Britolit-(Y): neskoromagmatický akcesorický minerál Y-REE z granitu A-typu v Stupnom pri Považskej Bystrici, Pieninské bradlové pásmo (severozápadné Slovensko)

Pages

224-229

Citation

ONDREJKA, Martin a UHER, Pavel. Britolit-(Y): neskoromagmatický akcesorický minerál Y-REE z granitu A-typu v Stupnom pri Považskej Bystrici, Pieninské bradlové pásmo (severozápadné Slovensko). Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze. Prague: National Museum, 2008, 16(2), 224-229. ISSN 1211-0329 (print), 1804-6495 (online). Also available from: https://www.nm.cz/en/periodicals/bmpholnrhmvp/16-2/britolit-y-neskoromagmaticky-akcesoricky-mineral-y-ree-z-granitu-a-typu-v-stupnom-pri-povazskej-bystrici-pieninske-bradlove-pasmo-severozapadne-slovensko

Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze | 2008/16/2

Britholite-(Y): a late-magmatic, Y-REE-bearing accessory mineral from A-type granite in Stupné near Považská Bystrica, Pieniny Klippen Belt, north-western Slovakia Accessory britholite-(Y), (Y,REE,Ca,Th)5(SiO4,PO4)3(F,OH,O), forms 30 μm large inclusion in quartz from Permian A-type granite pebble in Cretaceous flysch sequence of the Pieniny Klippen Belt, Western Carpathians, Slovakia. Britholite shows compositional zoning with variable REE/Ca ratio (6 to 26 mol. % of apatite end-member) and 0.40 - 0.47 apfu F. (Y,REE)SiCa-1P-1 is the main substitution mechanism in the mineral. It contains 2.6 - 4.7 wt. % ThO2 (0.07 - 0.13 apfu Th), the highest Th contents yet reported in naturally occurring britholite-(Y). Textural and compositional data indicate their origin by alteration and partial replacement or overgrowth of primary apatite in late-magmatic, fluid-rich conditions.

224_229_Uher_Briolit.pdf

224_229_abstract.pdf