MINERALOGICAL AND GEOCHEMICAL FEATURES OF APATITE-FLUORITE ROCKS OF THE BURPALA MASSIF IN THE NORTHERN BAIKAL REGION

The Burpala massif located in the Northern Baikal region contains ore-bearing pegmatites, carbonatites and apatite-fluorite rocks with Zr-Nb-REE-rare-metal mineralization. Considering their petrological, geochemical, geological thermobarochemical features, it was established that were formed from a residual fluid melt containing minor CO 2 , increased P O 5 F. Apatite-fluorite of are similar to foscorite formations most carbonatite complexes distinguished by presence fluorite. mineral composition these for first time studied details. In addition apatite fluorite, following minerals present: zircon, baddeleyite, barite-celeistine, barite, thorianite, ilmenite, magnetite, hematite, biotite, potassium feldspar, pyroxene, as well rare high Ta, Nb Pb content.