“…However, REE fractionations and redistributions have been reported from various bauxite deposits due to evolution of geochemical systems in various mechanisms and conditions such as mobilization of REE, supergene processes, surficial weathering, diagenetic processes, presence of REEbearing mineral phases, pH of solutions and/or depositional environment, and existence of organic and/or non-organic complexing ligands (Mondillo et al, 2011;Abedini and Calagari, 2013;Mongelli et al, 2014Mongelli et al, , 2016Mongelli et al, , 2017Liu et al, 2016;Buccione et al, 2016;Hou et al, 2017;Khosravi et al, 2017;Long et al, 2017;Radusinovic et al, 2017;Torró et al, 2017;Yuste et al, 2017;Chen et al, 2018). Generally, these Fig.…”