RB-SR, PB-PB, U-PB DATING IN THE BANDJA P LUTONIC SERIES OF WESTERN CAMEROON

Authors
TCHANKAM CN VIALETTE Y
Citation
Cn. Tchankam et Y. Vialette, RB-SR, PB-PB, U-PB DATING IN THE BANDJA P LUTONIC SERIES OF WESTERN CAMEROON, Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre, 319(3), 1994, pp. 317-324
Citations number
21
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre → ACNP
ISSN journal
07644450
Volume
319
Issue
3
Year of publication
1994
Part
2
Pages
317 - 324
Database
ISI
SICI code
0764-4450(1994)319:3<317:RPUDIT>2.0.ZU;2-0
Abstract
The results of U-Pb zircon and Pb-Pb on minerals and whole rocks are r eported on a charnockite syn-D1 from the Bandja series in the western Cameroon. Data are interpreted as representing a plutonic emplacement at 640 Ma. A syn- to post-tectonic pluton is dated at 557 +/- 8 Ma (Rb -Sr whole rocks isochron). These results confirm the Pan-African age o f the charnockitic intrusive body. Initial isotopic Sr-87/Sr-86 ratios of charnockite (0.709) and granite (0.7089) show the importance of cr ustal imprint in the magma genesis.