Počet záznamů: 1
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
- 1.
SYSNO ASEP 0338926 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název 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 Tvůrce(i) Breiter, Karel (GLU-S) RID, SAI, ORCID
Čopkajová, R. (CZ)
Škoda, R. (CZ)Zdroj.dok. Canadian Mineralogist. - : Mineralogical Association of Canada - ISSN 0008-4476
Roč. 47, č. 6 (2009), s. 1375-1398Poč.str. 24 s. Forma vydání WWW - WWW Jazyk dok. eng - angličtina Země vyd. CA - Kanada Klíč. slova zircon ; thorite ; monazite ; xenotime ; håleniusite ; granite ; solid solution ; Erzgebirge ( Czech Republic) Vědní obor RIV DB - Geologie a mineralogie CEP IAA300130801 GA AV ČR - Akademie věd CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000274017700005 EID SCOPUS 77249098367 DOI 10.3749/canmin.47.6.1375 Anotace 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. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2010
Počet záznamů: 1