吐哈盆地西南缘层间氧化带矿物、岩石地球化学分带及对铀矿的控制作用  

Mineral and lithogeochemical zonation of interlayer oxidation zones in the southwest Tupan-Hami basin and its control over uranium mineralization

作　　者：陈宏斌 徐高中 李卫红 贾恒 何永振 

机构地区：[1]核工业203研究所,陕西咸阳712000

出　　处：《铀矿地质》2007年第6期350-355,共6页Uranium Geology

摘　　要：吐哈盆地西南缘层间氧化带具有明显的分带性,按照矿物组合特征和地球化学特征可划分为氧化带、氧化还原过渡带和还原带,其中氧化带又可划分为完全氧化亚带和不完全氧化亚带,各带岩石中的矿物组合特点和岩石地球化学特征不同,特征元素U、Th、∑S、C有机、Se、Mo、Re、CaO、CO2含量具有明显的分布规律。铀矿体严格受氧化还原过渡带控制,主要分布在氧化还原过渡带(铀矿石带)和不完全氧化亚带中,呈不规则卷状、板状和透镜状。Interlayer oxidation zones in the southwenter Tupan-Hami basin bears very evident zonation, according to the mineral combination and geochemical character, the zones can be devided into oxidation zone, redox transition zone and deoxidation zone, and the oxidation zone can be discriminated into fullyoxidized and partly-oxidized subzones. Mineral combination and geochemical character are different in each zone and typical elements U, Th, ∑S, C有机 , Se, Mo, Re, CaO, CO2 bear obvious distribution pattern. The orebodies are controled strictly by oxidation-deoxidation area and mainly occur in the redox transition zone and partly-oxidized subzones as irregular roll, tabula and lenticula.

关 键 词：层间氧化带 分带性 矿物组合特点 地球化学特征 氧化-还原过渡带 

分 类 号：P632.2[天文地球—地质矿产勘探] P619.14[天文地球—地质学]