Pages: 215 - 227
Abstract: Vein rare earth elements (REE) mineralization occurs in Early Paleozoic Rocks of the Gemeric Superunit. Quartz-apatite veins near Cucma village contain a significant concentration of xenotime-(Y) accompanied by monazite-(Ce), allanite-(Ce), goyazite, and plumbogummite. Less significant accumulation of disseminated xenotime and its veinlets is also known near Betliar, Helcmanovce and Kociha villages. Near Kociha crandallite (?) was also found with increased contents of REE. The REE mineralization is accompanied by apatite, uraninite, brannerite, autunite, torbernite, quartz, pyrite, turmaline, rutile, titanite, marcasite and goethite. The content of REE and Y reaches up to several tenths of one weight percent and rarely even more than 1 weight percent in veins near Cucma. The other occurrences show only moderately increased contents of REE and Y (from 0.1 to 0.8 weight percent). Phosphates associated with metamorphosed black sediments are considered to be a source of the REE mineralization.
Keywords: Gemeric superunit, distribution of REE in minerals and rocks, REE minerals, veinsDownload PDF document Show Text Version