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The involvement of F CO.sub.2./sub., and As in the alteration of Zr-Th-REE-bearing accessory minerals in a the Hora Svaté Kateřiny A-type granite, Czech Republic
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SYSNO ASEP 0338926 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The involvement of F CO2, and As in the alteration of Zr-Th-REE-bearing accessory minerals in a the Hora Svaté Kateřiny A-type granite, Czech Republic Author(s) Breiter, Karel (GLU-S) RID, SAI, ORCID
Čopkajová, R. (CZ)
Škoda, R. (CZ)Source Title Canadian Mineralogist. - : Mineralogical Association of Canada - ISSN 0008-4476
Roč. 47, č. 6 (2009), s. 1375-1398Number of pages 24 s. Publication form WWW - WWW Language eng - English Country CA - Canada Keywords zircon ; thorite ; monazite ; xenotime ; håleniusite ; granite ; solid solution ; Erzgebirge ( Czech Republic) Subject RIV DB - Geology ; Mineralogy R&D Projects IAA300130801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000274017700005 EID SCOPUS 77249098367 DOI 10.3749/canmin.47.6.1375 Annotation The assemblage of Zr(Hf)-Th(U)-REE minerals from an A-type granite from Hora Svaté Kateřiny were studied to distinguish magmatic and hydrothermal processes affected the rock. The primary accessory phases included fluorite, magnetite, zircon, xenotime, monazite, and thorite. Solid solutions of (Th+U)-, (Zr+Hf)- and REE-components formed domains within zircon and thorite crystals and are supposed to by primary. Pyrite and arsenopyrite crystallised from the first portion of hydrothermal fluid with low oxygen fugacity. Later, fluid with higher oxygen fugacity altered magnetite, sulphides, and dissolved xenotime. During this time, Th and U-bearing zircon and thorite were partially metamictised. Arsenic was oxidised to As5+ and intensively metasomatised xenotime, Y-rich zircon and thorite forming chernovite. Even later, fluid rich in CO2 dissolved metamictised thorite and partially dissolved monazite after only short transport at the contact with fluorite crystallised Th-rich bastnäsite. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2010
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