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  • 1970-1974  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Sur la présence de tholéiites à l'île Saint-Paul (Océan Indien) (1971)
    Springer
    Contributions to mineralogy and petrology 33 (1971), S. 108-117 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The basalts and dolerites from Saint-Paul island, located on the east section of the Indian ridge, are reinvestigated. New chemical rock analysis show that they are caracterized by high Fe, low Mg, and various Al contents; they belong to quartz tholeiites and olivine tholeiites of Yoder and Tilley's classification. Two clinopyroxene analysis allow to confirm this tholeiitic relationship. Compared with abyssal tholeiites, those of Saint-Paul are dissimilar in respect to Al2O3/CaO and FeO/MgO ratios, Sr and Rb contents (231–308 ppm and 6 to 29 ppm respectively) and 87 Sr/86 Sr values (0,7041–0,7065). Bearing in mind the structural position of the island, this differences are discussed in light of experimental data. Saint-Paul's basalts and dolerites are products a magma fractionated according to a Fernner trend and probably issued from deeper part of the upper mantle than abyssal tholeiites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386109
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nature et origine des „andésites“ et „trachyandésites“ cénozoiques du Massif Central Français (1972)
    Springer
    Contributions to mineralogy and petrology 36 (1972), S. 315-328 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The intermediate lavas (“andesites, trachyandesites, doreites, sancyites”) of the Cenozoïc volcanic districts of the Massif Central (France) are compared with lavas of the alkaline and calc-alkaline suites. On ground of mineralogical and chemical data, two groups may be recognized. The rocks of the first group bear a close resemblance with the intermediate rocks that result of the differentiation of an alkaline basaltic magma. The rocks of the second group, less numerous, possess one or several characters identical to those of calc-alkaline andesites. The contamination suffered by some lavas of both groups has not been sufficient to blot out their comagmatic characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00444338
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A propos des ≪andésites≫ des Açores (1972)
    Springer
    Contributions to mineralogy and petrology 35 (1972), S. 159-167 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The intermediate lavas of the Azores Archipelago are reinvestigated and compared with other lavas from oceanic islands. Using both published and new petrological data, it appears that the so-called andesites and latites are in fact hawaiites and tristanites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00370926
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    Paper (German National Licenses)
    Fulltext
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