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Paléoenvironnements et caractérisation des roches mères pétrolières des séries pré-salifères du bassin intérieur du Gabon |
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| Authors: | Michel Mbina Mounguengui François Baudin Jacques Lang Olivier Jocktane |
| Affiliation: | 1. Département de géologie, université des sciences et techniques de Masuku, BP 943, Franceville, Gabon;2. Département de géologie sédimentaire et CNRS-FR 32, université Pierre-et-Marie-Curie, 4, place Jussieu, case 117, 75252 Paris cedex 05, France;3. Centre des sciences de la Terre et UMR 5561 « Biogéosciences », université de Bourgogne, 6, bd Gabriel, 21000 Dijon, France;4. Elf-Gabon, BP 525 Port-Gentil, Gabon |
| Abstract: | The Interior Basin of Gabon, created during the break-up between South America and Africa, displays thick Neoproterozoic to Aptian p.p. fluvio-lacustrine deposits overlain by Aptian to Albian marine facies. Rock–Eval analyses from outcrop and drillhole samples show high content in organic matter (up to 25%) related to types I and II. These intervals are encountered within Permian, Neocomian–Barremian as well as Aptian siliciclastic succession. They constitute fairly good to excellent potential petroleum source rocks, which are most probably at the origin of oil indices recognized both in drillholes and in surface. |
| Keywords: | Afrique Atlantique sud Permien Crétacé rift matière organique roches mères Africa South Atlantic Permian Cretaceous rift organic matter petroleum source rocks |
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