INFLUENCE OF TECTONICS ON THE CIRCULATION OF MINERALIZED FLUIDS IN THE EBBA SOUTH ARLIT SECTOR (NIGER)

The present work investigated tectonics effects on the circulation of mineralizing fluids in the south Ebba sector. The study of the wells, the evaluation of the indices, the observation of the fronts and facings, as well as the calculation method and the presentation of the indices made it possible to obtain the following results: Maps of the distribution of the values of the organic matter, pyrite, carbonates and oxyhydroxides parameters within the Ebba Sud sector. The maps of the different parameters permitted, on the one hand, to better distinguish the redox aspect of the Ebba south sector and, on the other hand, to highlight the redox front.All results show that the west is less oxidized within the Ebba Sud sector and the east is more oxidized. The interface between these two parts corresponds to the redox front where most of the mineralization is concentrated. The latter was formed by the redox mechanism associated with meteoric fluid circulation with predominant structural control. The structures that have contributed to fluid transmission are brittle accidents, in particular, bend No. 30 and the rheology of the surrounding formation, by exercising control at the scale of the mining sector.