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作者:Sylvain Blais , Céline Liorzou
来源:[J].Journal of Volcanology and Geothermal Research(IF 2.193), 2014, Vol.276, pp.173-188
摘要:Abstract(#br)The temporal evolution and geochemical evolution of Marquesas hotspot volcanoes have often been interpreted with reference to the Hawaiian model, where a tholeiitic shield-building stage is followed by an alkali basaltic post-shield stage, followed after a 0.4 t...
作者:... Gérard Guille , Sylvain Blais , Philippe Rossi
来源:[J].Journal of Volcanology and Geothermal Research(IF 2.193), 2004, Vol.143 (4), pp.293-317
摘要:Abstract(#br)The Nuku Hiva Pliocene island (Marquesas, French Polynesia) is composed of a large half-collapsed tholeiitic shield volcano (the Tekao edifice), the caldera of which is filled up by the younger Taiohae volcano. The latter edifice is characterised by a complex magmati...
作者:... Christelle Legendre , Gérard Guille , Sylvain Blais
来源:[J].Journal of Volcanology and Geothermal Research(IF 2.193), 2006, Vol.158 (3), pp.269-280
摘要:Abstract(#br)It has been proposed recently that large-scale caldera-like structures may result from the viscous lateral spreading of a hydrothermal system located in the central part of volcanic edifices. For this to occur, an unbutressed boundary resulting in reduced latera...
作者:... Joseph Cotten , Sylvain Blais , Gérard Guille
来源:[J].LITHOS(IF 3.779), 2006, Vol.96 (3), pp.524-542
摘要:Abstract(#br)This paper reports new field observations and new petrological, textural and geochemical data on two gabbroic intrusions and one pegmatoid dyke from the French Polynesian islands Maupiti and Bora Bora, respectively. Olivine crystals from the Faataufi and Barque de Hi...
作者:Sylvain Blais , Hervé Guillou
来源:[J].Terra Nova(IF 2.83), 2006, Vol.18 (3), pp.210-216
摘要:Abstract(#br)The atypical age/distance to the hotspot relationships observed for the Marquesas linear chain, which present a considerable scatter, are best explained considering (1) a Pacific plate motion of 10.5 cm yr−1 in the N115°E direction and (2) rejuvenatio...
作者:Sylvain Blais , Eric Lewin ...
来源:[J].Geochemistry, Geophysics, Geosystems(IF 2.939), 2012, Vol.13 (7), pp.n/a-n/a
摘要:The scale and geometry of chemical and isotopic heterogeneities in the source of plumes have important scientific implications on the nature, composition and origin of plumes and on the dynamics of mantle mixing over time. Here, we address these issues through the study of M...
作者:Sylvain Blais , Gérard Guille ...
来源:[J].Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science, 2000, Vol.331 (9), pp.579-585
摘要:Abstract(#br)Bora Bora island, located at the northwestern edge of the Society archipelago represents the upper part of a shield volcano made up of a pile of meter-thick alkali basalt flows and rare hawaiites. The summit caldera (4.4 km in diameter) is still recognisable and...
作者:Sylvain Blais , Hervé Martin , Pierre Jégouzo
来源:[J].Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science, 1997, Vol.325 (6), pp.397-402
摘要:Abstract(#br)The Archaean basement from eastern Finland is made up of a strongly migmatized lower unit (Kivijärvi) overthrusted by a migmatite-free upper unit (Naavala). This structure is interpreted as resulting from a continental collision. Between the two units discontinu...
作者:Sylvain Blais , Bernard Auvray ...
来源:[J].1987, Vol.24 (5), pp.953-966
摘要:Les coulées komatiitiques (laves ultramafiques dont la teneur en magnésium est supérieure à 18%) de la petite ceinture archéenne de roches vertes de Tipasjärvi (Finlande orientale) sont de deux types : (1) des coulées à microspinifex ne présentant pas de variation chimi...

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