Petrography and Genesis of Jajarm Bauxite Deposit
Main horizon of the Jajarm bauxite deposit, which has been developed on the karst topography of the Elika formation, is composed of diaspore. This deposit indicates marine regression and domination of the equatorial continental climate in this time. The most important textures in the hard bauxite horizon are micritic, pseudo-porphyric, oolitic, pisolitic and microclastic. Major diagenetic and epigenetic processes include oolite and pisolite formation, re-silicification and deferrification. Seemingly, under warm climatic conditions, dominated in the early late Triassic time, weathering products of the early bauxite, after short-distance transportation, trapped in the karst topography on the Elika formation. Finally, bauxitization processes had completed in these karst features.