Doctor (and HDR) degree in Geology. Associate professor and researcher in Ouargla University (Algeria). My research interests include mainly : (1) Algerian phosphorites: isotopes, trace and rare earth elements geochemistry, phosphogenesis, paleo-environment reconstructions and dating. (2) Hydro-geochemical investigations on groundwater in the Algerian Sahara using trace elements and stable isotopes. (3) Statistical and geostatistical applications in different applied geology fields.