This research focuses on the study of mineral parageneses of metamorphites that outcrop in the Nganda-Tsundi region and its surroundings located in the territory of Tshela, in order to obtain coherent information regarding the degrees of metamorphism that have contributed to the transformation of pre-existing rocks. The compilation of field (macroscopic analysis), laboratory results and previous work results revealed seven main petrographic facies in the study area: namely the biotitoschist, chloritochist, amphibolite, quartzophyllade, sericitoschist, garnet metaquartzite and graphitic shale. Mineralogical assemblages enabled us to distinguish three degrees of metamorphism in the study area: low-grade, medium-grade and high-grade. By combining structural data, such as the schistosities observed in the field and during microscopic in thin sections observations, with these last mineralogical observations, we can conclude that the rocks of our study area were affected by two distinct orogenic events namely: the Tadilian orogeny of Proterozoic age which is responsible for two types of schistosity which affected the chloritoschists and the West-Congolian Neoproterozoic orogeny, is responsible for a single schistosity affecting the other petrographic facies (biotitoschist, amphibolite, quartzophyllade, sericitoschist, metaquartzite and graphitic schist).