• 作者：Fosso ; Jacob ; M??nard ; Jean-Jacques ; Bardintzeff ; Jacques-Marie ; Wandji ; Pierre ; Tchoua ; F??lix M. ; et. al.
• 关键词：Ligne du Cameroun ; Volcan du mont Bangou ; ????oc????ne ; Datation ⁴⁰Kaaa⁴⁰Ar ; Magmatisme transitionnel ; Magmatisme alcalin ; Cameroon Line ; Mount Bangou volcano ; Eocene ; ⁴⁰Kaaa⁴⁰Ar dating ; Transition
• 刊名：Comptes rendus - Geoscience
• 出版年：2005
• 出版时间：February, 2005
• 年：2005
• 卷：337
• 期：3
• 页码：315-325
• 全文大小：346 K

Mount Bangou, an Eocene volcano (⁴⁰K–⁴⁰Ar ages between 44.7 and 43.1 ± 1 Ma) is the oldest dated volcano of the Cameroon Line. In this region, two magmatic series, evolving by fractional crystallization, show transitional affinities that are exceptionally known in this sector. Mineral compositions of basaltic rocks (scarce modal olivine and occurrence of normative hypersthene) as well as geochemical characteristics (low Ba, La, Ta contents and high Y/Nb ratios) are in agreement with this trend. The succession of magmas evolving in time from transitional to more typical alkaline compositions is evidenced in a continental setting. To cite this article: J. Fosso et al., C. R. Geoscience 337 (2005).