Home – Home – Jornals – Russian Geology and Geophysics 2001 number 5

Thermometry and atomic-emission spectroscopy of individual fluid inclusions (FI) unsealed by laser pulse were used to study the salt and metal contents of solutions responsible for the formation of rich phenacite-bertrandite-fluorite ores and K-feldspar-fluorite rocks with poor Be mineralization. These rocks form vein zones in aluminosilicate rocks and metasomatic zones in limestones. Results of study of fluid inclusions in fluorite from hydrothermalites enriched in phenacite and/or bertrandite allow the following conclusions. At the contact with aluminosilicate rocks and earlier deposited hydrothermal minerals, ore-forming solutions were enriched in Be (to 2 g/kg solution), F (to 4.5 wt.%), and B (6-0.9 g/kg), had elevated contents of Na and K (to 2.5 and 9 wt.%, respectively), traces of Ca, Cl, and S, and a varying amount of Cu (2-0.02 g/kg solution). The concentration of Be under these conditions was, as a rule, within 2-0.3 g/kg and could remain at this high level mainly at the cost of complexes [BeF₄]²