S
Sylvain Blais
Researcher at University of Rennes
Publications - 29
Citations - 775
Sylvain Blais is an academic researcher from University of Rennes. The author has contributed to research in topics: Archean & Fractional crystallization (geology). The author has an hindex of 16, co-authored 29 publications receiving 737 citations. Previous affiliations of Sylvain Blais include European University of Brittany.
Papers
More filters
Journal ArticleDOI
Trace element geochemistry and petrogenesis of Finnish greenstone belts.
Journal ArticleDOI
U-Pb and Rb-Sr systematics of the Suomussalmi Archean greenstone belt (Eastern Finland)
TL;DR: The greenstone belt of Suomussaimi is composed of a lower volcanic sequence of komatiitic and tholeiitic composition, a middle sedimentary unit and a upper volcanic sequence that is mainly andesitic-rhyodacitic in composition as discussed by the authors.
Journal ArticleDOI
The size of plume heterogeneities constrained by Marquesas isotopic stripes
Catherine Chauvel,René C. Maury,Sylvain Blais,Eric Lewin,Hervé Guillou,Gérard Guille,Philippe Rossi,Marc-André Gutscher +7 more
TL;DR: In this paper, the authors present new Sr, Nd, Pb, Hf and Hf isotopes as well as trace element data on lavas from several Marquesas Islands and demonstrate that this archipelago consists of two adjacent and distinct rows of islands with significantly different isotopic compositions.
Journal ArticleDOI
Origin of Exceptionally Abundant Phonolites on Ua Pou Island (Marquesas, French Polynesia): Partial Melting of Basanites Followed by Crustal Contamination
Christelle Legendre,René C. Maury,Martial Caroff,Hervé Guillou,Joseph Cotten,Catherine Chauvel,Claire Bollinger,Christophe Hémond,Gérard Guille,Sylvain Blais,Philippe Rossi,Dominique Savanier +11 more
TL;DR: In this article, the authors estimate that tephriphonolitic magmas cover 65% of the surface of Ua Pou, whereas mafic lavas cover 27% and intermediate ones 8%.
Journal ArticleDOI
Age progression along the Society hotspot chain (French Polynesia) based on new unspiked K-Ar ages
Hervé Guillou,René C. Maury,Sylvain Blais,Joseph Cotten,Christelle Legendre,Gérard Guille,Martial Caroff +6 more
TL;DR: In this paper, K-Ar dates of volcanic rocks from five of the nine islands of the Society Archipelago (Moorea, Huahine, Raiatea, Bora Bora and Maupiti) confirm a Pacific plate velocity of around 11 cm/a during the last 4.3 m.y.