Geological and Hydrothermal Outlines of the Tunisian Fluorine Province (North-Eastern Tunisia)

ABSTRACT Compilation and treatment of geological, hydrostratigraphical, geophysical and hydrogeothermical information's are very important to assess natural resources of the sedimentary basin which is characterized by its extension, geology and hydrodynamism. Hydrochemical investigation is necessary to more understanding the relationship between thermal circulation, mineral deposits and the water -rock interaction. The chemical composition of the thermal waters seems to be controlled by the Triassic evaporate and influenced by the mineral deposits. Especially, the Fluorite deposits result from hydraulic fracturing and suggest the presence of active hydrothermal system and high temperatures in deep aquifers