戈壁区效率可调动态地气法探测隐伏砂岩铀矿的试验及效果

doi:10.11720/wtyht.2025.1236

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Abstract

Experiments on prospecting for concealed sandstone-type uranium deposits using the dynamic geogas method were conducted in a gobi desert region by deploying a survey line in each known sandstone-type uranium deposit and uranium ore occurrence. The results indicate that the dynamic geogas sampling technology with adjustable efficiency detected geogas anomaly zones above all known concealed sandstone-type uranium deposits. These zones were characterized by multiple adjacent anomaly peaks composed primarily of uranium (U) and multiple associated (paragenetic) elements, with widths approaching those of the surface projections in a range from the ore bodies with a burial depth of approximately 50 m to the boundaries of the ore bodies' overturning ends. Therefore, the geogas anomaly zones and their widths serve as important ore-prospecting indicators for concealed sandstone-type uranium deposits. The relationships of captured geogas anomalies with factors such as the depths and grades of ore bodies in the experimental area confirm that the dynamic geogas method with adjustable efficiency can detect concealed sandstone-type uranium deposits at depths exceeding 756.4 m. The relationships also reveal that the amplitude of U geogas anomalies increases with the ore body grade and that the spacing between geogas detection points on the profile for sandstone-type uranium deposits should not exceed 50 m. The experiment corroborates that the geogas method is feasible and effective in detecting concealed sandstone-type uranium deposits in a gobi desert region.

Key words： experiment on prospecting for concealed sandstone-type uranium deposits using the geogas method dynamic geogas technology with adjustable efficiency ore-prospecting indicator for geogas

Received: 23 May 2024 Published: 22 July 2025

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	Guo-An LIU
	Si-Chun ZHOU
	Xiao-Hui LIU
	Sheng-Fu LI
	Ming-Zheng ZHANG
	Ming-Kuan QIN
	Qiang XU
	Guang-Xi WANG
	Bo HU

Cite this article:

Guo-An LIU,Si-Chun ZHOU,Xiao-Hui LIU, et al. Experiments and effects on prospecting for concealed sandstone-type uranium deposits in a gobi desert region using the dynamic geogas method with adjustable efficiency[J]. Geophysical and Geochemical Exploration, 2025, 49(3): 538-547.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2025.1236 OR https://www.wutanyuhuatan.com/EN/Y2025/V49/I3/538

Location (a) and geological characteristics (b) of the study area
1—Quaternary; 2—Anju'an Group; 3—Kiziloyi Group; 4—Bashibulake Group; 5—Ulagan Group; 6—Karatal Group; 7—Zimugen Group; 8—Altash Group; 9—Yingjisha Group; 10—the fifth lithological segment of the Kizilsu Group; 11—the fourth lithological segment of the Kizilsu Group; 12—the third lithological segment of the Kizilsu Group; 13—the second lithological segment of the Kizilsu Group; 14—the first lithological segment of the Kizilsu Group; 15—Aksu Group of the Great Wall System; 16—oxidation zone Ⅰ; 17—oxidation zone Ⅱ; 18—oxidation zone Ⅲ; 19—stratum boundary; 20—industrial ore holes, mineralized holes, and non mineralized holes; 21—uranium deposits/points; 22—geogas test line

Structural diagram of double trap series dynamic geogas sampling device with adjustable efficiency

Comparison table between the basic measurement and the inspection measurement of U in the feasibility test

Statistics of U element parameters in geogas test of sections A and B μg·L^-1

Statistics of the lower limit of anomalies for the elements used to compile the results of the geogas survey

Profile map of U, Th, K, Zn, Pb, Cu, Mo and Mn elements of geogas test on the A survey line
1—Quaternary; 2—the fifth lithological segment of the Lower Cretaceous Kizilsu Group; 3—the fourth lithological segment of the Lower Cretaceous Kizilsu Group; 4—the third lithological segment of the Lower Cretaceous Kizilsu Group; 5—the second lithological segment of the Lower Cretaceous Kizilsu Group; 6—the first lithological segment of the Lower Cretaceous Kizilsu Group; 7—middle Proterozoic Aksu Group; 8—the integrate boundaries, angular uncon-formity bounidaries; 9—oxidation zone; 10—industrial ore bodies, mineralized bodies, abnormal bodies; 11—borehole number,depth; 12—geogas survey profile

Profile map of U, Th, K, Zn, Pb, Cu, Mo and Mn elements of geogas test on the B survey line
1—Quaternary; 2—the fifth lithological segment of the Lower Cretaceous Kizilsu Group; 3—the fourth lithological segment of the Lower Cretaceous Kizilsu Group; 4—the third lithological segment of the Lower Cretaceous Kizilsu Group; 5—the second lithological segment of the Lower Cretaceous Kizilsu Group; 6—the first lithological segment of the Lower Cretaceous Kizilsu Group; 7—middle Proterozoic Aksu Group; 8—the integrate boundaries, angular uncon-formity bounidaries; 9—oxidation zone; 10—industrial ore bodies, mineralized bodies, abnormal bodies; 11—borehole number, depth; 12—lower limit of U anomaly for geogas survey; 13—U anomaly number for geogas survey; 14—geogas survey profile

Profile map of Ti, Cr, Co, Nb, Li, Rb, La and Sc elements of geogas test on the A survey line
1—Quaternary; 2—the fifth lithological segment of the Lower Cretaceous Kizilsu Group; 3—the fourth lithological segment of the Lower Cretaceous Kizilsu Group; 4—the third lithological segment of the Lower Cretaceous Kizilsu Group; 5—the second lithological segment of the Lower Cretaceous Kizilsu Group; 6—the first lithological segment of the Lower Cretaceous Kizilsu Group; 7—middle Proterozoic Aksu Group; 8—the integrate boundaries,angular unconformity boundaries; 9—oxidation zone; 10—industrial ore bodies, mineralized bodies, abnormal bodies; 11—borehole number,depth; 12—geogas survey profile

Profile map of Sb, W, V, Y, Zr, Nd, Sr and Fe elements of geogas test on the A survey line
1—Quaternary; 2—the fifth lithological segment of the Lower Cretaceous Kizilsu Group; 3—the fourth lithological segment of the Lower Cretaceous Kizilsu Group; 4—the third lithological segment of the Lower Cretaceous Kizilsu Group; 5—the second lithological segment of the Lower Cretaceous Kizilsu Group; 6—the first lithological segment of the Lower Cretaceous Kizilsu Group; 7—middle Proterozoic Aksu Group; 8—the integrate boundaries,angular unconformity boundaries; 9—oxidation zone; 10—industrial ore bodies, mineralized bodies, abnormal bodies; 11—borehole number,depth; 12—geogas survey profile

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