Abstract:Electron probe microanalyses (EPMA) of rare earth elements (REE) in xenotime, monazite, zircon, thorite and uraninite from different facies of pegmatitic granites supposed to be parental to complex rare element (REL) pegmatites of the Borborema Province (BPP) in Northeastern Brazil indicated monazite and xenotime as most common heavy accessory phases with significant enrichment in these elements. Averages of Nd and Eu in monazite are respectively 13.06 and 0.54 wt. % oxide and mean contents of Dy, Yb, Gd, and … Show more
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