TY - JOUR
T1 - 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
AU - Toteu, Sadrack Felix
AU - Fouateu, Rose Yongue
AU - Penaye, Joseph
AU - Tchakounte, Jacqueline
AU - Mouangue, Aubin Ciriaque Seme
AU - van Schmus, William Randall
AU - Deloule, Etienne
AU - Stendal, Henrik
PY - 2006/4
Y1 - 2006/4
N2 - 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.
AB - 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.
KW - Cameroon
KW - Central Africa
KW - Nappe tectonics
KW - Pan-African
KW - Plutonism
KW - Zircon dating
UR - https://www.scopus.com/pages/publications/33646480772
U2 - 10.1016/j.jafrearsci.2005.11.015
DO - 10.1016/j.jafrearsci.2005.11.015
M3 - Article
SN - 1464-343X
VL - 44
SP - 479
EP - 493
JO - Journal of African Earth Sciences
JF - Journal of African Earth Sciences
IS - 4-5
ER -