FIG. 8. Concordia plot of SHRIMP data from zircons from the host metavolcanic rocks of the Igarapé Bahia Fe oxide Cu-Au-(U-REE) deposit. The weighted mean 207Pb/206Pb age from the concordant analyses (shown as unshaded) is 2748 ± 34 Ma (MSWD = 2.7). Samples UWA-B18C and UWA-B18D.