Volume 24, Issue 1, August 2018, Pages 59–67
NGOY KAZADI UMPUNGU1 and Albert KALAU2
1 Licencié en Géologie, Assistant à l’ISTA Kolwezi, Section Géologie et Mines, RD Congo
2 Licencié en Géologie, Chef des travaux à l’ISTA Kolwezi, Section Géologie et Mines, RD Congo
Original language: French
Copyright © 2018 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.
Lithostratigraphy and tectonics are the major metallogenic parameters in the development of mineralization within the Katangan Basin formations. The structural and lithostratigraphic concept of the Neoproterozoic formations of the Dipeta group can be explained by applying a qualitative method, unfortunately very laborious, to explain this sequentiality of mineralization in the bearing rocks. The Kabulungu deposit is located more or less 25 km south-west of the town of Kolwezi. This litostragraphic and petrographic study shows a special horizontal zonation: shales silicified dolomitic rocks, breaching shales, dolomitic rocks and conglomerate shales. This spatial zonation is in symbiosis with a structure that seems to be monoclinal, locally, notwithstanding the gap in R.4.2. Kabulungu is a brecciated formation with only one major preferential direction of N36 ° E break, this direction being from East to West on the anticline of the same name. The southern flank of the anticline was pushed over the northern flank along the east-west fault affecting the core of the anticline. The tectonic style for the Kabulungu region differs from other sectors only in the extent of the extrusiveness within the Kansuki fault bounded by the north and south lip. The advance of the said fault would have been put in place by an extravase mechanism of subsurface. Finally, the variation of direction following each break zone proves that the terrain of Kabulungu is unstable. The mineralization was deposited in the highly altered zones and in the referential lithological formations.
Author Keywords: Lithostratigraphy, extrusive, extravase, style, tectonics, fault, Dipeta, R.4.2, Kibarian, Katanguien.
NGOY KAZADI UMPUNGU1 and Albert KALAU2
1 Licencié en Géologie, Assistant à l’ISTA Kolwezi, Section Géologie et Mines, RD Congo
2 Licencié en Géologie, Chef des travaux à l’ISTA Kolwezi, Section Géologie et Mines, RD Congo
Original language: French
Copyright © 2018 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
Lithostratigraphy and tectonics are the major metallogenic parameters in the development of mineralization within the Katangan Basin formations. The structural and lithostratigraphic concept of the Neoproterozoic formations of the Dipeta group can be explained by applying a qualitative method, unfortunately very laborious, to explain this sequentiality of mineralization in the bearing rocks. The Kabulungu deposit is located more or less 25 km south-west of the town of Kolwezi. This litostragraphic and petrographic study shows a special horizontal zonation: shales silicified dolomitic rocks, breaching shales, dolomitic rocks and conglomerate shales. This spatial zonation is in symbiosis with a structure that seems to be monoclinal, locally, notwithstanding the gap in R.4.2. Kabulungu is a brecciated formation with only one major preferential direction of N36 ° E break, this direction being from East to West on the anticline of the same name. The southern flank of the anticline was pushed over the northern flank along the east-west fault affecting the core of the anticline. The tectonic style for the Kabulungu region differs from other sectors only in the extent of the extrusiveness within the Kansuki fault bounded by the north and south lip. The advance of the said fault would have been put in place by an extravase mechanism of subsurface. Finally, the variation of direction following each break zone proves that the terrain of Kabulungu is unstable. The mineralization was deposited in the highly altered zones and in the referential lithological formations.
Author Keywords: Lithostratigraphy, extrusive, extravase, style, tectonics, fault, Dipeta, R.4.2, Kibarian, Katanguien.
Abstract: (french)
La Lithostratigraphie et la tectonique constituent les paramètres métallogéniques majeures dans la mise en place de la minéralisation au sein des formations du bassin katanguien. Pour expliquer cette séquentialité de la minéralisation dans les roches porteuses, il y a lieu de développer le concept structural et lithostratigraphique des formations néoprotérozoïques du groupe de Dipeta en appliquant de méthode qualitative, hélas très laborieuse. Le gisement de Kabulungu est situé plus ou moins à 25 km au sud –ouest de la ville de Kolwezi. Cette étude litostragraphique et pétrographique montre une zonation horizontale spéciale suivante : les shales, les roches dolomitiques silicifiées, les shales formant une brèche, les roches dolomitiques et les shales conglomératiques. Cette zonation spatiale est en symbiose avec une structure qui semble être monoclinale, sur le plan local, nonobstant la lacune du R.4.2. Kabulungu est une formation brechiée qui présente une seule direction préférentielle majeure de cassure N36°E, cette direction s’étant d’Est-Ouest sur l’anticlinal du même nom. Le flanc sud de l’anticlinal a été poussé au-dessus du flanc nord le long de la faille est-ouest affectant le noyau de l’anticlinal. Le style tectonique pour la région de Kabulungu se distingue des autres secteurs uniquement dans l’ampleur du phénomène extrusif au sein de la faille de Kansuki limitée par la lèvre nord et sud. L’avancée de la dite faille aurait été mise en place par un mécanisme extrusif extravase de subsurface. Enfin la variation de direction suivant chaque zone de cassure prouve à suffisance que le terrain de Kabulungu est instable. La minéralisation s’était déposée dans les zones très altérées et dans les formations lithologiques référentielles.
Author Keywords: Lithostratigraphie, extrusif, extravase, style, tectonique, faille, Dipeta, R.4.2, Kibarien, Katanguien.
How to Cite this Article
NGOY KAZADI UMPUNGU and Albert KALAU, “CONCEPT STRUCTURAL ET LITHOSTRATIGRAPHIQUE DES FORMATIONS NEOPROTEROZOIQUES DU GROUPE DE DIPETA : CAS DU GISEMENT DE KABULUNGU, KATANGA, RDC,” International Journal of Innovation and Applied Studies, vol. 24, no. 1, pp. 59–67, August 2018.
