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An analysis of the prospect in the search for uranium deposits in the aerial radioactive anomaly area of Chengyang-Wugou region on the southern margin of Ordos basin |
Jiang-Yuan CHEN1,2 |
1. Aribore Survey and Remote Sensing Center of Nuclear Industry, Shijiazhuang 050002 China 2. CNNC Key Laboratory for Geophysical Exploration Technology Center of Urannium Resource, Shijiazhuang 050002 China |
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Abstract The study area is located in the west of the southern margin of Ordos basin, on the western wing of Tianhuan depression, where Ⅰ-160 sandstone-type uranium ore spot exists. Based on the collection and collation of previous data and combined with the investigation results of airborne radioactive anomalies distributed in the study area, the author analyzed uranium mineralization conditions in this region and discussed the prospect of uranium exploration. It is concluded that there are favorable ore-hunting zones in the Chengyang-Wugou area, which has better conditions of sandstone-type uranium mineralization, with the aviation radioactive anomaly being the key prospecting area. The author delineated a favorable area for uranium prospecting. The results obtained by the author seem to have directive significance in the acceleration of the exploration of uranium and mineral resources in this region.
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Received: 28 June 2018
Published: 31 May 2019
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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
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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
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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
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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
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Total ground gamma measurement contour plan of the HFU-50 and 51 anomaly area
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The ground gamma spectrometry U Content contour map (a) and content section plan (b) in the HFU-50 and 51 anomalies area
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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
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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
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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
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Stratigraphic lithologic correlation histogram in the HFU-50 and 51 anomaly area peripheral areas
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Cross bedding characteristic in the anomaly area a—jinchuan Formation Yellow fine sandstone interleaving stratification; b—luohandong group brown-red fine sandstone interleaving stratification
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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
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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
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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
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条件 | 矿区概况 | 条件 | 矿区概况 | 构造背景 | 天环坳陷西翼,向东倾斜的构造斜坡带 | 矿化蚀变 | 含1个铀矿点,HFU-50岩石铀含量高达万分之六 | 赋铀地层 | 下白垩统泾川组、罗汉洞组 | 航测铀预测区 | 郭塬—武沟砂岩型铀矿预测区 | 岩性—岩相 | 泥—砂—泥互层,河流—三角洲相 | 航放异常 | 分布4个航放异常 | 层间氧化带前锋线 | 分布泾川组及罗汉洞组层间氧化带前锋线 | 活性铀富集 | 多片活性铀富集带,总体以迁入为主 | 水文地质 | 具备完整的补—径—排水动力体系 | 油气 | 该区西北角有油气分布 | 古气候环境 | 半干旱—湿热 | | |
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List of the basis for delineation of favorable uranium prospecting areas in Chengyang-wugou
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送样号 | 样品 | 岩性 | w(U)/ | w(Ra)/ | w(Fe2O3)/ | w(FeO)/ | w(Fe2O3)/ | 有机碳/ | 编号 | (10-6 g·g-1) | (10-12 g·g-1) | (10-2 g·g-1) | (10-2 g·g-1) | /w(FeO) | (10-2 g·g-1) | YSHFU-50-1 | 3245 | 灰白色粉—细砂岩, | 634.5 | — | 0.81 | 0.44 | 1.86 | 0.046 | YSHFU-50-2 | 3246 | 灰白、浅黄色粉砂岩 | 498.1 | — | 0.95 | 0.47 | 2.02 | 0.07 | YSHFU-50-6 | 3250 | 灰白色钙质粉砂岩 | 261.5 | — | 0.92 | 0.71 | 1.29 | 0.095 | YSHFU-50-11 | 3255 | 浅黄色粉—细砂岩 | 392 | — | 0.91 | 0.49 | 1.86 | 0.062 | YSHFU-51-3 | 3259 | 灰白色泥质粉砂岩 | 203.8 | — | 0.87 | 0.8 | 1.09 | 0.103 | YSHFU-51-4 | 3260 | 灰白色粉砂岩 | 414.1 | 138.7 | 1.26 | 0.65 | 1.93 | 0.095 | YSHFU-51-5 | 3261 | 灰白色泥岩 | 249.4 | 83.6 | 1.29 | 0.8 | 1.61 | 0.079 | YSHFU-51-13 | 3269 | 红褐色长石石英砂岩 | 10.5 | — | 1.17 | 0.88 | 1.33 | 0.062 | YSHFU-51-14 | 3270 | 黄色砂岩(氧化) | 9.9 | — | 1.02 | 0.39 | 2.62 | 0.087 | YSHFU-51-16 | 3272 | 灰白、浅黄色粉砂岩 | 55.4 | 18.6 | 1.28 | 0.75 | 1.7 | 0.095 |
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Geochemical characteristics of different lithology in the anomaly area
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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
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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
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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
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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
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Geological profile of exploration line 5 in Zhenyuan
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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
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