Derivation of detrital rutile in the Yaoundé region from the Neoproterozoic Pan-African belt in southern Cameroon (Central Africa) |
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| Authors: | Henrik Stendal, Sadrack F lix Toteu, Robert Frei, Joseph Penaye, Urbain Olivier Njel, Jean Bassahak, Jean Nni, Boniface Kankeu, Vincent Ngako,Joseph Victor Hell |
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| Affiliation: | aGeological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, DK-1350 Copenhagen K, Denmark;bCentre for Geological and Mining Research, B.P. 333 Garoua, Cameroon;cGeological Institute, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark;dInstitute for Geological and Mining Research, B.P. 4110, Yaoundé, Cameroon |
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| Abstract: | Rutile, as an important component in alluvial or eluvial heavy mineral deposits, is known in southern Cameroon. These deposits are underlain by the Neoproterozoic low- to high-grade Yaoundé Group. Geochemical, thermometric, fluid inclusion and Pb isotopic studies of the rutile from alluvial and eluvial concentrates and from medium-grade micaschist from the nearby Yaoundé region permit the following conclusions: (1) alluvial and eluvial rutile of the Yaoundé region are derived from the degradation of metapelites, metamafic rocks and pegmatites of the nearby Yaoundé Group; (2) rutile in the Yaoundé Group formed during the Pan-African metamorphism, or was inherited as detrital rutile from a  900 Ma source. The study also shows that the rutile can be used to trace the history of the Pan-African belt north of the Congo craton. |
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| Keywords: | Pan-African Belt Rutile Yaoundé Group Cameroon Pb-isotopes |
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