Study on mineralization structures of vein shape granite type uranium deposit and prospecting prognosis in Menggongjie

With the method of continental structure system, this paper investigates the mineralization structural characters of Menggongjie uranium orefield in Miaoershan deposit in northern Guangxi province. It is found that the NNW ore vein is controlled by the left-lateral shear stress derived from regional NNE stress field. The tenacity shear' zone, formed before the mineralization, is both the migration channel of the ore solution and the storring space of the orebody. The ore vein and lode caused by shearing, is in en echelon arrangement and rake on NNW. Based on the forecast on mineralized structure, the orebody should be fourable in the deep of No. 1 ore vein and blind orebody may imbed in the deeper place of No. 2-6 ore veins due to the gradually deepenning from west to east of mineralized segment of the vein. (authors)