Geological Survey, Gitology, and Geophysical of Deposit Tighmart (High Atlas Demnat)

Abstract

The copper site Tighmart, study area is located about 27 km NNE of the city of Demnate in the Central High Atlas. On a stand dominated by Devonian shales and sandstones with limestone benches centimeter, rests a cover Triassic (sandstone, red clay with discontinuous basalt flows) and Jurassic (Lias carbonate bars, based on consistent training gypsiferous lower Lias). The set is structured faulted anticline and eroded. Electrical tomography has been used in order to characterize the structural elements that can promote the introduction of the copper, and the mineral density. This mineralization is concentrated locally in metric nodes, formed by the junction of the N70 ° faults and N40 °. This is very crushed zones decametric extension and where there is a large concentration of chalcocite associated with malachite and azurite rarely. In general, two areas have been identified on both sides of the old gallery: -The southern part crossed by the thalweg shows the dolerite attributed resistant levels through which the levels of oxides and hydroxides of iron and aluminum at depths of 8 to 13 m. This part of the sector does not really present significant reserves given that no continuity was confirmed. -The northern part of a very rugged topography presents no surface mineralization index. However, electrical tomography profiles in this sector show large anomalous beaches right pockets found in the gallery. The examination of the values of apparent resistivity advocates appearing mineralization from 23 m deep.