|
|||||
|
|
Mineralogy, geochemistry and petrogenesis of the recent magmatic formations from Mbengwi, a continental sector of the Cameroon Volcanic Line (CVL), Central Africa |
|
| Authors: | Beno?t Joseph Mbassa Emmanuel Njonfang Mathieu Benoit Pierre Kamgang Michel Grégoire Stephanie Duchene Pierre Brunet Bekoa Ateba Félix M. Tchoua |
| Affiliation: | 1. Institut de Recherches Géologiques et Minières, IRGM/ARGV Ekona, B.P. 370, Buéa, Cameroon 4. Département des Sciences de la Terre, Faculté des Sciences, Université de Yaoundé I, B.P. 812, Yaoundé, Cameroon 2. Laboratoire de Géologie, Ecole Normale Supérieure, Université de Yaoundé I, B.P. 47, Yaoundé, Cameroon 3. Géosciences-Environnement-Toulouse Unité Mixte de Recherche 5563, Observatoire Midi Pyrénées, Université Paul Sabatier, 14, avenue édouard-Belin, 31400, Toulouse, France |
| Abstract: | The Mbengwi recent magmatic formations consist of volcanics and syenites belonging to the same magmatic episode. Lavas form a bimodal basanite-rhyolite alkaline series with a gap between 50 and 62?wt.% SiO2. Mafic lavas (basanite-hawaiite) are sodic while felsic rocks (trachyte-rhyolite-syenites) are sodi-potassic, slightly metaluminous to peralkaline. The geochemical and isotopic characteristics (0.7031?87Sr/86Sr)initial?Ndi? |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |