T. Iizuka, T. Yamaguchi, Y. Hibiya, and Y. Amelin, Meteorite zircon constraints 594 on the bulk Lu?Hf isotope composition and early differentiation of the Earth, Proceedings of 595 the National Academy of Sciences, vol.112, pp.5331-5336, 2015.

S. E. Jackson, N. J. Pearson, W. L. Griffin, and E. A. Belousova, The 597 application of laser ablation-inductively coupled plasma-mass spectrometry to in situ U-Pb 598 zircon geochronology, Chemical Geology, vol.211, pp.47-69, 2004.

F. Kalfoun, D. Ionov, and C. Merlet, HFSE residence and Nb/Ta ratios in 600 metasomatised rutile-bearing mantle peridotites, Earth and Planetary Science Letters, vol.182, pp.1-601, 2002.

R. W. Kay and S. M. Kay, Delamination and delamination magmatism, p.603, 1993.

. Tectonophysics, , vol.219, pp.177-189

A. Lacroix, Minéralogie de la France et de ses colonies, Ch Béranger Ed. Tome 605 troisième, p.816, 1901.

J. Leterrier, R. Maury, P. Thonon, D. Girad, and M. Marchal, Clinopyroxene 607 composition as a method of identification of the magmatic affinities of paleoseries, p.608, 1982.

, Planetary Science Letters, vol.59, pp.139-154

A. Leyreloup, Le socle profond en Velay d'après les enclaves remontées par les 610 volcans néogènes -son métamorphisme et sa lithologie : granites et série charnockitique 611, vol.356, 1973.

Z. H. Li, M. Liu, and T. Gerya, Lithosphere delamination in continental collisional 613 orogens: A systematic numerical study, Journal of Geophysical Research, vol.121, pp.5186-5211, 2016.

K. R. Ludwig, User's manual for Isoplot/Ex Version 2.49, a geochronological 615 toolkit for Microsoft Excel, Berkeley Geochronological Center, vol.1, p.616, 2001.

U. Berkeley, , vol.55, p.pp

M. Lustrino, How the delamination and detachment of lower crust can 618 influence basaltic magmatism, Earth-EcienceReview, vol.72, pp.21-38, 2005.

J. Mergoil and P. Boivin, Le Velay, son volcanisme et les formations associées, 1993.

, Notice de la carte à 1/100 000. Géologie de la France, vol.3, pp.3-96

J. F. Moyen, J. L. Paquette, D. A. Ionov, A. Gannoun, A. V. Korsakov et al., , p.622

B. Moine, Paleoproterozoic rejuvenation and replacement of Archaean lithosphere: 623 evidence from zircon U-Pb dating and Hf isotopes in crustal xenoliths at Udachnaya, Siberian 624 craton, Earth and Planetary Science Letters, vol.457, pp.149-159, 2017.

E. K. Mullen, J. L. Paquette, J. H. Tepper, and I. S. Mccallum, Temporal and spatial 626 evolution of the Northern Cascade Arc magmatism revealed by LA-ICP-MS U-Pb zircon 627 dating, Canadian Journal of Earth Sciences, vol.55, pp.443-462, 2018.

J. L. Paquette and J. Mergoil-daniel, Origin and U-Pb dating of zircon-bearing 629, 2009.

, Contribution 630 to Mineralogy and Petrology, nepheline syenite xenoliths preserved in basaltic tephra, vol.158, pp.245-262

J. L. Paquette, R. P. Ménot, C. Pin, and J. B. Orsini, , p.632, 2003.

, granitic pulses in a post-collisional setting: evidence from precise U-Pb zircon dating through 633 a crustal cross-section in Corsica, Chemical Geology, vol.198, pp.1-20

J. L. Paquette, J. L. Piro, J. L. Devidal, V. Bosse, and A. Didier, Sensitivity 635 enhancement in LA-ICP-MS by N2 addition to carrier gas: application to radiometric dating of 636, 2014.

