“…Oxide-Apatite (Dupuis and Beaudoin, 2011), VMS deposits (Singoyi et al, 2006;Makvandi et al, 2016), carbonatite in Phalaborwa (Milani et al, 2016), as well as porphyry Cu-Mo, skarn, Ag-Pb-Zn veins, and BIF (Dupuis and Beaudoin, 2011;Nadoll, 2011;Nadoll et al, 2014). Recently, magnetite and hematite compositions have been used to identify the involvement of metamorphic and hydrothermal fluids in the genesis of high-grade iron orebodies hosted by BIF in the Quadrilátero Ferrífero, Brazil (Cabral and Rosière, 2013;Hensler et al, 2015), and the Koolyanobbing and Marda greenstone belts, Western Australia (Angerer et al, 2012;Angerer et al, 2013). Divalent cations such as Mg, Ni, Mn, Co, and Zn may substitute for Fe 2+ sites in magnetite; trivalent cations such as Al, Cr, V, Mn, and Ga replace Fe 3+ sites in magnetite or hematite (Lindsley,1λ76;Wechsler et al,1λ84), whereas cations with higher valencies (e.g.…”