Rare Earth Elements Enrichment in the Upper Eocene Tošići-Dujići Bauxite Deposit, Croatia, and Relation to REE Mineralogy, Parent Material and Weathering Pattern

Tošići-Dujići bauxite deposit, situated in Dalmatian inlands, Croatia, contains minor remaining reserves. The deposit lies on Lower Eocene foraminiferal limestone and is covered by Upper Promina sediments. Bauxite samples were analyzed for textural, mineralogical, geochemical features order to determine absolute REE abundances their relation mineralogy, as well devise the origin of enrichment trace weathering bauxitization paths parent material. show total up 3500 mg/kg with significant HREE some cases. All are gibbsitic hematite anatase major phases. Kaolinite occurs most samples, goethite, böhmite, nordstrandite Monazite-(Ce) xenotime-(Y) identified detrital minerals authigenic florencite-(Ce). In abundant sample, likely bound Fe- Ti-oxide phases suggested correlation analysis. Chemical proxies intensive weathering. Geochemical textural data imply that influenced (CIA 97.87–99.26) material, also possible deposition/redeposition residual material potentially derived mobilized from various sedimentary rocks area.