@article{jgg2017511,
author={{Pierre, Wotchoko and Guimollaire, Nkouathio David and Djibril, Kouankap Nono Gus and Vohnyui, Chenyi Marie-Louise and Suh, Guedjeo Christian and Tangie, Bulam Annyta and dieudonne, Tchokona Seuwui and Yannick, Seplong},
title={Petrogenesis of Lava from Wainama West, Mount Oku (CVL): Source Characterization and Magma Evolution},
journal={Journal of Geosciences and Geomatics},
volume={5},
number={1},
pages={1--11},
year={2017},
url={http://pubs.sciepub.com/jgg/5/1/1},
issn={2373-6704},
abstract={The Wainama West area belongs to the Cameroon volcanic Line (CVL). Three petrographic types of lavas are identified: basanites, trachytes and rhyolites. Basanites with porphyritic texture are made up of minerals: plagioclase, clinopyroxene, olivine phenocrysts and opaque minerals within a groundmass; trachytes with microlitic-porphyritic texture are composed of phenocrysts of sanidine, hornblende, plagioclases, pyroxene and opaque minerals enclosed in a fine groundmass showing a preferred orientation. Rhyolite shows a microlitic-porphyritic texture made up of quartz, sanidine and opaque minerals in the groundmass. According to their geochemical behaviour, major elements show an enrichment in SiO<SUB>2</SUB> (42.7每70.7 wt.%), Al<SUB>2</SUB>O<SUB>3</SUB> (13.7每16.6 wt.%), Na<SUB>2</SUB>O (2.3每6.3 wt.%), K<SUB>2</SUB>O (1.3每4.9 wt.%) and an impoverishment in MgO (8.3每0.02 wt.%) and CaO (10.0每0.5 wt.%) from basanite to rhyolite. Some binary diagrams indicate a good correlation with some minor elements (Cr, Ba, Zr, Sr, Rb, and Nb) against SiO<SUB>2</SUB>. REE patterns of the rocks are characterized by a negative anomaly in Eu (0.3<img src=image/abs1.png></img>Eu/Eu*<img src=image/abs2.png></img>0.4) in basanite and weak negative anomaly in Eu (0.1<img src=image/abs3.png></img>Eu/Eu*<img src=image/abs4.png></img>0.2) from trachytes to rhyolites, with parallel profiles. The Wainama West lavas are found to have originated from a single primary melt similar to that of OIB and the continental basalt but with slightly higher Nb/Ta content. From the Dy/Yb vs La/Yb diagrams, the major processes resulting to the generation of this primary melt is the partial melting of garnet peridotite, of the high degree (11-12%). The Wainama West alkali lavas were formed in intraplate setting of continental part of the CVL.},
doi={10.12691/jgg-5-1-1}
publisher={Science and Education Publishing}
}