砂岩型铀矿勘查多元地学信息三维地质建模技术研究

doi:10.11720/wtyht.2025.2558

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Abstract

Three-dimensional (3D) geological modeling is regarded as an effective technical method for locating deep-seated minerals. However, its application in deep metallogenic prediction of sandstone-type uranium deposits remains limited. Focusing on the Hadatu-Saihan Gaobi area in the Erlian Basin, this study developed a 3D geological model for deep metallogenic prediction by integrating geological, geophysical, and remote sensing data. Given the characteristics of multivariate geoscience information, this study proposed a layered 3D implicit modeling method. Specifically, for modeling at depths less than 1 000 m, geological and drilling data, along with ground electromagnetic survey results, were primarily used. In contrast, for modeling at depths exceeding 1 000 m, the results from 3D joint gravity and magnetic inversion were utilized. The resulting 3D geological model reveals that primary strata in the study area include the Neogene-Paleogene, Lower Cretaceous, Permian, Carboniferous, and Neoproterozoic strata, with prominent rock masses comprising granites and intermediate-basic rocks. The elevated and slightly elevated fields of aeroradiometric uranium content around the known uranium deposit are associated with the migration, deposition, and enrichment of uranium-bearing materials, as well as fault-related tectonic movements. Through three-dimensional metallogenic prediction based on metallogenic condition analysis, three metallogenic prospect areas with geological characteristics similar to the known uranium deposit were identified. This study provides a novel philosophy for the interpretation of aeroradiometric data and the exploration of deep uranium deposits in basins.

Key words： multi-source geological information 3D geological modeling Hadatu-Saihan Gaobi area Erlian basin sandstone-type uranium deposits

Received: 21 December 2023 Published: 22 July 2025

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	Articles by authors
	Dong-Hua SUN
	Wei CHEN
	Sha-Sha CHENG
	Lian-Cheng SHI
	Jun-Wei ZHANG
	Ping QI
	Yu-Qin YANG

Cite this article:

Dong-Hua SUN,Wei CHEN,Sha-Sha CHENG, et al. A 3D geological modeling technology using multivariate geoscience information for exploration of sandstone-type uranium deposits[J]. Geophysical and Geochemical Exploration, 2025, 49(3): 631-641.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2025.2558 OR https://www.wutanyuhuatan.com/EN/Y2025/V49/I3/631

Previous work locations in the study area
1—geological profile; 2—seismic profile; 3—controlled source audio-frequency magnetotelluric (CSAMT) profile; 4—borehole; 5—uranium deposit; 6—residential area

3D geological model of the study area (with z-axis-stretched 10 times, the same below)
a—preliminary 3D geological model; b—final 3D geological model

Schematic diagram of the gradual approximation process of aeromagnetic forward modeling simulation
a—measured result; b, c—intermediate forward modeling results after continuous adjustments; d—final forward modeling result

The results of 3D joint gravity and magnetic inversion
a—density; b—susceptibility

3D visualization diagram of major geological layers (bodies)

Airborne radiometric survey results and 3D geological model

3D metallogenic prediction map of the study area

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