Articles | Volume 36, issue 3
https://doi.org/10.5194/ejm-36-491-2024
https://doi.org/10.5194/ejm-36-491-2024
Research article
 | 
25 Jun 2024
Research article |  | 25 Jun 2024

Magmatic to solid-state evolution of a shallow emplaced agpaitic tinguaite (the Suc de Sara dyke, Velay volcanic province, France): implications for peralkaline melt segregation and extraction in ascending magmas

Thomas Pereira, Laurent Arbaret, Juan Andújar, Mickaël Laumonier, Monica Spagnoli, Charles Gumiaux, Gautier Laurent, Aneta Slodczyk, and Ida Di Carlo

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Cited articles

Ablay, G. J., Carroll, M. R., Palmer, M. R., Marti, J., and Sparks, R. S. J.: Basanite-phonolite lineage of the Teide-Pico Viejo Volcanic Complex, Tenerife, Canary Islands, J. Petrol., 39, 905–936, 1998. 
Allan, A. S., Morgan, D. J., Wilson, C. J., and Millet, M. A.: From mush to eruption in centuries: assembly of the super-sized Oruanui magma body, Contrib. Mineral. Petr., 166, 143–164, 2013. 
Arbaret, L., Diot, H., and Launeau, P.: Le suc phonolitique du Petit Gerbier (Velay, Massif Central); fabriques magnétiques et magmatique, C.R. Acad. Sci. Paris, 316, 1603–1610, 1993. 
Arbaret, L., Burg, J. P., Zeilinger, G., Chaudhry, N., Hussain, S., and Dawood, H.: Pre-collisional anastomosing shear zones in the Kohistan arc, NW Pakistan, Geol. Soc. Lond. Spec. Publ., 170, 295–311, 2000. 
Bachmann, O. and Bergantz, G. W.: On the origin of crystal-poor rhyolites: extracted from batholithic crystal mushes, J. Petrol., 45, 1565–1582, 2004. 
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Short summary
This work presents the results on deformation-enhanced melt segregation and extraction in a phonolitic magma emplaced at shallow depth in the Velay volcanic province (France). We provide evidence of the segregation and subsequent extraction of the residual melt during magma ascent and final emplacement. We highlight that melt segregation started by compaction as a loose packing of microlites emerged and continued with melt filling of a shear band network.