 | | Journal (article/letter/editorial) | | volcanism in the Upper Benue valley, northern Cameroon (Central Africa) Received: 16 June 2002 / Accepted:...mean) occur in the Upper Benue valley, northern Cameroon (Central Africa). The complete alkaline series...both the continental and oceanic sectors of the Cameroon Line. The Upper Benue valley basaltic magmas (87Sr/86Sr0...Garoua rift is the N120E–130E propagation in Cameroon of the Yola branch and is limited by strike-slip...valley. The Cameroon Line, a succession of horsts and rifts (rift names in italic), the Adamawa horst, the |  | Sharygin, V.V., Kóthay, K., Szabó, Cs., Timina, T.Ju., Török, K., Vapnik, Ye., Kuzmin, D.V. (2011) Rhönite in alkali basalts: silicate melt inclusions in olivine phenocrysts. Russian Geology and Geophysics, 52 (11) 1334-1352 doi:10.1016/j.rgg.2011.10.006 | Journal (article/letter/editorial) | | (Russia), Bakony-Balaton Highland, NógrádGömör Region (Hungary) and Makhtesh Ramon (Israel). Rhönite-bearing...occurrences and origins Association Genesis Locality/region Reference Miaskitic alkaline Si-undersaturated...De Ignacio et al., 2010; Kogarko et al., 2005 Cameroon Nono et al., 1994 Daughter phase of silicate...and Velde, 1976 Armenia Gushchin et al., 1991 Cameroon Nono et al., 1994 Spain Gil-Crespo et al.,...plateau volcanic field (UPVF), Transbaikalia, Russia Volcano Pravyi Lurbun Ol nephelinite Extrusion Nizhnii |  | LEGENDRE, C., MAURY, R. C., CAROFF, M., GUILLOU, H., COTTEN, J., CHAUVEL, C., BOLLINGER, C., HÉMOND, C., GUILLE, G., BLAIS, S., ROSSI, P., SAVANIER, D. (2005) Origin of Exceptionally Abundant Phonolites on Ua Pou Island (Marquesas, French Polynesia): Partial Melting of Basanites Followed by Crustal Contamination. Journal of Petrology, 46 (9) 1925-1962 doi:10.1093/petrology/egi043 | Journal (article/letter/editorial) | | this tholeiitic unit located at the base of the volcano pile (at its northeastern edge) is the oldest exposed...clasts in some diatremes from the Miocene Dunedin volcano (New Zealand) range from 56% to almost 100% (Price...absent from Ua Pou. In addition, Ua Pou and Dunedin volcano display particularly striking similarities: these...phonolitic materials, have been recognized in Dunedin volcano (Price & Chappell, 1975). In Tenerife, the Upper...ilmenite; usp, ulvöspinel; neph., nepheline; sod., sodalite; An, anorthite; anor, anorthoclase; aenig, aenigmatite; |  | | Report (issue) | | (Bottom) Carbonatite lava at Oldoinyo Lengai volcano, northern Tanzania. Courtesy Alexander J. Teague...and natrocarbonatite lavas at Oldoinyo Lengai volcano, Tanzania. . . . . . . . . . . . . . . . . . ....Hanley, Terry M. Seward, and Frederik Reutten 9. Cameroon Line alkaline magmatism (central Africa): A reappraisal...fingerprints of mantle metasomatism beneath Nyos volcano (Cameroon volcanic line) . . . . . . . . . . . . . ...40Ar-39Ar ages and petrogenesis of the Massif d’Ambre volcano, northern Madagascar . . . . . . . . . . . . . |
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