| 吐哈盆地西南部铀矿化特征与成矿潜力评价 |
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| 引用本文： | 权志高,张甲民,孙延怀,张发,姬海军.吐哈盆地西南部铀矿化特征与成矿潜力评价[J].中国地质,2011,38(6):1568-1575. |
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| 作者姓名： | 权志高 张甲民 孙延怀 张发 姬海军 |
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| 作者单位： | 核工业203研究所 |
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| 基金项目： | 中国地质调查局地质大调查项目(200010100001)资助 |
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| 摘 要： | 吐哈盆地西南部艾丁湖斜坡带为一相对稳定的地质构造单元,其上在温湿气候条件下超覆沉积了下侏罗统八道湾组、三工河组和中侏罗统西山窑组。中侏罗统西山窑组主体为一套河流相-河流三角洲相的含煤碎屑岩系;地层泥-砂-泥结构发育良好,砂体岩性主要为成分成熟度和结构成熟度均较低的长石质砂(砾)岩、岩屑砂(砾)岩;岩石为黑色和灰色原生地球化学,具有较强的还原能力。组内层间氧化带广泛发育,总体可划分为完全氧化亚带、其不完全氧化亚带、氧化还原过渡带和原生岩石带,砂岩型铀矿化完全受层间氧化带控制,位于氧化还原过渡带内。目前已在区内找到了十红滩大型层间氧化带砂岩型铀矿床。通过对吐哈盆地西南部构造地质背景、找矿目的层、层间氧化带、水文地质条件、岩石原生地球化学类型及区内已发现铀矿床基本特征的综合分析,指出区内未来仍具有广阔的层间氧化带型铀矿找矿前景。认为十红滩地区作为下一步铀矿勘探基地,主攻层位为中侏罗统西山窑组第一、三岩性段;迪坎儿地段为下一步普查远景区,主攻层位为西山窑组第三岩性段;白咀山、八仙口地段为下一步预查远景区,主攻层位为西山窑组第二、三岩性段。
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| 关 键 词： | 吐哈盆地西南部 找矿目的层 层间氧化带 成矿潜力 远景区 |
Uranium mineralization characteristics of southwest Turpan-Hami basin and evaluation of metallogenic potential |
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| QUAN Zhi-gao,ZHANG Jia-min,SUN Yan-huai,ZHANG F,JI Hai-jun.Uranium mineralization characteristics of southwest Turpan-Hami basin and evaluation of metallogenic potential[J].Chinese Geology,2011,38(6):1568-1575. |
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| Authors: | QUAN Zhi-gao ZHANG Jia-min SUN Yan-huai ZHANG F JI Hai-jun |
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| Institution: | (No.203 Institute of Uranium Deposit,Nuclear Industry Company,Xianyang 712000,Shaanxi,China) |
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| Abstract: | The Aiding slope zone in southwest Turpan-Hami basin is a relatively stable tectonic unit,overlain by lower Jurassic Badaowan Formation,Sangonghe Formation and middle Jurassic Xishanyao Formation under warm and moist climate conditions.Middle Jurassic Xishanyao Formation is mainly a suite of coal-bearing fragment rock series of stream-stream delta facies.The mudstone-sandstone-mudstone texture of strata is well developed,and the sandstone body is mainly composed of feldspathic sandstone(conglomerate) and lithoclast sandstone(conglomerate) characterized by relatively low compositional maturity and texture maturity.Primary geochemical types of the rock are black and grey,with relatively strong reduction capability.The interlayer oxidation zone is widely developed in the formation and can be divided into 4 sub-zones,i.e.,whole oxidation sub-zone,imperfect oxidation sub-zone,reduction-oxidation intermediate sub-zone and primary rock sub-zone.Sandstone type uranium mineralization is controlled fully by the interlayer oxidation zone and grows within the reduction-oxidation transitional zone.The Shiihongtan large-size interlayer oxidation zone type uranium deposit was recently found in the area.An integrated analysis of structural geological setting,target stratum for prospecting,interlayer oxidized zone,hydrogeological features,primary geochemical type of rocks and basic features of uranium ore in southwest Turpan-Hami basin indicates that prospecting vista of the interlayer oxidized zone uranium ore deposits is vast in the study area.The authors hold that Shiihongtan area should be regarded as the base area for further uranium exploration,and the main promising horizons are 1st and 3rd lithologic members of Middle Jurassic Xishanyao Formation,that Dican’er segment can serve as the prospective area for next reconnaissance survey,with the main promising horizon being 3rd lithologic member of Xishanyao Formation,and Baizuishan and Baxiankou segments can serve as the further pre-survey prospective areas,with the promising horizons being 2nd and 3rd lithologic members of Xishanyao Formation. |
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| Keywords: | southwest Turpan-Hami basin target stratum for prospecting interlayer oxidized zone metallogenic potential prospective area |
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