, U-Th-bearing minerals, Agilent ICP-MS journal, vol.58, pp.4-5

J. L. Paquette, D. A. Ionov, A. M. Agashev, A. Gannoun, and E. I. Nikolenko, Age, p.638, 2017.

, provenance and Precambrian evolution of the Anabar Shield from U-Pb and Lu-Hf isotope 639 data on detrital zircons, and the history of the northern and central Siberian craton

, Precambrian Research, vol.301, pp.134-144

J. L. Paquette, E. Médard, J. Francomme, P. Bachèlery, and J. M. Hénot, , p.642, 2019.

. Icp-ms-u/, Pb zircon timescale constraints of the Pleistocene latest magmatic activity in the 643

. Sancy, Journal of Volcanology and Geothermal 644 Research, vol.374, pp.52-61

J. L. Paquette, M. Huraiová, O. Nemec, A. Gannoun, K. ?arinová et al., , 2019.

, Origin and provenance of 2 Ma -2 Ga zircons ejected by phreatomagmatic eruptions of 647

, Pliocene basalts in southern Slovakia, International Journal of Earth Sciences, vol.108, pp.2607-648

P. J. Patchett and M. Tatsumoto, Hafnium isotope variations in oceanic basalts, 1980.

, Geophysical Research Letters, vol.7, pp.1077-1080

P. J. Patchett, O. Kouvo, C. E. Hedge, and M. Tatsumoto, Evolution of continental 652 crust and mantle heterogeneity: evidence from Hf isotopes. Contribution to Mineralogy, p.653, 1981.

. Petrology, , vol.78, pp.279-297

J. A. Pfänder, S. Jung, C. Münker, A. Stracke, and K. Mezger, , p.655, 2012.

, Nb/Ta reservoir in the continental lithospheric mantle and consequences on the global Nb 656 budget -Evidence from continental basalts from Central Germany, Geochimica et, p.657

, Cosmochimica Acta, vol.77, pp.232-251

C. Pin and D. Vielzeuf, Granulites and related rocks in variscan median Europe: a 659 dualistic interpretation, Tectonophysics, vol.93, pp.47-74, 1983.

C. Pin, J. L. Paquette, P. Monchoux, and T. Hammouda, First field-scale occurrence 661 of Si-Al-Na-rich low-degree partial melts from the upper mantle, Geology, vol.29, pp.451-454, 2001.

C. Pin, P. Monchoux, J. L. Paquette, B. Azambre, R. C. Wang et al., , 2006.

, France: a possible source for 664 corundum and alkali feldspar xenocrysts in basaltic terranes. II. Geochemical and petrogenetic 665 considerations, Igneous albitite dikes in orogenic lherzolites, western Pyrénées, vol.44, pp.843-856

S. Rakotosamizanany, G. Giuliani, D. Ohnenstetter, A. Fety, and M. Rakotondrazafy, , p.667

A. E. Fallick, J. L. Paquette, and M. Tiepolo, Chemical and oxygen isotopic compositions, 668 age and origin of gem corundums in Madagascar alkali basalts, Journal of African Earth, vol.669, 2014.

, Sciences, vol.94, pp.156-170

P. Rossi, A. Cocherie, C. M. Fanning, and E. Deloule, Variscan to eo-Alpine 671 events recorded in European lower crust zircons sampled from the French Massif Central, p.672, 2006.

F. Corsica, Lithos, vol.87, pp.235-260

S. Sakata, A practical method for calculating the U-Pb age of Quaternary 674 zircon: Corrections for common Pb and initial disequilibria, Geochemical Journal, vol.52, pp.1-6, 2018.

S. Sakata, S. Hirakawa, H. Iwano, T. Danhara, M. Guillong et al., A 676 new approach for constraining the magnitude of initial disequilibrium in Quaternary zircons 677 by coupled uranium and thorium decay series dating, Quaternary Geochronology, vol.37, pp.1-12, 2017.

