Paleostress reconstruction and tectono-structural evolution of the West-Congo Orogen, in Republic Democratic of Congo and Republic of Congo.
| dc.contributor.author | Nkodia, H. | |
| dc.contributor.author | Boudzoumou, F. | |
| dc.contributor.author | Miyouna, T. | |
| dc.contributor.author | Delvaux, D. | |
| dc.coverage.spatial | Congo | |
| dc.coverage.spatial | Congo, The Democratic Republic of the | |
| dc.date | 2021 | |
| dc.date.accessioned | 2024-03-14T13:25:37Z | |
| dc.date.available | 2024-03-14T13:25:37Z | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/12769 | |
| dc.description | The West-Congo Belt is a Panafrican orogen located in the African side which was part of the Araçuai-West-Congo orogen during the assembly of Congo and Sao Franciso craton of the west Gondwana supercontinent. Over last decades, detailed structural studies have been conducted mostly in the Brazilian sides but few focused on paleostress and its significance to overall evolution of the Araçuaì-West Congo orogen. A DEM and a detail field structural analysis of the foreland and the front of the hinterland were carried out in order to produce a structural map of the West Congo orogen. The paleostress and kinematic analysis of the West Congo belt conducted has showed 28 stage stress tensors. All these stages constituted long period of deformation from the Neoproterozoic until present day probably. From 28 stress stages we come to the evidence that the West Congo belt has experienced an oblique convergence expressed in progressive deformation by two major stages of deformation. The first stage of deformation is NNE-SSW to NE-SW oriented compressional to strike-slip regime that resulted in the development of major conjugate NW-SE dextral strike-slip brittle and NE-SW to ESE-WSE brittle-ductile shear zones and WNW-ESE to NW-SE folds, and the second that stage that is a E-W compressional to strike-slip regime, this stage reactivated earlier shear zones in reverse kinematics N-S to NE-W fold. This suggest that during the development of the Araçui-West Congo the Congo craton rotated clockwise, this rotation could be forced by collision of the West African, eastern Saharan cratons in the north. This also confirms that the Araçuaì is a forced orogen. | |
| dc.language | eng | |
| dc.title | Paleostress reconstruction and tectono-structural evolution of the West-Congo Orogen, in Republic Democratic of Congo and Republic of Congo. | |
| dc.type | Conference | |
| dc.subject.frascati | Earth and related Environmental sciences | |
| dc.audience | Scientific | |
| dc.subject.free | Geodynamics and mineral resources | |
| dc.source.title | 7th International Geologica Belgica meeting Geosciences Made in Belgium , 15-17 September 2021, AfricaMuseum, Tervuren | |
| dc.source.volume | Abstract book, p. 57. | |
| Orfeo.peerreviewed | No | |
| dc.identifier.rmca | 6160 |
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