[ L’application des méthodes de reconnaissance géologique dans la recherche des indices minéraux: Cas du secteur de Ngungu-Rufufu à Masisi-Nord-Kivu, RD Congo ]
Aganze Birindwa Mirobolant1, Ken Yumba Musoya2, Kongolo Kiluba Carmel3, Mwamba Kayenga Jean4, and Yenga Muzinga Tony5
1 Université de Manono (U.M.A), RD Congo
2 Université de Manono (U.M.A), RD Congo
3 Université de Manono (U.M.A), RD Congo
4 Université de Manono (U.M.A), RD Congo
5 Wali Mining Investment Sarl, RD Congo
Original language: French
Copyright © 2024 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Located in the North Kivu province, Masisi territory, Ngungu group, sector of bahemba and locality of Kaseke, the sector is typical of vegetation dominated by grassy savannahs with the main crops: cereals (corn), tubers (cassava, potato, sweet potato), rugged geomorphology containing plateaus dotted with a few hills and mountains and an average hydrographic network. The Ngungu-Rufufu sector is in Kibaro-Burundi. It is located near the lower Kibarian and abounds in metamorphic formations such as schists, phyllites, quartzo-phyllites, various quartzite alternations, granites, etc. Structurally, these formations are oriented NE-SW in the form of a folded chain having undergone shearing with, however, frequent virgations towards the NW. These virgations are much more observed at the west of Lake Kivu and in Maniema. The lower Kibarian was affected by granitic rocks of various types of age 950-1000 Ma, by pegmatite and by various basic rocks, mainly gabbros, diorites and dolerites. At Ngungu-Rufufu, the following lithologies have been identified: Talc sericite Schist, Quartz mica schist, quartzite, pegmatite, kaolinite, granite and «greisen» explained by the absence of feldspar. The Mineralization in the lower Kibarian is associated with acid magmatism mainly in Granite G4, dated at 976 Ma. This granite forms the last member of Kibarian magmatic events. It is red leucogranite with muscovite, tourmaline and garnet. In this regard, our study area is characterized by the mineralization of Sn, Ta and Nb in the pegmatitic and granitic rock, at the Center and the South-West of the sector. The Wolfram (W) and Gold (Au) mineralization is much more pronounced in the quartz vein. The reconnaissance methods used are the geological and topographical survey, Sampling of stream sediments, Cartography of the Galleries which would serve as simulation in the trench study and the Pitting or Wells. Finally, an assessment of tonnage was made according mineral grade.
Author Keywords: Ngungu-rufufu, kibarian, method, lithology, indice, mineralization.
Aganze Birindwa Mirobolant1, Ken Yumba Musoya2, Kongolo Kiluba Carmel3, Mwamba Kayenga Jean4, and Yenga Muzinga Tony5
1 Université de Manono (U.M.A), RD Congo
2 Université de Manono (U.M.A), RD Congo
3 Université de Manono (U.M.A), RD Congo
4 Université de Manono (U.M.A), RD Congo
5 Wali Mining Investment Sarl, RD Congo
Original language: French
Copyright © 2024 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Located in the North Kivu province, Masisi territory, Ngungu group, sector of bahemba and locality of Kaseke, the sector is typical of vegetation dominated by grassy savannahs with the main crops: cereals (corn), tubers (cassava, potato, sweet potato), rugged geomorphology containing plateaus dotted with a few hills and mountains and an average hydrographic network. The Ngungu-Rufufu sector is in Kibaro-Burundi. It is located near the lower Kibarian and abounds in metamorphic formations such as schists, phyllites, quartzo-phyllites, various quartzite alternations, granites, etc. Structurally, these formations are oriented NE-SW in the form of a folded chain having undergone shearing with, however, frequent virgations towards the NW. These virgations are much more observed at the west of Lake Kivu and in Maniema. The lower Kibarian was affected by granitic rocks of various types of age 950-1000 Ma, by pegmatite and by various basic rocks, mainly gabbros, diorites and dolerites. At Ngungu-Rufufu, the following lithologies have been identified: Talc sericite Schist, Quartz mica schist, quartzite, pegmatite, kaolinite, granite and «greisen» explained by the absence of feldspar. The Mineralization in the lower Kibarian is associated with acid magmatism mainly in Granite G4, dated at 976 Ma. This granite forms the last member of Kibarian magmatic events. It is red leucogranite with muscovite, tourmaline and garnet. In this regard, our study area is characterized by the mineralization of Sn, Ta and Nb in the pegmatitic and granitic rock, at the Center and the South-West of the sector. The Wolfram (W) and Gold (Au) mineralization is much more pronounced in the quartz vein. The reconnaissance methods used are the geological and topographical survey, Sampling of stream sediments, Cartography of the Galleries which would serve as simulation in the trench study and the Pitting or Wells. Finally, an assessment of tonnage was made according mineral grade.
Author Keywords: Ngungu-rufufu, kibarian, method, lithology, indice, mineralization.
Abstract: (french)
Situé dans la province du Nord-Kivu, territoire de Masisi, le secteur de Ngungu se trouve dans le groupement de Ngungu, secteur de bahemba et localite de Kaseke. Le secteur est typique d’une végétation dominée par des savanes herbeuse avec comme principales cultures: de céréales (Mais), des tubercules (Manioc, pomme de terre, patate douce), géomorphologie es accidentée renfermant des plateaux parsemés des quelques collines et montagnes et un réseau hydrographique moyen. Le secteur de Ngungu-Rufufu se trouve dans le Kibaro-Burundien. Il se trouve à proximité du Kibarien inferieur et regorge des formations métamorphiques comme les schistes, phyllades, quartzo- phyllades, alternances quartzites diverses, des granites, etc. Sur le plan structural, ces formations sont orientées NE-SW sous forme d’une chaine plissée ayant subi un cisaillement avec cependant, de fréquentes virgations vers le NW. Ces virgations sont beaucoup plus observées à l’ouest du lac Kivu et au Maniema. Le Kibarien inferieur a été affecté par des roches granitiques du type varié d’âge 950-1000 Ma, par des pegmatites et par des roches basiques diverses, principalement des gabbros, diorites et des dolérites. Au niveau de notre secteur; les lithologies suivantes ont été identifiées Talc sericite Schiste, Quartz mica schiste, le Quartzite, quartzite, les pegmatites, la kaolinite, le granite et le « greisen » explicité par l’absence de feldspath. La minéralisation dans le Kibarien inferieur est associée au magmatisme acide principalement dans le Granite G4, daté à 976 Ma. Ce granite forme le dernier membre d’événements magmatiques kibariens. C’est le leucogranite rouge à muscovite, tourmaline et grenat. Y égard à cela, notre secteur d’étude est caractérisé par la minéralisation en concentration en Sn (18,0475% de Sn), Ta et Nb dans la roche pégmatitique et granitique, ceci vers le Centre et le Sud-ouest du secteur. La minéralisation en Wolfram (12,235 de W) et en Or (Au) est beaucoup plus prononcée dans le filon de quartz. Les méthodes des reconnaissances utilisées sont le levé géologique et topographique, Echantillonnage des sédiments de ruisseaux, Cartographie des Galeries qui serviraient de simulation dans l’étude de tranchée, le Pitting ou Puits. Enfin, une évaluation du tonnage a été faite.
Author Keywords: Ngungu-rufufu, kibarien, méthode, lithologie, indice, minéralisation.
