Analysis of Geochemical Data of Mica for the Development of Mineral Resources: Case of Southern Madagascar, Beraketa.

Beraketa is one of the localities in the South of Madagascar which has a strong potential in phlogopite mineral deposite. Many exploration operations are located in this area, the most important of which is the underground mine of Ampandrandava. The zone enters the shear axis of Ravintsara - Bongolava with a strong intensity of metamorphism. Various chemical and structural reactions have contributed to the deposits of numerous minerals in the region, namely: phlogopite, calcite, anhydrite, diopside, pyrite. Geochemical analysis has been carried out on samples collected, to assay the elements SiO2, TiO2, Al2O3, Cr2O3, FeO, MnO, MgO, BaO, K2O, NaO2, F and Cl in the phlogopites of the sector. These have been established with an aim of determining the structures and quality of these minerals and establishing an iso-content map for recovery for rational exploitation.