U-Th-rich zircon, thorite and allanite-(Ce) as a main carriers of radioactivity in the highly radioactive ultrapotassic melasyenite porphyry from the Šumava Mts., Moldanubian Zone, Czech Republic

Warning

This publication doesn't include Faculty of Arts. It includes Faculty of Science. Official publication website can be found on muni.cz.
Authors

ŽÁČEK Vladimír ŠKODA Radek SULOVSKY Petr

Year of publication 2009
Type Article in Periodical
Magazine / Source Journal of Geosciences
MU Faculty or unit

Faculty of Science

Citation
Field Geology and mineralogy
Keywords melasyenite porphyry; radioactivity; zircon; thorite; allanite-(Ce); Moldanubicum; Bohemian Massif
Description A melasyenite porphyry from the vicinity of Kašperské Hory (the Šumava Mts., Moldanubian Zone) shows a high natural radioactivity (K = 4.4-6.1 wt. %, eU = 15-24 ppm, eTh = 38-49 ppm). The most important carriers of U and Th are zircon, thorite, allanite-(Ce) and scarce monazite. Most of the zircon and thorite grains are altered by post-magmatic processes of due to which especially the zircon shows a large degree of chemical variability.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.