适合于沙漠覆盖区隐伏砂岩铀矿勘查的地气探测技术研究

doi:10.11720/wtyht.2025.1237

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Abstract

This study developed a geogas prospecting technology suitable for concealed sandstone-type uranium deposits in desert areas. This prospecting technology consisted primarily of three parts: A geogas information collection device and sampling method tailored to desert, a method for geogas information preprocessing using the detector and material composition tests, and a method for data processing and anomaly inference and interpretation. This technology was developed based on the mechanisms behind geogas material migration and utilized a desert-specific, dust pollution-resistant geogas material sampling device equipped with a detector made of low-background polyurethane foam. Through cumulative sampling for around 45 d, this technology can effectively capture the content of U, rare earths, and associated (paragenetic) elements in concealed sandstone-type uranium deposits within desert-covered exploration areas and delineate deep uranium enrichment zones, thus achieving the goal of ore prospecting. The world's first geogas exploration section for sandstone-type uranium deposits in a desert area has been completed in an exploration area in Xinjiang, demonstrating the effectiveness of the geogas prospecting technology developed in this study.

Key words： desert area specialized geogas sampling device geogas prospecting indicator concealed sandstone-type uranium deposits

Received: 23 May 2024 Published: 22 July 2025

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	Articles by authors
	Si-Chun ZHOU
	Xiao-Hui LIU
	Ming-Kuan QIN
	Guo-An LIU
	Qiang GUO
	Qiang XU
	Bo HU
	Guang-Xi WANG

Cite this article:

Si-Chun ZHOU,Xiao-Hui LIU,Ming-Kuan QIN, et al. A geogas prospecting technology suitable for the exploration of concealed sandstone-type uranium deposits in desert areas[J]. Geophysical and Geochemical Exploration, 2025, 49(3): 529-537.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2025.1237 OR https://www.wutanyuhuatan.com/EN/Y2025/V49/I3/529

Structure of a special geogas sampling device for desert

Schematic diagram of the effect of geogas sampling device

Idealized geogas prospecting sign of the hidden tabular ore body

The comprehensive profile of the main indicator elements on the A survey line in a sandstone uranium mining area in the northern margin of the Tarim Basin
1—Quatemay; 2—the fifth lithologic member of the Lower Cretaceous Kyzylsu Group; 3—the fourth lithologic member of the Lower Cretaceous Kizilsu Group; 4—the third lithological member of the Lower Cretaceous Kyzylsu Group; 5—the second lithologic member of the Lower Cretaceous Kyzylsu Group; 6—the first lithologic member of the Lower Cretaceous Kyzylsu Group; 7—Mesoproterozoic Aksu Group; 8—the integrate boundaries, angular unconformity boundaries; 9—oxide bands; 10—industrial ore bodies; 11—U background value+2×standard deviation (0.084 μg/L); 12—U background value+1×standard deviation (0.067 μg/L); 13—U background value (0.05 μg/L); 14—elemental curve of geogas measurement

Geological and geogas engineering deployment map of a uranium mine exploration area in Tarim
1—the wind-blown sand of Quaternary; 2—fracture location and number; 3—survey line location and number; 4—drill hole location and number; 5—easy roads

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

异常区位置	测区U背景值( $X -$ )	标准差(σ)	高值下限( $X -$ +2σ)	异常下限( $X -$ +3σ)	异常区U均值	异常峰U均值
GB线3500~4200 m	0.043	0.017	0.077	0.094	0.088	0.129
SA线2800~5000 m	0.055	0.025	0.105	0.130	0.082	0.137
塔里木盆地北缘某铀矿	0.050	0.017	0.084	0.101	0.080	0.168

Statistics of U element content parameters in unknown geogas anomalies and known mineral-induced anomalies in the exploration area

Comprehensive profile of the main indicator elements on SA survey line by geogas measurement
1—sewage treatment tank; 2—Quaternary aeolian sand; 3—fracture and numbering; 4—drill hole location and number;5—elemental curve of geogas measurement; 6—U content high value peaks and numbers; 7—U content anomaly peaks and numbers

Comprehensive profile of the main indicator elements on GB survey line by geogas measurement
1—Quaternary aeolian sand; 2—elemental curve of geogas measurement; 3—U content anomaly peaks and numbers

Plane profile of U in the survey area by geogas measurement
1—Quaternary aeolian sand; 2—fracture and numbering; 3—survey line location and number; 4—drill hole location and number; 5—location and numbers of anomaly peaks; 6—curve of geogas measurement

Fig.9)
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Interpretation of geogas inference in the survey area
1—U anomalous peak location and number; 2—U prospecting sign area(the other legends have the same meaning as Fig.9)

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