Quartz-apatite-REE vein mineralization in Early Paleozoic rocks of the Gemeric Superunit, Slovakia

Vein rare earth elements (REE) mineralization occurs in Early Paleozoic roc ks of the Gemeric Superunit. Quartz-apatite veins near Cucma village contai n 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, Helcm anovce and Kociha villages. Near Kociha crandallite (?) was also found with increased contents of REE. The REE mineralization is accompanied by apatit e, 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 wei ght percent in veins near Cui ma. The other occurrences show only moderatel y increased contents of REE and Y (from 0.1 to 0.8 weight percent). Phospha tes associated with metamorphosed black sediments are considered to be a so urce of the REE mineralization.