Reconnaissance Des Minéraux Lourds Dans Les Alluvions d’Acif El Hammam En Grande Kabylie.

Abstract

The Great Kabylia belongs to the internal domain of the chain of the Maghrebids, it is subdivided into two units separated by a chaotic zone: the crystallophyllian base and the Kabyle Ridge, a chaotic zone separates them called the contact zone. Mineralizations have been identified in the basement, the contact zone and the Kabyle Ridge, some have been studied and others are still poorly understood. No Alluvial Prospecting has been undertaken in Greater Kabylia despite the existence of several mineralized showings and a sufficiently developed hydrographic network, Acif El Hammam which is part of the sector of our study intersects from south to north, the formations of the Kabyle Ridge. , the chaotic zone and the metamorphic terrain of the Kabyle Base. The purpose of alluvial prospecting is to identify anomalies zones and to trace points of attachment in relation to mineralization in elements of economic value. The recognition of heavy minerals in the alluvium of Acif El Hammam was undertaken by following the standard protocol: recovery of the concentrate, particle size analysis, physico-chemical treatment, density and magnetic separation, finally dentification with a binocular magnifying glass. Mineralogical study revealed that the heavy fractions of these alluviums consist mainly of zircon, pyrrhotite, hematite, magnetite, martite, galena, sphalerite, malachite and chalcopyrite. These minerals can have two origins; minerals in elongated form and in rods come from the crystallophyllian basement and rounded sedimentary minerals from the driver of the Kabyle Ridge