图1   研究区盖层构造分区示意

1—构造单元分界线;2—鄂尔多斯盆地边界;3—居民点;4—水系;5—航空物探测区;6—研究区

Fig.1   Schematic diagram of caprock zonation in the research area

1—tectonic unit boundrry; 2—ordos basin boundrry; 3—housing estate; 4—water system; 5—airborne geophysical survey area; 6—research area

图2   城阳—武沟地区区域地质简图

1~3—第四系;4—新近系;5—泾川组;6—罗汉洞组;7—地质界线;8—角度不整合界线;9—推测泾川组层间氧化带前锋线;10—推测罗汉洞组层间氧化带前锋线;11—航放异常位置及编号;12—磕头机位置;13—铀异常孔及编号;14—铀矿化孔及编号;15—铀矿点;16—居民点;17—实测产状;18—研究区

Fig.2   Regional generalized geological map of Chengyang-Wugou area

1~3—quaternary system; 4—paleogene system; 5—jingchuan formation; 6—luohandong formation; 7—geological boundary; 8—angle not integrated boundary; 9—presumably the front line of the interlayer oxidation zone in the jingchuan Formation; 10—presumably the front line of the interlayer oxidation zone in the luohandong Formation; 11—postion and number of abnormal aerial radioactivity; 12—oil drilling location; 13—uranium abnormal holes and numbers; 14—uranium mineralization hole and number; 15—uranium ore occurrence; 16—housing estate; 17—measured production; 18—research area

图3   HFU-50及51异常区岩石野外观察特征

a—泥—砂—泥互层;b—斜层理;c—后生氧化砂岩;d—赋铀岩性粉砂岩

Fig.3   The characteristics of rock through field observation in the anomaly areain the HFU-50 and 51 anomaly area

a—mud-Sand-Mud Interlayer; b—oblique; c—post-oxidation sandstone; d—uranium lithologic siltstone

图4   HFU-50及51异常区航放铀剖面及等值线平面

a—航放铀剖面平面图;b—航放铀等值线平面图

Fig.4   The airborne radiocactive U content profile and U content section plan of the HFU-50 and 51 anomaly area

a—airborne radiocactive U content profile map; b—airborne radiocactive U content section plan

图5   HFU-50及51异常区地面伽马总量测量等值线平面

Fig.5   Total ground gamma measurement contour plan of the HFU-50 and 51 anomaly area

图6   HFU-50及51异常区地面伽马能谱铀含量等值线(a)及剖面平面(b)

Fig.6   The ground gamma spectrometry U Content contour map (a) and content section plan (b) in the HFU-50 and 51 anomalies area

图7   HFU-50及51异常区氡浓度异常点带分布

1—偏高晕;2—高晕;3—异常晕;4—异常点下限晕圈;5—异常点及编号;6—异常带及编号

Fig.7   Distribution map of radon concentration anomaly zone in the HFU-50 and 51 anomalies area

1—high halo; 2—high dizzy; 3—abnormal halo; 4—lower limit halo of abnormal points; 5—abnormal points and numbers; 6—abnormal band and number

图8   HFU-50及51异常区地面物化探测量综合成果

1—第四系;2—泾川组;3—产状;4—河流;5—水流方向;6—异常点位置及编号;7—U异常范围;8—氡异常分布范围;9—氡异常点位置及编号;10—氡异常带位置及编号;11—岩石样点位及编号;12—土壤样点位及编号;13—薄片样点位及编号;14—地质、物化探综合测量范围

Fig.8   Comprehensive result of geophysical and geochemical detection quantity in the HFU-50 and 51 anomalies area

1—quaternary; 2—jingchuan formation; 3—measured production; 4—river; 5—flow direction; 6—location and number of abnormal points of the navigation; 7—u anomaly distribution; 8—Rn abnormal distribution range; 9—location and number of radon anomaly point; 10—radon heterogeneity; 11—rock sample location and serial number; 12—soil sample location and serial number; 13—sheet sample location and serial number; 14—geological and geophysical survey range

图9   盆地西南部构造单元划分

1—印支期断裂;2—燕山期断裂;3—喜山期断裂;4—一级构造单元界线;5—二级构造单元界线;6—三级构造单元界线;7—盆地边界线;8—砂岩型铀矿床、矿点、矿化点、砂岩型铀异常;9—航放异常点位置及编号;10—研究区;11—居民点

