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자료유형
학술저널
저자정보
Yaming Sun (College of Earth Sciences Jilin University Changchun China) Bile Li (College of Earth Sciences Jilin University Changchun China) Peng Li (Qinghai First Geological Exploration Institute Haidong China) Zhihua Li (College of Earth Sciences Jilin University Changchun China) Yufan Shi (College of Earth Sciences Jilin University Changchun China) Runtao Yu (College of Earth Sciences Jilin University Changchun China)
저널정보
한국지질과학협의회 Geosciences Journal Geosciences Journal Vol.26 No.6
발행연도
2022.12
수록면
685 - 701 (17page)
DOI
10.1007/s12303-022-0013-2

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The spatial distribution of flow units and reductant within a sandstone uranium reservoir is very beneficial for exploring the uranium mineralization mechanism; however, such studies have been almost neglected. As such, this paper aims to provide the sedimentological interpretation and heterogeneity models of the sandstone of the Middle Jurassic Zhiluo Formation at Shiwan outcrop area, in the eastern Ordos Basin. The outcrops are sandstone-dominated subaqueous distributary channel successions, in which five distinct architectural elements are identified and interpreted: channel units (CU), downstream accretion elements (DA), lateral accretion elements (LA), sandy bedforms (SB) and no-channelized fine-grained sediments (NFS). Within the sandstone succession, six flow units are present in the middle and lower parts of CU, or the lower parts of DA and SB elements, with their geometry to be controlled by the fourth- or third-order bounding surfaces. Moreover, the carbonaceous debris-rich zones (CDZ) are places with the highest abundance of reductant and preserve exclusively upon the basal erosional surfaces of CU and DA elements. Based on those results, a prediction model is established and shows that the formation of interlayer oxidation zone is strongly selective and confined within the CU and DA elements. The favorable site of uranium mineralization is preferentially distributed in the transition zone between the front of flow unit and the CDZ.

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