. They are represented by monazite, orthite, TR-epidote, TR-apatite and titanite, bastnaesite, parisite, lanthanite, and Ca-Sr-Ce-carbonate. REE occur in small quantities in zircon and other silicates.