Fig.9   Division map of tectonic units in southwestern basin

1—indosinian period fracture; 2—yanshan period fracture; 3—xishan period fracture; 4—first class structural unit boundary; 5—class ii construction unit boundary; 6—tertiary structural unit boundary; 7—basin boundary line; 8—sandstone type uranium deposit、ore spot、mineralization point; 9—position and number of abnormal points of the aircraft; 10—research area; 11—housing estate

图10   HFU-50及51异常区地层岩性对比柱状图

Fig.10   Stratigraphic lithologic correlation histogram in the HFU-50 and 51 anomaly area peripheral areas

图11   异常区交错层理特征

a—泾川组黄色细砂岩交错层理;b—罗汉洞组棕红色细砂岩交错层理

Fig.11   Cross bedding characteristic in the anomaly area

a—jinchuan Formation Yellow fine sandstone interleaving stratification; b—luohandong group brown-red fine sandstone interleaving stratification

图12   泾川组沉积相

1—沉积剥蚀边界;2—冲积扇相;3—辫状河相;4—滨浅湖亚相;5—水流方向;6—河流;7—查证航放异常位置及编号;8—居民点;9—铀找矿有利区

Fig.12   Sedimentary facies map of Jingchuan formation

1—depositional denudation boundary; 2—alluvial fan facies; 3—braided river facies; 4—shore shallow Lake subfacies; 5—flow direction; 6—rivers; 7—position and number of abnormal points of the aircraft; 8—housing estate; 9—uranium ore prospecting area

图13   罗汉洞组沉积相

1—蚀源区;2—河流—三角洲相;3—滨浅湖相;4—石油钻孔;5—核地质钻孔;6—查证航放异常位置及编号;7—居民点;8—铀找矿有利区

Fig.13   Sedimentary facies map of Luohandong formation

1—etching source area; 2—river-Delta Phase; 3—shallow Lake Phase; 4—oil drilling; 5—nuclear Geological boreholes; 6—position and number of abnormal points of the aircraft; 7—housing estate; 8—uranium ore prospecting area

图14   六盘山地区地下水补给白垩系自流水盆地示意^[7]

1—砂岩;2—砂砾岩;3—砾岩;4—砂质泥岩和煤层;5—硅质灰岩;6—泥页岩;7—断裂及隐伏断裂;8—不整合接触界线;9—水位线;10—钻孔编号;11—记录点

Fig.14   Schematic diagram of cretaceous self-flowing water basin for groundwater recharge in Liupanshui area

1—sandstone; 2—sand conglomerate; 3—conglomerate; 4—sandy mudstone and coal seam; 5—siliceous limestone; 6—mud shale; 7—faults and concealed faults; 8—unconformity contact line; 9—water line;10—drill hole number;11—recording point

图15   城阳—武沟铀找矿有利区地质简图

1~3第四系;4—新近系;5—泾川组;6—罗汉洞组;7—地质界线;8—角度不整合界线;9—泾川组层间氧化带;10—罗汉洞组层间氧化带;11—未查证异常及编号;12—2016年度三级查证异常及编号;13—2017年度三级查证异常及编号;14—磕头机位置;15—铀异常孔及编号;16—铀矿化孔及编号;17—铀矿点;18—居民点;19—产状;20—航空物探圈定铀预测区;21—铀找矿有利区

Fig.15   Generalized geological map of Chengyang-wugou favorable uranium prospecting areas

1~3—quaternary system; 4—paleogene system; 5—jingchuan formation; 6—luohandong formation; 7—geological boundary; 8—angle not integrated boundary; 9—jingchuan Interlayer Oxidation Belt; 10—luogandong Interlayer Oxidation Belt; 11—unverified exceptions and numbers; 12—level 3 Verification of Abnormalities and Numbers in 2016; 13—level 3 Verification of Abnormalities and Numbers in 2017; 14—oil drilling; 15—uranium abnormal holes and numbers; 16—uranium mineralization hole and number; 17—uranium ore occurrence; 18—estate; 19—production; 20—aviation Projection Zone; 21—uranium ore prospecting area

