U-Pb dating of plutonic rocks involved in the nappe tectonic in southern Cameroon: consequence for the Pan-African orogenic evolution of the Central African fold belt

Sadrack Felix Toteu, Rose Yongue Fouateu, Joseph Penaye, Jacqueline Tchakounte, Aubin Ciriaque Seme Mouangue, William Randall van Schmus, Etienne Deloule, Henrik Stendal

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

111 Citationer (Scopus)

Abstrakt

TIMS-ID and SIMS U-Pb dating on zircons from metaplutonic rocks involved in the Pan-African nappe of southern Cameroon allow definition of three groups of subduction-related intrusions: group-I intrusions represented by the Masins metagabbro in the Lomie region yielded 666 ± 26 Ma; group-II intrusions represented by the Mamb metasyenogabbro and the Yaoundé pyriclasite yielded ca. 620 Ma and are broadly coeval with the deposition of the Yaoundé metasediments; group-III intrusions represented by the Elon augen metagranite and the Ngaa Mbappe metamonzodiorite yielded ca. 600 Ma. The onset of the nappe tectonics occurred under high-grade conditions in the range 616 to 610 Ma and continued around 600 Ma with the emplacement of the shallowest nappes. Finally, the construction of southern Cameroon proceeded by a multi-stage evolution characterized by a long-lived development of magmatic arcs associated with rapid opening and closure of sedimentary marginal basins in relation to a northward subduction.

OriginalsprogEngelsk
Sider (fra-til)479-493
Antal sider15
TidsskriftJournal of African Earth Sciences
Vol/bind44
Udgave nummer4-5
DOI
StatusUdgivet - apr. 2006

Programområde

  • Programområde 4: Mineralske råstoffer

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