[ Paragenèses minérales des métamorphites de Nganda-Tsundi et ses environs (Degré Carré de Tshela, Province du Kongo Central, République Démocratique du Congo) ]
Volume 43, Issue 2, August 2024, Pages 488–502
Hénock Tshombe Mbaya1, Minzadi Kinianga Belle2, Mawanzo Manzikala Carine3, Patrick Mukonkole Mukonkole4, and Simbungu Angboko Fleury William5
1 Centre de Recherches Géologiques et Minières (CRGM), B.P.: 898, Kinshasa I, RD Congo
2 Département des Géosciences, Faculté des Sciences, Université de Kinshasa B.P. 190 Kinshasa XI, Université de Kinshasa (UNIKIN), Kinshasa, Lemba, RD Congo
3 Département des Géosciences, Faculté des Sciences, Université de Kinshasa B.P. 190 Kinshasa XI, Université de Kinshasa (UNIKIN), Kinshasa, Lemba, RD Congo
4 Centre de Recherches Géologiques et Minières (CRGM), B.P.: 898, Kinshasa I, RD Congo
5 Centre de Recherches Géologiques et Minières (CRGM), B.P.: 898, Kinshasa I, 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.
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).
Author Keywords: Panafrican, West Congo belt, Kimezian, Tshela Group, metamorphism.
Volume 43, Issue 2, August 2024, Pages 488–502
Hénock Tshombe Mbaya1, Minzadi Kinianga Belle2, Mawanzo Manzikala Carine3, Patrick Mukonkole Mukonkole4, and Simbungu Angboko Fleury William5
1 Centre de Recherches Géologiques et Minières (CRGM), B.P.: 898, Kinshasa I, RD Congo
2 Département des Géosciences, Faculté des Sciences, Université de Kinshasa B.P. 190 Kinshasa XI, Université de Kinshasa (UNIKIN), Kinshasa, Lemba, RD Congo
3 Département des Géosciences, Faculté des Sciences, Université de Kinshasa B.P. 190 Kinshasa XI, Université de Kinshasa (UNIKIN), Kinshasa, Lemba, RD Congo
4 Centre de Recherches Géologiques et Minières (CRGM), B.P.: 898, Kinshasa I, RD Congo
5 Centre de Recherches Géologiques et Minières (CRGM), B.P.: 898, Kinshasa I, 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
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).
Author Keywords: Panafrican, West Congo belt, Kimezian, Tshela Group, metamorphism.
Abstract: (french)
La présente recherche porte sur l’étude des paragenèses minérales des métamorphites qui affleurent dans la région de Nganda-Tsundi et ses environs localisés dans le territoire de Tshela dans le but d’avoir les informations cohérentes en ce qui concerne les degrés de métamorphisme qui ont contribué à la transformation des roches préexistantes. La compilation des résultats du terrain (analyse macroscopique), du laboratoire et des travaux antérieurs a permis de déceler sept faciès pétrographiques principaux dans la région d’étude en occurrence le biotitoschiste, le chloritochiste, l’amphibolite, le quartzophyllade, le séricitoschiste, le métaquartzite à grenat et le schiste graphiteux. Les assemblages minéralogiques nous ont permis de distinguer trois degrés de métamorphisme dans la région d’étude à savoir: le métamorphisme de bas degré, de moyen degré et de haut degré. En combinant les données d’ordre structural telles que les schistosités observées sur le terrain et lors des observations microscopiques en lames minces, à ces dernières observations d’ordre minéralogique, nous pouvons conclure que les roches de notre région d’étude ont été affecté par deux évènements orogéniques distincts à savoir: l’orogenèse tadilienne d’âge protérozoïque qui est responsable de deux types de schistosité qui ont affectée le chloritoschiste et l’orogenèse ouest-congolienne d’âge néoprotérozoïque qui est responsable d’une seule schistosité qui affecte les autres faciès pétrographiques (biotitoschiste, amphibolite, quartzophyllade, séricitoschiste, métaquartzite et schiste graphiteux).
Author Keywords: Panafricain, Chaîne Ouest-Congo, Kimezien, Groupe de Tshela, métamorphisme.
How to Cite this Article
Hénock Tshombe Mbaya, Minzadi Kinianga Belle, Mawanzo Manzikala Carine, Patrick Mukonkole Mukonkole, and Simbungu Angboko Fleury William, “Mineral parageneses of the metamorphites of Nganda-Tsundi and its surroundings (Square degree of Tshela, Kongo Central Province, Democratic Republic of Congo),” International Journal of Innovation and Applied Studies, vol. 43, no. 2, pp. 488–502, August 2024.
