 | | Report (chapter) | | and Quaternary volcanism in the Massif Central, France Hilary Downes S U M M A R Y : Continental alkaline...crystallization. Removal of small quantities of sphene and zircon explains trace-element depletions in trachytes...Deves) and two central volcanoes (Mont-Dore and Cantal). Maars and diatremes are common, indicating interaction...Oligocene graben system. Subsequently the central volcano Cantal (112.5 Ma) and the plateau-forming fissure...Escandorgue and the eruption of the second central volcano Mont-Dore. The youngest activity (Recent) is in |  | | Journal (article/letter/editorial) | | pyroxenes in the Tertiary alkali basalts of the Cantal massif (French Massif Central) S. Pilet1 , J. Hernandez1...volcaniques, Universite P. et M. Curie, Paris, France Received February 2, 2001; revised version accepted...rocks of many magmatic alkaline provinces. In the Cantal massif, green-core pyroxenes occur in nearly all...percolation and the formation of GCPX observed in Cantal basalts. We propose that GCPX crystallized in a...and pyroxenes observed in the phonolites of the Cantal massif. Amphibolitic siliceous metasomatic veins |  | | Journal (article/letter/editorial) | | undersaturated alkaline volcanics, Cantal, Massif Central, France H. DOWNES Department of Geology, Birkbeck...mixing in the Puy Griou/Griounot area of the Cantal volcano (10 3 Ma). Petrographic evidence for injection...KEYWORDS:magma mixing, alkaline volcanics, Massif Central, France. Introduction IT is now widely accepted that magma...dominated by two late Tertiary central volcanoes, Cantal (10-3 Ma) and Mont Dore (2.5-0.25 Ma). In these...rhyolite magmas are well-known from the Mont Dore volcano and the Chaine des Puys. It is considered that |  | | Journal (article/letter/editorial) | | AND PRE-HERCYNIAN ORTHOGNEISSES, MASSIF CENTRAL (FRANCE) HILARY DOWNES and JEAN-LOUIS DUTHOU Department...de Clermont II, F-63038 Clermont Ferrand C6dex (France) (Accepted for publication December 29, 1987) ...and pre-Hercynian orthogneisses, Massif Central (France). Chem. Geol., 68: 291-308. The Cadomian-Hercynianbasement...Cadomian-Hercynianbasement of the Massif Central, France, contains both pre-metamorphic orthogneisses (600-410 Ma)...from the Hercynian basement of the Massif Central, France. The nature of the present-day lower crust of the |  | | Report (volume) | | and Quaternary volcanism in the Massif Central, France 517 KOGARKO, L. N. Alkaline rocks of the eastern...transitional basalts, and these typically form major volcano complexes and have associated felsic magmas. Such...geology, petrology and geochemistry of Caldeira volcano, Graciosa, Azores, and its bearing on contemporaneous...(unpublished). - - , J. G. & BAILEY, D. K. 1982. Caldeira volcano, Graciosa, Azores: Progress Report. J. geol. Soc...Province) c + 4.3 to + 34.1 0.056-1.28 Fiji - 13.4 -France (Massif Central) - 14.2 to 0 0.153-1.225 French |  | Kizovski, T.V., Izawa, M.R.M., Tait, K.T., Moser, D.E., Day, J.M.D., Hyde, B.C., White, L.F., Kovarik, L., Taylor, S.D., Perea, D.E., Barker, I.R., Joy, B.R. (2020) Petrogenesis, alteration, and shock history of intermediate shergottite Northwest Africa 7042: Evidence for hydrous magmatism on Mars?. Geochimica et Cosmochimica Acta, 283. 103-123 doi:10.1016/j.gca.2020.05.030 | Journal (article/letter/editorial) | | Scanning electron microscopy was carried out at the Zircon and Accessory Phase 148 Laboratory (ZAPLab) at...terrestrial basalt standards (Basalt Hawaiian Volcano Observatory (BHVO)-2, and Basalt 228 Columbia... 457 localities including: the Cantal volcano lava plateaus (France), basalt flows, gabbros, and 458...Vapor-differentiation effects in the Bouzentès lava flow (Cantal, France). J. Volcanol. Geotherm. Res. 79, 47–61. Caroff...conundrum using microbaddeleyite and launch-generated zircon. Nature 499, 454–7. Noguchi T., Nakamura T., Misawa |  | | Book | | Mineralogical Society of America (Fig. 6.6), Montserrat Volcano Observatory (Fig. 7.4a and the front cover image)...previously erupted products the hazard presented by a volcano to surrounding communities; • investigating magma...chamber that originally lay 5 km below an active volcano (but whose contents – or erupted products – are...alkali basalts that have erupted at later stages of volcano development. To show how this can be applied, the...accelerates the melt upward; vesiculation in a volcano vent therefore promotes lava fountaining at the |  | | Book (edition) | | Typhon is buried under Etna volcano. Whenever the giant stirs, the volcano erupts violently. Eighteenth...Science, New Zealand Stephen R. McNutt Alaska Volcano Observatory and University of Alaska Fairbanks...Hazard from Lahars and Jökulhlaups Synthesis of Volcano Monitoring 973 1121 John B. Murray, Hazel Rymer...McNutt Impacts of Eruptions on Human Health Volcano Warnings Volcanic Crises Management Peter J. Baxter...Related Phreatomagmatic Eruptions Synthesis of Volcano Monitoring 495 1165 Volcanic Lakes Volcanic Materials |
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