论文部分内容阅读
一、地质概况 2780砂岩型铀矿床,位于南天山地槽褶皱带内的山间断陷中。断陷两侧为高角度逆冲断裂,形成地堑式构造,它是以石炭—二叠系为基底发育起来的中、新生代沉积盆地。盆地近东西向展布,其形态受盆缘断裂控制,基底呈向南倾斜的不对称坳陷。盖层沉积在盆地北翼表现为T—J—K—R由北而南平行叠置;南翼地层则发育不全,并深埋于南缘断裂之下。
First, the geological overview 2780 sandstone-type uranium deposits, located in the South Tianshan Trough fold belt within the mountain fault. On both sides of the fault depression are high-angle thrust faults, forming a graben-type structure. It is a Mesozoic-Cenozoic sedimentary basin developed from the Permo-Carboniferous basis. Basins are distributed in the east-west direction and their morphology is controlled by basin-edge faults. The basement presents an asymmetric depression with a southward slope. The caprock is deposited in the northern wing of the basin as T-J-K-R stacked in parallel from north to south; the southern wing is underdeveloped and buried beneath the southern margin.