Contribution à l étude des perlites du dôme volcanique de Hammam Boughrara (Ouest Algérien), comparaison avec les perlites de Kef Chéraïa (Région de Collo).

Abstract

Perlite is derived from a volcanic rock, typically acidic in nature with a vitreous texture,associated with recent volcanism, generally of Cenozoic to Quaternary age. It is used in a wide range of sectors including agriculture, construction, and the pharmaceutical industry. The production (processing) of perlite for The physico-chemical properties acquired after heat treatment such as: low density, porous texture, low thermal conductivity, high sound absorption and also chemical stability. The study presented in this thesis aims at comparing the different perlite deposits in Algeria, in particular: the rhyolitic dome of Hammam Boughrara located at the extreme west of the country in the Wilaya of Tlemcen and the rhyolitic dome of Kef Chéraïa located at the east of the country in the wilaya of Skikda. This comparison is made on the petrological, petrographic and physico-chemical levels. This study indicates that the formations studied, in particular the rhyolite of the two domes are more or less identical on the more petrographic level, however, the perlite of Hammam Boughrara shows a perlitic texture proper, contrary to that of Kef Chéraïa.