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| HAL: insu-00488579, version 1 |
| DOI: 10.1016/j.crte.2009.12.007 |
| Detailed view |  Export this paper |
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| Comptes Rendus Géoscience 342, 2 (2010) 108-115 |
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| Geological context of the Boumnyebel talcschists (Cameroun): Inferences on the Pan-African Belt of Central Africa Le contexte géologique des talcschistes de Boumnyebel (Cameroun) : implications pour la chaîne panafricaine d'Afrique centrale |
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| Clément Yonta-Ngoune 1Charles Nkoumbou 2, 3 |
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| (2010) |
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| The talcschists of the Boumnyebel area (southern Cameroon) form ≤ 30 m thick discontinuous layers within a Pan-African nappe unit (Yaoundé group), which includes, at the base, muscovite + biotite ± garnet micaschists associated with amphibolites and pyroxenites, and, at the top, muscovite + biotite + garnet + kyanite micaschists locally associated with marble and amphibolites. The metamorphic peak (not, vert, similar650 °C/9.5 kbar; ca. 620 Ma) postdates nappe emplacement. Isograds are in normal position, micaschists passing downwards to migmatites in the northwestern part of the area studied. The rock types in the lower part of this nappe suggest active margin environments with detrital input from a nearby continental crust (arc or back-arc context). |
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| 1: | Centre de recherches petrographiques et géochimiques (CRPG) |
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CNRS : UPR2300 – INSU |
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| 2: | Équipe géologie économique et environnementale, département des sciences de la terre, Faculté des sciences |
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Université de Yaoundé I |
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| 3: | Laboratoire Environnement et Minéralurgie (LEM) |
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CNRS : UMR7569 – Institut National Polytechnique de Lorraine (INPL) |
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| 4: | Institut des Sciences de la Terre d'Orléans (ISTO) |
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Université d'Orléans – CNRS : UMR6113 – Université François Rabelais - Tours – INSU |
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| 5: | Géologie et gestion des ressources minérales et énergétiques (G2R) |
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CNRS : UMR7566 – INSU – Université Henri Poincaré - Nancy I – Institut National Polytechnique de Lorraine (INPL) |
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| subject | : | Sciences of the Universe/Earth Sciences/Applied geology |
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| Pan-African belt – Cameroon – Yaoundé group – Talcschist – Metamorphism |
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| Attached file list to this document: | |||||
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| insu-00488579, version 1 | |
| http://hal-insu.archives-ouvertes.fr/insu-00488579 | |
| oai:hal-insu.archives-ouvertes.fr:insu-00488579 | |
| From: Nathalie Pothier | |
| Submitted on: Tuesday, 12 April 2011 16:45:45 | |
| Updated on: Wednesday, 13 April 2011 10:57:03 | |
