GEOLOGA AND GEOCHEMISTRY OF THE RAŠTELICA BARITE DEPOSITS SOUTHWEST OF SARAJEVO, BOSNIA AND HERZEGOVINA

Abstract

The Raštelica barite deposit occurs in the lowest part of Permian carbonate rocks along their contact with underlying Middle Permian variegated sandstones. Mineralization is in form of a few twn meters long and 0,3 to 3 m thick conformable bedded lensoid bodies. Crude ore contains 90% of BaSO4. Bornite is the main copper mineral associated with chalcopyrite. Content of SrSO4 in barite is 4.4%. δ34S of sulphate sulphur is +9.5‰ indicating source of sulphur from the Permian sea water. Fluid inclusions were performed on quartz and barite crystals. Warming of frozen inclusions gave rise of four or five solid phases. Homogenization temperature for all inclusions were measured from +220 to +350°C. Salinity was obtained between 32.6 and 32.9 wt% NaCl equ. Most of features suggest submarine hydrothermal origin.

Keywords

• Bosnia
• Raštelica
• Permian strata-bound barite deposit
• SrSO4%
• δ34S of barite
• fluid inclusions data