E. Scherer, C. Münker, and K. Mezger, Calibration of the lutetium-hafnium clock, 2001.

, Science, vol.293, pp.683-687

B. Schott and H. Schmeling, Delamination and detachment of a lithospheric root, 1998.

. Tectonophysics, , vol.296, pp.225-247

A. K. Schmitt, M. Klizke, A. Gerdes, and C. Schäfer, Zircon Hafnium-Oxygen, vol.683, 2017.

, Isotope and Trace Element Petrochronology of Intraplate Volcanic Rocks from the Eifel 684 (Germany) and Implications for Mantle versus Crustal Origins of Zircon Megacrysts, Journal 685 of Petrology, vol.58, pp.1841-1870

Y. Shimizu, S. Arai, T. Morishita, H. Yurimoto, and F. Gervilla, Petrochemical 687 characteristics of felsic veins in mantle xenoliths from Tallante (SE Spain) : an insight into 688 activity of silicic melt within the mantle wedge, Transactions of the Royal society of 689 Edinburgh: Earth Sciences, vol.95, pp.265-276, 2004.

C. Simonet, Géologie des gisements de saphir et de rubis. L'exemple de la John 691, 2000.

. Saul-ruby-mine, , vol.349

F. L. Sutherland and C. M. Fanning, Gem-bearing basaltic volcanism, p.693, 2001.

, New South Wales: Cenozoic evolution, based on basalt K-Ar ages and zircon fission track 694 and U-Pb isotope dating, Australian Journal of Earth Sciences, vol.48, pp.221-237

F. L. Sutherland, P. W. Hoskin, C. M. Fanning, and R. R. Coenraads, Models of 696 corundum origin from alkali basalt terrains: a reappraisal. Contribution to Mineralogy, p.697, 1998.

. Petrology, , vol.133, pp.356-372

F. L. Sutherland, G. Bosshart, C. M. Fanning, P. W. Hoskin, and R. R. Coenraads, Sapphire crystallization, age and origin, Ban-Huai Sai, Laos: ages based on zircon 700 inclusions, Journal of Asian Earth Sciences, vol.20, pp.841-849, 2002.

F. L. Sutherland, J. M. Duroc-danner, and S. Meffre, Age and origin of gem 702 corundum and zircon megacrysts from the Mercaderes-Rio Mayo area, p.703, 2008.

, South America. Ore Geology Reviews, vol.34, pp.155-168

C. Sutthirat, V. Pisutha-arnond, P. Khamloet, and T. Assawincharoenkij, Multi 705 stages of original sapphire formation related to basaltic magmatism in the Bo Phloi basaltic 706 gem field, Journal of Asian Earth Sciences, vol.187, 2020.

F. Tera and G. J. Wasserburg, U-Th-Pb systematics in three Apollo 14 basalts and 709 the problem of initial Pb in lunar rocks, Earth and Planetary Science Letters, vol.14, pp.281-304, 1972.

S. Touron, C. Renac, S. Y. O'reilly, J. Cottin, and W. L. Griffin, , 2008.

, Characterization of the metasomatic agent in mantle xenoliths from Devès, Massif Central 712 (France) using coupled in situ trace-element and O, Sr and Nd isotopic compositions, p.713

M. Coltorti and M. Gregoire, Metasomatism in Oceanic and Continental Lithospheric, vol.714

, Mantle. Geological Society, vol.293, pp.177-196

B. G. Upton, R. W. Hinton, P. Aspen, A. Finch, and J. W. Valley, Megacrysts and 716 associated xenoliths: evidence for migration of chemically enriched melts in the upper mantle 717 beneath Scotland, Journal of Petrology, vol.40, pp.935-956, 1999.

E. Van-achterbergh, C. G. Ryan, S. E. Jackson, and W. L. Griffin, Data reduction 719 software for LA-ICP-MS. In Laser ablation-ICPMS in the earth science, 2001.

, Mineralogical Association of Canada, vol.29, pp.239-243

J. D. Vervoort, P. J. Patchett, U. Söderlund, and M. Baker, Isotopic composition of 722, 2004.

, Yb and the determination of Lu concentrations and Lu/Hf ratios by isotope dilution using 723

. Mc-icpms and . Geochemistry, Geophysics, Geosystems, vol.5, pp.1-15

E. B. Watson, Zircon saturation in felsic liquids: experimental data and 725 applications to trace element geochemistry. Contribution to Mineralogy and Petrology, vol.70, pp.407-419, 1979.

