ویژگی های کانی شناسی - ژئوشیمی و نتیجه بوکسیت بلبلوئیه کرمان

Boboluyieh bauxi te-laterite deposit of south-cast Kemlan is presented at the base of the Naiband Formation (upper Triassic) and was directly formed on a Karstic surface of dolomitic parts of the Shotori Formation. This dcposit has a reserve of 15 mill ion lonnes. Diaspore, boehmite, chlorite, hematite, goethite, kaolinite, anatase and rutile arc the major minerals in this deposit. The common texture of tbis unit is oolitic to pisolitic. The presence of some volcanic rock fragments with pi lotaxitic texture as well as bipyramid pseudol11orphic shape of olivine and clinopy roxene gra ins reveal thai the protolith of bauxites was probably a volvan;c rock of basaltic type. Geochemical studies indicate that Bolboluy ieh bauxite is composed of40.37% AI20 3, 24.64% Fe20) and 13.92% Si02• Based on the geochemical characteristics, Bolboluyieh bauxi te is formed under condition of high silica leaching and concomitant enrichment of aluminium and iron which corrcsponds with pH between 4 to 8.5 and Eh of +0.4 to + I.