GEOTHERMAL WATER-ROCK ASSOCIATION IN THE MASSIF CENTRAL, FRANCE A. STETTLER 1 Laboratoire G~ochimie Cosmochimie...de la Terre, Universit~s de Paris 6-7, Paris 5 (France) Received October 1976 Revised version received...thermo-mineral waters from the Massif Central in France. Rocks and mineral fractions which are thought...MargueriteSt. Nectaire (Group B) in the Massif Central, France, were analyzed and compared with suitable wholerock... After sawing and crushing, the plagioclase, K-feldspar and biotite fractions were handpicked from the
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
Geological Society Special Publications Series Editor K. C 0 E GEOLOGICAL SOCIETY SPECIAL PUBLICATION ...Introduction: FITTON, J. G. & UPTON, B. G . J . BAILEY, D. K. Mantle metasomatism--perspective and prospect vii...and Quaternary volcanism in the Massif Central, France 517 KOGARKO, L. N. Alkaline rocks of the eastern...Springer-Verlag, Berlin. LARSEN,L. M., REX,D. C. & SECHER,K. 1983. The age of carbonatites, kimberlites and lamprophyres...Springer-Verlag, Berlin. LARSEN,L. M., REX,D. C. & SECHER,K. 1983. The age of carbonatites, kimberlites and lamprophyres
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...Al2O3 Fe2O3 (ferric) FeO (ferrous) MnO MgO CaO Na2O K 2O P 2 O5 H 2 O+ CO2 Total 48.3 2.591 13.03 6.84...light-coloured minerals Quartz Feldspars Plagioclase Alkali feldspar Feldspathoids Muscovite Mafic = dark = ferromagnesian