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

ŽÁČEK, Vladimír, Radek ŠKODA and Petr SULOVSKY. 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. Journal of Geosciences. 2009, vol. 54, No 4, p. 343-354. ISSN 1802-6222.

Basic information

• Original name: 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
• Authors: ŽÁČEK, Vladimír (203 Czech Republic), Radek ŠKODA (203 Czech Republic, guarantor) and Petr SULOVSKY (203 Czech Republic).
• Edition: Journal of Geosciences, 2009, 1802-6222.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10500 1.5. Earth and related environmental sciences
• Country of publisher: Czech Republic
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/09:00028860
• Organization unit: Faculty of Science
• UT WoS: 000207803200003
• Keywords in English: melasyenite porphyry; radioactivity; zircon; thorite; allanite-(Ce); Moldanubicum; Bohemian Massif
• Tags: International impact, Reviewed

Abstract

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.

Links

• KJB301630801, research and development project: Name: Interakce metamiktních minerálů s hydrotermálnímy fluidy a její význam geologickém prostředí

Investor: Academy of Sciences of the Czech Republic, The interaction of metamict minerals and hydrothermal fluids and its significance in the geological environment