Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Cathodoluminescence of rock-forming minerals and fossils using spectrometry
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Cold-stage cathodoluminescence spectra from various geological units of Bohemian Massif, prevalently of rock-forming minerals from silicate rocks of the Moldanubian zone, are presented. Apatite spectra are dominated by broad emission band of Mn2+, narrow peaks of REE, or both. In spectra of biogenic phosphate only REE-related peaks are important. Feldspar spectra are relatively simple, with no evidence for exotic admixtures, like Cr or Ti. CL is also effective tool for documentation of plagioclase alteration, including the frequent replacement of plagioclase by K-feldspar, or damage related to alpha-irradiation. Zircon has REE-induced green (bluish) luminescence in Ca-rich rocks, but usually no CL of zircon was observed in rocks where it is abundant (granites, durbachites, paragneisses, and granulites). Scheelite occurs (though usually in very small amount) in surprisingly large number of rocks with medium to high Ca content.References
