The Cameroon Hot Line (CHL): A unique example of active alkaline intraplate structure in both oceanic and continental lithospheres
作者： Bernard Déruelle , Ismaïla Ngounouno , Daniel Demaiffe
DOI: 10.1016/J.CRTE.2007.07.007
关键词: Geochemistry 、 Metasomatism 、 Felsic 、 Geology 、 Igneous differentiation 、 Gabbro 、 Basalt 、 Continental crust 、 Fractional crystallization (geology) 、 Igneous rock
摘要: The Cameroon Hot Line (CHL) is an active N30°E tectono-magmatic alignment, extending from Pagalu Island to Lake Chad. Its oceanic sector comprised of six major volcanoes, and the continental seven numerous monogenic cones more than sixty plutonic anorogenic ring complexes. lavas rocks have typical mineralogy alkaline series. Nephelinites lamprophyres are also present. basalts sectors similar trace elements Sr Nd isotope compositions, attesting that source sublithospheric crust plays no significant role in magma genesis. Uncommon intermediate originate through mixing between basaltic felsic magmas. evolution phonolitic magmas explained crystal fractionation. Compositions most trachytes rhyolites require a crustal component. Metasomatism carbonatitic affinity affected lithospheric mantle during ascent. DM FOZO components were involved genesis CHL parental
ulb.ac.be
harvard.edu
core.ac.uk
archives-ouvertes.fr
em-consulte.com
elsevier.com参考文章(60)
A. D. Saunders, M. J. Norry, Magmatism in the Ocean Basins ,(1989)
E. Ball, D. Soba, J.-M. Dautria, M. Girod, Estimation de la profondeur du Moho sous le Massif volcanique de l'Adamoua (Cameroun), à partir de l'étude d'enclaves de lherzolite Comptes-rendus des séances de l'Académie des sciences. Série 2, Mécanique-physique, chimie, sciences de l'univers, sciences de la terre. ,vol. 298, pp. 699- 704 ,(1984)
B. Déruelle, C. Moreau, C. Nkoumbou, R. Kambou, J. Lissom, E. Njonfang, R. T. Ghogomu, A. Nono, The Cameroon Line: A Review Springer, Berlin, Heidelberg. pp. 274- 327 ,(1991) , 10.1007/978-3-642-73966-8_12
R. T. Lubala, A. B. Kampunzu, Magmatism in extensional structural settings : the Phanerozoic African Plate Springer-Verlag. ,(1991)
Andreas Stracke, Albrecht W. Hofmann, Stan R. Hart, FOZO, HIMU, and the rest of the mantle zoo Geochemistry Geophysics Geosystems. ,vol. 6, ,(2005) , 10.1029/2004GC000824
R. Caldeira, J.M. Munhá, Petrology of ultramafic nodules from São Tomé Island, Cameroon Volcanic Line (oceanic sector) Journal of African Earth Sciences. ,vol. 34, pp. 231- 246 ,(2002) , 10.1016/S0899-5362(02)00022-2
Raymond Montigny, Ismaïla Ngounouno, Bernard Déruelle, Âges KAr des roches magmatiques du fossé de Garoua (Cameroun) : leur place dans le cadre de la « Ligne du Cameroun » Comptes Rendus Geoscience. ,vol. 336, pp. 1463- 1471 ,(2004) , 10.1016/J.CRTE.2004.08.005
Alex N. Halliday, Jon P. Davidson, Peter Holden, Charles DeWolf, Der-Chuen Lee, J. Godfrey Fitton, Trace-element fractionation in plumes and the origin of HIMU mantle beneath the Cameroon line Nature. ,vol. 347, pp. 523- 528 ,(1990) , 10.1038/347523A0
D.G Nkouathio, J.-J Ménard, P Wandji, J.-M Bardintzeff, The Tombel graben (West Cameroon): a recent monogenetic volcanic field of the Cameroon Line Journal of African Earth Sciences. ,vol. 35, pp. 285- 300 ,(2002) , 10.1016/S0899-5362(02)00031-3
Jayson B. Meyers, Bruce R. Rosendahl, Christopher G.A. Harrison, Zan-Dong Ding, Deep-imaging seismic and gravity results from the offshore Cameroon Volcanic Line, and speculation of African hotlines☆ Tectonophysics. ,vol. 284, pp. 31- 63 ,(1998) , 10.1016/S0040-1951(97)00173-X