The Introduction of Volcanogenic Uranium Mineralization Using Geological, Alteration, Mineralization and Geochemical Evidence at East Bam (South - East of Iran)

Abstract

The studied area is located in the central Iran micro-continent, in the southern part of Lut block, 45 kilometers east of Bam Township. The main units of the area are mostly intercalation of pyroclastic rocks and lava layers in the age of Eocane, with the general trend of southwest- northeast and include high potassium calc- alkaline magma that their formation are related to the tectonic environments of magmatic arc and subduction zone. Argillic, silica, hematite, zeolite and chlorite alteration are observed in the area in relationship with uranium mineralization. The geochemical complexes related to uranium presence were identified in the study area. They are: complexes in relation with acidic and moderate rocks, including U-W-As-Mo-S-Cu-Ag, and complexes related to the basic igneous rocks, including U-Ni-V-Ag-Co-W-Mo-Cr-Cu-S. The main observed structures and textures in this area involve stock work, vein veinlet, corrosion, radial, release and peripheral membrane. The main mineralization in the area includes uranium secondary minerals contains Boltwoodite, Phosphuranylite and carnotite, manganese oxides, iron oxides and hydroxides, a few sulfide, zeolite mineral group and other minerals groups which mostly are formed under the influence of hydrothermal and late supergene processes. Based on a comparison pattern of mineralization in the area and its adjustment with the geological, alteration and geochemical conditions in uranium deposits, the most possible choice for mineralization type in the area has been introduced as volcanogenic uranium mineralization.

Keywords

• uranium mineralization
• volcanogene
• alteration
• bam