Characteristics and Constraint Evidences of the Pegmatite Veins in Lubishi Mining Sector, Kalehe District, Eastern DR Congo

Abstract

The Lubishi pegmatites of South Kivu Province (DR Congo) in the Kibaran belt, which were studied to elucidate the structural imprints and characteristics of pegmatitic rocks associated with Sn -Nb -Ta mineralization, revealed that the pegmatite veins have a general orientation trend of N150°E, similar to the Numbi mining sector, and are perpendicular to the Kibara metasediments. The pegmatite, which is composed of quartz, muscovite, and feldspar, was altered as a result of surface weathering. Due to the ambient climatic condition, the main mineralogy of the various pegmatite zones has been subjected to severe alteration with the change of feldspar to kaolinite. Micro and macro veins of pegmatite were discovered during the structural examination. The constraint stresses 1=N358°E/20°NNW, 2=N200°E/70°SSW, and 3=N88°E/20°ENE produced micro and macro veins of pegmatite, according to the structural research. The Lubishi pegmatite's overall orientation trend can be exploited for future geological exploration. To complete this study, a geochemical examination should be conducted to identify the makeup of these pegmatite.