Nature du manteau supérieur et processus métasomatiques de part et d'autre du Sillon Mouiller (Massif Central)

Olivier Alard; Jean Marie Dautria; Jean Louis Bodinier

Nature du manteau supérieur et processus métasomatiques de part et d'autre du Sillon Mouiller (Massif Central)

Translated title of the contribution: Nature of the upper mantle and metasomatic processes on either side of the Sillon Mouiller (French Massif Central)

Olivier Alard^*, Jean Marie Dautria, Jean Louis Bodinier

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

Peridotite xenoliths collected in two Mio-Pliocene volcanoes on either side of the Sillon Mouiller (French Massif Central) have contrasting characteristics. East of the Sillon Mouiller, the peridotites record anomalously high temperatures (1,250°C) and extensive reequilibration with basaltic melts. To the west, equilibrium temperatures are much lower (950"C) and the peridotites bear evidence for interaction with volatile-rich small melt fractions. In agreement with seismic tomographic data, these results indicate that the Massif Central lithospheric mantle is strongly affected by mantle plume upwelling to the east of the Sillon Mouiller, while this effect is moderate to the west.

Translated title of the contribution	Nature of the upper mantle and metasomatic processes on either side of the Sillon Mouiller (French Massif Central)
Original language	French
Pages (from-to)	763-770
Number of pages	8
Journal	Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes
Volume	323
Issue number	9
Publication status	Published - 1996
Externally published	Yes

Cite this

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title = "Nature du manteau sup{\'e}rieur et processus m{\'e}tasomatiques de part et d'autre du Sillon Mouiller (Massif Central)",

abstract = "Peridotite xenoliths collected in two Mio-Pliocene volcanoes on either side of the Sillon Mouiller (French Massif Central) have contrasting characteristics. East of the Sillon Mouiller, the peridotites record anomalously high temperatures (1,250°C) and extensive reequilibration with basaltic melts. To the west, equilibrium temperatures are much lower (950{"}C) and the peridotites bear evidence for interaction with volatile-rich small melt fractions. In agreement with seismic tomographic data, these results indicate that the Massif Central lithospheric mantle is strongly affected by mantle plume upwelling to the east of the Sillon Mouiller, while this effect is moderate to the west.",

keywords = "French Massif Central, Metasomatism, Sillon Mouiller, Trace element, Upper mantle",

author = "Olivier Alard and Dautria, {Jean Marie} and Bodinier, {Jean Louis}",

year = "1996",

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volume = "323",

pages = "763--770",

journal = "Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes",

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publisher = "Gauthier Villars Editeur",

number = "9",

}

Nature du manteau supérieur et processus métasomatiques de part et d'autre du Sillon Mouiller (Massif Central). / Alard, Olivier; Dautria, Jean Marie; Bodinier, Jean Louis.
In: Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes, Vol. 323, No. 9, 1996, p. 763-770.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Nature du manteau supérieur et processus métasomatiques de part et d'autre du Sillon Mouiller (Massif Central)

AU - Alard, Olivier

AU - Dautria, Jean Marie

AU - Bodinier, Jean Louis

PY - 1996

Y1 - 1996

N2 - Peridotite xenoliths collected in two Mio-Pliocene volcanoes on either side of the Sillon Mouiller (French Massif Central) have contrasting characteristics. East of the Sillon Mouiller, the peridotites record anomalously high temperatures (1,250°C) and extensive reequilibration with basaltic melts. To the west, equilibrium temperatures are much lower (950"C) and the peridotites bear evidence for interaction with volatile-rich small melt fractions. In agreement with seismic tomographic data, these results indicate that the Massif Central lithospheric mantle is strongly affected by mantle plume upwelling to the east of the Sillon Mouiller, while this effect is moderate to the west.

AB - Peridotite xenoliths collected in two Mio-Pliocene volcanoes on either side of the Sillon Mouiller (French Massif Central) have contrasting characteristics. East of the Sillon Mouiller, the peridotites record anomalously high temperatures (1,250°C) and extensive reequilibration with basaltic melts. To the west, equilibrium temperatures are much lower (950"C) and the peridotites bear evidence for interaction with volatile-rich small melt fractions. In agreement with seismic tomographic data, these results indicate that the Massif Central lithospheric mantle is strongly affected by mantle plume upwelling to the east of the Sillon Mouiller, while this effect is moderate to the west.

KW - French Massif Central

KW - Metasomatism

KW - Sillon Mouiller

KW - Trace element

KW - Upper mantle

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M3 - Article

AN - SCOPUS:0030439150

SN - 1251-8050

VL - 323

SP - 763

EP - 770

JO - Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes

JF - Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes

IS - 9

ER -

Nature du manteau supérieur et processus métasomatiques de part et d'autre du Sillon Mouiller (Massif Central)

Abstract

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