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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Mineralogy and petrology 16 (1971), S. 156-172 
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Summary A new occurence of orbiculitic rocks from the Western Zillertal Alps is investigated. The orbicules consist of a core and a shell. The core is poor in potassium feldspar and rich in quartz and biotite. The shell consists mainly of potassium feldspar. Three chemical analyses. The shell consists mainly analyses, and thirty-one modal analyses were carried out. It is concluded that the orbicules have been derived from xenoliths by a partial melting process.
    Notes: Zusammenfassung In migmatischen Gneisen der westlichen Zillertaler Alpen treten Aplitgranitgänge mit kugelgranitartigem Gefüge auf. Die kugeligen Gebilde bestehen aus einem nahezu kalifeldspatfreien, aber sehr biotit- und quarzreichen Kern und einer kalifeldspatreichen Schale. Zur Untersuchung der kugeligen Gebilde wurden drei chemische Analysen, 31 Modalanalysen und einige Mineralanalysen mit der Mikrosonde durchgeführt. Die kugeligen Gebilde werden als umgewandelte und teilweise aufgeschmolzene Nebengesteinsaufschlüsse gedeutet.
    Type of Medium: Electronic Resource
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