Cartographie automatique et interpretation geostatistique des données de prospection géochimique-sol du secteur de chaabet el hamra - region d’Ain Azel - Sétif

Abstract

The Mounts of Hodna have a great Zn-Pb potential. Chaabet El Hamra ore deposit which is located in the South of Setif, belongs to it. This deposit was explored by the National Office for Geological and Mining Research (ORGM) and is being operated by the National Enterprise for Non-Ferrous Mining Products (ENOF). The lead-zinc mineralization of Chaabat El Hamra is hosted mainly in the carbonate formations of the Hauterivien (Sandstone, Dolomite, dolomitic limestones). This mineralization is observed in all 5 dolomitic terms of L’Hauterivien, concentrating in mineralized bodies and lenses of sometimes monomineral, sometimes mixed composition. The main minerals are sphalerite, pyrite and marcasite; the secondary minerals are galena and hematite. The gangue minerals are calcite, barite, dolomite and more rarely quartz and gypsum. Oxidation minerals: are smithsonite, cerusite, and limonite. This research work which was carried out on the following chemical elements, Lead-Zinc-Silver for the pure purpose of treating, interpreting and statistically and geostatistically mapping geochemical anomalies. Mono, bi, and multivariable (PCA) statistical study of geochemical data was carried out to determine the correlations and geochemical associations of these elements, of which only one association was determined. The mapping of the anomalies by ordinary kriging using the results of the directional varigrams made it possible to determine the location of the various geochemical anomalies in the study area.