鄂尔多斯盆地特拉敖包铀矿产地钻孔岩心元素地球化学分布特征研究OA

Taking the drill core samples from the Telaaobao uranium ore field in the Ordos basin as the research object,this study analyzes the geochemical characteristics of elements,their co-occurrence patterns,and spatial distribution features within the study area.The analysis results indicate that the enrichment coefficients or variation coefficients of 24 elements such as Li,Be,La,Ce,Pr,Nd,U,Ta,etc.,are relatively high,presenting abnormal distribution characteristics.The elements mainly occurs as five characteristic combinations:the combination of LREE such as Nd,La,Pr,Gd,Tb,Ce,Th;the combination related to the formation of associated pyrite,such as Zn,In,Cd,Re,V;the combination related to the rock-forming minerals,such as Rb,Li,Cs,Be,W;the combination of redox-sensitive elements,such as Mo,U,Sb,Tl,Sr,and the combination of Pb.The spatial combination of elements is mainly caused by the distribution of trace elements induced by fluids during the mineralization process in different strata,which is manifested as the enrichment of Sc,Th,Cr,Ti,Fe and Nb in the upper strata of the ore body,the enrichment of Pb,Th,V and Zn in the strata where the ore body occurs,and the enrichment of Th and Cr in the lower strata of the ore body.