This petrographic study involves analyzing rocks to understand their mineralogical composition, origin, and characteristics. The regional geological description allowed us to understand its geological history as well as the diversity of its rock formations by identifying and characterizing the different rocks present in the region. Microscopic analysis of thin sections helped us understand the mineralogical composition of our geological formations to gain insight into the geological processes that formed these rocks and their importance in understanding the geological phenomena of the region. In short, the study area includes metamorphic assemblages: gneisses, migmatites, amphibolites, amphiboloschists, chloritoschists, and metaquartzites. They therefore correspond to three metamorphic domains: Epizone, Mesozone, and Catazone.
The formations of this region are essentially metamorphic Granit-Gneissic of which the term granitic is descended of the granitization-migmatization of Kimezien. Two tectonic periods have been demonstrated by double schistosities noticed to the level of the micas. The geochronology of these formations will be able to bring more precision on the age of these formations and that has the end will confirm or will invalidate the thesis to evoke in this survey.
This cartographic survey has been done from the samples of cores of polls achieved on longitudinal and transverse profiles as well as by the modelling, appropriated precisely in the concession of the mining of Bakwanga on the massif 12.
Of these data of polls, we could achieve a cartographic survey and deduct the structure of this massive kimberlitic under survey.
Let’s note that most polls on this massif, met the sand, sandstone, the epiclastic kimberlite, the xenokimberlite, the massive kimberlite and the limestone.
In a general manner, to part the limestone, the dolomite, sandstone and the sand, three facies kimberlitics has been put in evidence in this publication and it, according to the percentage in kimberlitics elements, it is about of:
- The kimberlite very tender epiclastic (0-25% of kimberlitic elements).
- The little strengthened xenokimberlite (25-50% of kimberlitic elements).
- The massive kimberlite (beyond 75% of kimberlitic elements).
Show abstract
Full Text
