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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Mineralogy and petrology 70 (2000), S. 221-234 
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Zusammenfassung Die Ba-SEE Fluorkarbonate Cebait, Huangoit und Cordylit kommen in einem Karbonatitgang bei Bayan Obo, Innere Mongolei, Nord-China, vor. Ihre chemische Zusammensetzung, SEE-Verteilungsmuster und syntaktische Verwachsungsbeziehungen werden vorgestellt. Letztere wurden mit Mikrosonden-Rastermethoden untersucht und im Zusammenhang mit der Abkühlungsgeschichte des Karbonatit-Magmas oder eventueller späterer Ereignisse interpretiert. Die SEE-Verteilungsmuster der Ba-SEE Fluorkarbonate im Gang ähneln denen entsprechender Minerale im Dolomit-Marmor in dem die Großlagerstätte Bayan Obo aufsitzt; dies weist darauf hin, dass beide kogenetisch sein koönnten.
    Notes: Summary The new occurrence in a carbonatite dyke at Bayan Obo, Inner Mongolia, North China, of the Ba-REE fluorocarbonate minerals cebaite, hunghoite and cordylite is presented, together with their chemical composition, rare earth element (REE) patterns, and syntaxial intergrowth relationships. These syntaxial textures, investigated by scanning and electron microprobe techniques, are interpreted in terms of the cooling history during the late-stage crystallization of the carbonatite magma or possible later events. The REE distribution patterns of the Ba-REE fluorocarbonate minerals in the dyke are similar to those of the corresponding minerals in the dolomite marble that hosts the giant REE-Nb-Fe ore body at Bayan Obo, providing evidence that the two may be cogenetic.
    Type of Medium: Electronic Resource
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