图16   城阳—武沟铀找矿有利区沉积相分布特征

1—河流相;2—三角洲相;3—岩相界线;4—罗汉洞组底板等深线;5—泾川组层间氧化带;6—罗汉洞组层间氧化带;7—未查证异常及编号;8—2016年度三级查证异常及编号;9—2017年度三级查证异常及编号;10—铀异常孔及编号;11—铀矿化孔及编号;12—居民点;13—铀找矿有利区

Fig.16   Sedimentary facies distribution characteristic map of Chengyang-wugou favorable uranium prospecting areas

1—river phase; 2—delta phase; 3—lithofacies boundary; 4—luohandong group floor contour; 5—jingchuan Interlayer Oxidation Belt; 6—luogandong Interlayer Oxidation Belt; 7—unverified exceptions and numbers; 8—level 3 Verification of Abnormalities and Numbers in 2016; 9—level 3 Verification of Abnormalities and Numbers in 2017; 10—uranium abnormal holes and numbers; 11—uranium mineralization hole and number; 12—estate; 13—uranium ore prospecting area

图17   城阳—武沟铀找矿有利区TC、K、U、Th铀含量等值线平面

a—航放总量等值线平面;b—钾含量等值线平面;c—铀含量等值线平面;d—钍含量等值线平面1—未查证异常及编号;2—2016年度三级查证异常及编号;3—2017年度三级查证异常及编号;4—铀矿点;5—居民点;6—铀找矿有利区

Fig.17   TC、K、U、Th content contour map of Chengyang-wugou favorable uranium prospecting areas

a—total air volume contour map; b—K content contour map; c—U content contour map; d—Th content contour map 1—check exceptions and Numbers; 2—2016 three-level verification anomaly and serial number; 3—2017 third-level verification anomaly and serial number; 4—uranium mines; 5—settlements; 6—uranium ore prospecting area

图18   城阳—武沟铀找矿有利区U/K、U/Th、古铀、活性铀含量等值线平面

a—铀钾比等值线平面;b—铀钍比等值线平面;c—古铀含量等值线平面;d—活性铀含量等值线平面 1—未查证异常及编号;2—2016年度三级查证异常及编号;3—2017年度三级查证异常及编号;4—铀矿点;5—居民点;6—铀找矿有利区

Fig.18   U/K、U/Th、Gui、Hui content contour map of Chengyang-wugou favorable uranium prospecting areas

a—w(U)/w(K) contour map; b—w(U)/w(Th) content contour map; c—ancient U content contour map; d—active U content contour map 1—check exceptions and Numbers; 2—2016 three-level verification anomaly and serial number; 3—2017 third-level verification anomaly and serial number; 4—uranium mines; 5—settlements; 6—uranium ore prospecting area

图19   镇原地段5号勘探线地质剖面

Fig.19   Geological profile of exploration line 5 in Zhenyuan

图20   城阳—武沟铀找矿有利区分布

1—第四系;2—新近系;3—泾川组;4—罗汉洞组;5—地质界线;6—角度不整合界线;7—泾川组层间氧化带;8—罗汉洞组层间氧化带;9—航放铀异常及高场分布范围;10—活性铀<-0.5×10^-6 (g·g^-1)分布范围;11—土壤氡异常分布范围;12—未查证异常及编号;13—2016年度三级查证异常及编号;14—2017年度三级查证异常及编号;15—磕头机位置;16—铀异常孔及编号;17—铀矿化孔及编号;18—铀矿点;19—居民点;20—产状;21—航空物探圈定铀预测区;22—铀找矿有利区

Fig.20   Distribution map of Chengyang-wugou favorable uranium prospecting areas

1—quaternary system; 2—paleogene system; 3—jingchuan formation; 4—luohandong formation; 5—geological boundary; 6—angle not integrated boundary; 7—jingchuan Interlayer Oxidation Belt; 8—luogandong Interlayer Oxidation Belt; 9—uranium anomaly and high field distribution range; 10—active uranium <-0.5×10^-6 g/g distribution range; 11—distribution of radon anomaly in soil; 12—unverified exceptions and numbers; 13—level 3 Verification of Abnormalities and Numbers in 2016; 14—level 3 Verification of Abnormalities and Numbers in 2017; 15—oil drilling; 16—uranium abnormal holes and numbers; 17—uranium mineralization hole and number; 18—uranium ore occurrence; 19—estate; 20—production; 21—aviation Projection Zone; 22—uranium ore prospecting area