Comparative Petro-Geochemistry of the Intrusive Granitoids of the ComoéBasin and the Granitoids of the Ferkessédougou Batholith (Côte D’Ivoire, Man-Leo Shield): Geodynamic Implications for the West African Craton (WAC)  

作　　者：Tokpa Kakeu Lionel-Dimitri Boya Allou Gnanzou Aristide Ghislain Beugré Dago Nahoua Silue Koffi Raoul Teha Alain Nicaise Kouamelan Tokpa Kakeu Lionel-Dimitri Boya;Allou Gnanzou;Aristide Ghislain Beugré Dago;Nahoua Silue;Koffi Raoul Teha;Alain Nicaise Kouamelan(Laboratory of Geology, Mineral and Energy Resources/Training and Research Unit in Earth Sciences and Mineral Resources, Félix HOUPHOUËT-BOIGNY University, Abidjan, Côte d’Ivoire;Ministry of Mines, Petroleum and Energy, Duékoué Regional Directorate, Duékoué, Côte d’Ivoire)

机构地区：[1]Laboratory of Geology, Mineral and Energy Resources/Training and Research Unit in Earth Sciences and Mineral Resources, Félix HOUPHOUË T-BOIGNY University, Abidjan, Cô te d’Ivoire [2]Ministry of Mines, Petroleum and Energy, Duékoué Regional Directorate, Duékoué, Cô te d’Ivoire

出　　处：《Journal of Geoscience and Environment Protection》2022年第7期98-118,共21页地球科学和环境保护期刊（英文）

摘　　要：The study of Birimian granitoids is of great importance because it allows us to understand the architecture of the West African crust and the processes that shaped it. In order to contribute to the improvement of knowledge on the geodynamic context of the emplacement of certain granitoids of the West African craton, this article addresses some essential problems of the Birimian, namely distinguishing the real nature of the magmas and the mechanisms that generated this Birimian crust. On the West African craton, there are intrusive granites in volcano-sedimentary furrows, in meta-sedimentary basins and granites that form batholiths separating these structures. To provide an answer to this scientific concern, we conducted a comparative study of the granitoids of the Comoé basin (Tiassalé region) and those of the large batholith of Ferkessédougou (Daloa region). From this study, it appears that these Birimian granitoids have been identified as granites, granodiorites and tonalites in the Tiassalé region while in Daloa, they are assimilated to anatexites and granites. They present very diverse aspects and contexts of emplacement: the granitoids of the Comoé basin have characteristics of type I granite, indicating direct crystallization of mantle magmas in a syntectonic emplacement, while in the Daloa region, some granitoids are magmatic, others migmatitic or metasomatic, reflecting a certain complexity relating to their genesis.The study of Birimian granitoids is of great importance because it allows us to understand the architecture of the West African crust and the processes that shaped it. In order to contribute to the improvement of knowledge on the geodynamic context of the emplacement of certain granitoids of the West African craton, this article addresses some essential problems of the Birimian, namely distinguishing the real nature of the magmas and the mechanisms that generated this Birimian crust. On the West African craton, there are intrusive granites in volcano-sedimentary furrows, in meta-sedimentary basins and granites that form batholiths separating these structures. To provide an answer to this scientific concern, we conducted a comparative study of the granitoids of the Comoé basin (Tiassalé region) and those of the large batholith of Ferkessédougou (Daloa region). From this study, it appears that these Birimian granitoids have been identified as granites, granodiorites and tonalites in the Tiassalé region while in Daloa, they are assimilated to anatexites and granites. They present very diverse aspects and contexts of emplacement: the granitoids of the Comoé basin have characteristics of type I granite, indicating direct crystallization of mantle magmas in a syntectonic emplacement, while in the Daloa region, some granitoids are magmatic, others migmatitic or metasomatic, reflecting a certain complexity relating to their genesis.

关 键 词：Petro-Geochemistry Birimian Granitoid Comoé Basin Ferkessédougou Batholith Côte d’Ivoire 

分 类 号：P59[天文地球—地球化学]