E. B. Watson and T. M. Harrison, Zircon saturation revisited: temperature and 728 composition effects in a variety of crustal magma types, Earth and Planetary Science Letters, vol.729, pp.295-304, 1983.

M. Wiedenbeck, P. Allé, F. Corfu, W. Griffin, M. Meier et al., , p.731

J. C. Roddick and W. Spiegel, Three Natural Zircon Standards for U-Th-Pb, Lu-Hf, Trace 732 Element and REE Analyses, Geostandards Newsletter, vol.19, pp.1-23, 1995.

B. Willemant and M. Treuil, Comportement des éléments traces et majeurs dans la 734, 1983.

M. Wilson and H. Downes, Tertiary-Quaternary extension-related alkaline 736 magmatism in Western and Central Europe, Journal of Petrology, vol.32, pp.811-849, 1991.

N. Wittig, J. A. Baker, and H. Downes, Dating the mantle roots of young 738 continental crust, Geology, vol.34, pp.237-240, 2006.

N. Wittig, J. A. Baker, and H. Downes, U-Th-Pb and Lu-Hf isotopic constraints on 740 the evolution of sub-continental lithospheric mantle, Geochimica et, p.741, 2007.

. Cosmochimicaacta, , vol.71, pp.1290-1311

Y. Xu, M. A. Menzies, J. Bodinier, R. M. Bedini, P. Vroon et al., Melt percolation and reaction atop a plume: evidence from the poikiloblastic peridotite 744 xenoliths from Borée, Contribution to Mineralogy and 745 petrology, vol.743, pp.65-84, 1998.

M. Yoshikawa, T. Kawamoto, T. Shibata, and J. Yamamoto, , 2008.

, Nd isotopic characteristics and pressure-temperature estimates of mantle xenoliths from the 748

, French Massif Central: evidence for melting and multiple metasomatism by silicate-rich 749

M. From:-coltorti, H. Downes, and M. Grégoire, , vol.750

, (eds) Petrological Evolution of the European Lithospheric Mantle, Geological, vol.751

L. Society, , vol.337, pp.153-175

N. A. Zangana, H. Downes, M. F. Thirlwall, and E. Hegner, Relationship between 753 deformation, equilibration temperatures, REE and radiogenic isotopes in mantle xenoliths 754 (Ray Pic, vol.127, pp.187-203, 1997.

, Figure 1. Geological sketch map of the sampled area. 1: Variscan basement; 2: Cenozoic 760 grabens and sedimentary basins; 3: Cenozoic and Quaternary volcanism

, TiO2 diagram (weight %) displaying the chemical composition of the 764 clinopyroxenes from the samples. b: FeOt vs. SiO2 diagram (weight %) displaying the 765 chemical composition of the orthopyroxenes from the samples. In both diagrams, the light and 766 dark gray arrays represent typical compositions of these minerals in granulite, p.767

, 1973) and mantle xenoliths (Chazot, unpublished data) from the Massif Central, respectively

, Scanning Electron Microscope and binocular microscope images of the zircon 770 crystals; A: subhedral zircons megacrysts from ESP-2 sample stream; B: fine oscillatory 771 zoning parallel to the zircon faces (ESP-2)

, D: sector-zoned and euhedralzircon crystal from the lava flow (ESP-1) partly 773 outlined by a fine alteration rim; E and F: sector zoned and rounded Pliocene zircons from the 774 lava flow, p.1

, G: oscillatory zoned and rounded Permian zircon from the lava flow (ESP-775 1), partly outlined by a fine alteration rim; H

, Figure 4. Tera and Wasserburg (1972) 238 U/ 206 Pb vs. 207 Pb/ 206 Pb diagrams of the dated 779 samples A: alluvium deposit from Les Brus stream (ESP-2), mugearite lava flow, p.780

, Pliocene zircons and C: Permian zircons