Tectonic Evolution of Paleoproterozoic Formations in the North-East of Côte d’Ivoire (Bondoukou-Tanda, West African Craton)  

作　　者：Kouadio David Koffi Brice Roland Kouassi Raoul Koffi Teha N’Guessan Houssou Nestor Marc Ephrem Allialy Kouadio David Koffi;Brice Roland Kouassi;Raoul Koffi Teha;N’Guessan Houssou Nestor;Marc Ephrem Allialy(Laboratory of Geology, Mineral and Energy Resources/Training and Research Unit in Earth Sciences and Mineral Resources, Flix Houphout-Boigny University, Abidjan, Cte dIvoire;UFR-Biological Sciences, Geosciences Department, Peleforo Gon Coulibaly University, Korhogo, Cte dIvoire)

机构地区：[1]Laboratory of Geology, Mineral and Energy Resources/Training and Research Unit in Earth Sciences and Mineral Resources, Flix Houphout-Boigny University, Abidjan, Cte dIvoire [2]UFR-Biological Sciences, Geosciences Department, Peleforo Gon Coulibaly University, Korhogo, Cte dIvoire

出　　处：《International Journal of Geosciences》2024年第10期774-791,共18页地球科学国际期刊（英文）

摘　　要：The objective of this work is to contribute to the crustal evolution during the Paleoproterozoic in the Northeast of Côte d’Ivoire through the structural study of the Bondoukou-tanda locality. To do this, we proceeded by a macroscopic observation of the outcrops for the identification of the structures (schistosity, fold, shear, and lineation). The structures indicated the direction of the main constraints and the relative correlations between the lithologies. The structural measurements, in particular the direction and the dip obtained, were all processed by the GEOrient software to draw up the stereographic projections for a static interpretation of the measurements. Given the rarity of rock outcrops in the study area, the teleanalytical data were of considerable support in the structural analysis. The various treatments carried out on the ENVI 5.2 software made it possible to identify a total of 471 lineaments. They cover the entire area and are of variable lengths (1.24 to 9.73 km). The different directions highlighted from this methodology are a main direction: NNW-SSE to NW-SE;a secondary direction: NNE-SSW to NE-SW;a tertiary direction: ENE-WSW to E-W. Associated with the lithology map, the teleanalytical map shows that the lineaments are unevenly distributed throughout the study area. The lineaments appear more compact in the volcano-sedimentary and sandstone-conglomeratic units than in the granitoid intrusives. However, the Bondoukou granodiorite appears to be the least fractured lithology.The objective of this work is to contribute to the crustal evolution during the Paleoproterozoic in the Northeast of Côte d’Ivoire through the structural study of the Bondoukou-tanda locality. To do this, we proceeded by a macroscopic observation of the outcrops for the identification of the structures (schistosity, fold, shear, and lineation). The structures indicated the direction of the main constraints and the relative correlations between the lithologies. The structural measurements, in particular the direction and the dip obtained, were all processed by the GEOrient software to draw up the stereographic projections for a static interpretation of the measurements. Given the rarity of rock outcrops in the study area, the teleanalytical data were of considerable support in the structural analysis. The various treatments carried out on the ENVI 5.2 software made it possible to identify a total of 471 lineaments. They cover the entire area and are of variable lengths (1.24 to 9.73 km). The different directions highlighted from this methodology are a main direction: NNW-SSE to NW-SE;a secondary direction: NNE-SSW to NE-SW;a tertiary direction: ENE-WSW to E-W. Associated with the lithology map, the teleanalytical map shows that the lineaments are unevenly distributed throughout the study area. The lineaments appear more compact in the volcano-sedimentary and sandstone-conglomeratic units than in the granitoid intrusives. However, the Bondoukou granodiorite appears to be the least fractured lithology.

关 键 词：STRUCTURAL BIRIMIAN Bondoukou-Tanda Tarkwaian WAC 

分 类 号：P54[天文地球—构造地质学]