鄂尔多斯盆地北东部延安组第Ⅴ岩段层间氧化带特征及铀成矿条件分析

Characteristics of interlayer oxidation zone in the V-rock member of Yan'an Formation in northeastern Ordos basin and analysis on conditions of uranium ore-formation

鄂尔多斯盆地是华北地台西北部的一个大型坳陷盆地,其北东部中侏罗统延安组第Ⅴ岩段沉积范围广、埋深适中,且河流相砂体较发育,经钻探查证存在古层间氧化带,并含有工业铀矿化,这为盆地内探索新找矿层位提供了重要依据。

Ordos basin is a large down-warping basin in the northwest of North-China Platform.In the northeast of the basin,the V-rock member of the Yan'an Formation,Middle Jurassic is extensively distributed and is buried at moderate depth.Sand bodies of fluvial facies are well developed in the rock member,and interlayer oxidation zone with economic uranium mineralization has been detected in it by drilling.The above fact offers an important basis for the prospecting for new ore-hosting horizons.