Journal
JOURNAL OF AFRICAN EARTH SCIENCES
Volume 44, Issue 4-5, Pages 479-493Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jafrearsci.2005.11.015
Keywords
zircon dating; platonism; nappe tectonics; Pan-African; Cameroon; Central Africa
Categories
Ask authors/readers for more resources
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 Yaounde pyriclasite yielded ca. 620 Ma and are broadly coeval with the deposition of the Yaounde 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. (c) 2005 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available