FN Archimer Export Format
PT J
TI Extreme source heterogeneity and complex contamination patterns along the Cameroon Volcanic Line: New geochemical data from the Bamoun plateau
BT 
AF Ziem A. BIDIAS, Luc Achille
   CHAZOT, Gilles
   MOUNDI, Amidou
   NONNOTTE, Philippe
AS 1:1,2;2:3;3:1;4:3;
FF 1:;2:;3:;4:;
C1 Univ Yaounde I, Fac Sci, Dept Sci Terre Univ, BP 812, Yaounde, Cameroon.
   Univ Yaounde I, Ecole Normale Super, Lab Geol, BP 047, Yaounde, Cameroon.
   Univ Brest UBO, Geosci Ocean, UMR 6538, IUEM, Pl Nicolas Copernic, F-29280 Plouzane, France.
C2 UNIV YAOUNDE, CAMEROON
   UNIV YAOUNDE, CAMEROON
   UBO, FRANCE
UM LGO
IF 1.84
TC 11
UR https://archimer.ifremer.fr/doc/00638/74996/75730.pdf
LA English
DT Article
DE ;Cameroon Volcanic Line;Geochemistry;Mantle source;Crustal contamination;Basalt
AB We investigated mafic and felsic volcanic rocks from the Bamoun plateau, a magmatic province located north of Mount Cameroon, in the continental part of the Cameroon Volcanic Line (CVL). Basalts and dacites were probably emplaced more than 40 Ma ago, while basanites represent very young volcanic eruptions. Among the basalts, some of them have suffered crustal contamination during their uprise through the continental crust, and their primary trace element and isotopic compositions have been slightly modified. The formation of the dacites was also accompanied by some crustal contamination. Non-contaminated rocks show that the oldest magmas are transitional basalts formed by relatively high degrees of partial melting of a moderately enriched mantle source, probably containing pyroxenites. Recent basanites were produced by very low partial melting degrees of an enriched mantle source with HIMU composition, but different from the source of the nearby Mount Cameroon lavas. The mantle beneath the CVL is thus very heterogeneous, and the tendency towards more alkaline mafic-ultramafic compositions in the youngest volcanic manifestations along the CVL seems to be a general feature of all CVL. 
PY 2018
PD MAR
SO Comptes Rendus Geoscience
SN 1631-0713
PU Elsevier France-editions Scientifiques Medicales Elsevier
VL 350
IS 3
UT 000427804400002
BP 100
EP 109
DI 10.1016/j.crte.2017.11.004
ID 74996
ER

EF