The occurrence of unconformity-related uranium mineralization requires the combination of three components: fluids with the right composition, geochemical traps with the right agents that produce precipitation, and structural traps with the right geometry. In the Athabasca Basin unconformity-related uranium deposits, while basinal brines are commonly accepted as the principal mineralized fluids and graphite and gases (CH₄, CO₂, and H₂S) are well known as the reductants, only few case studies describing structural traps are published. A number of recent works, including numerical modelling, have improved the understanding of the role of inherited shear zones on fluid flow and the development of uranium deposits at a micro- and regional-scale. Nevertheless, there is still a lack of knowledge about the meso- or deposit-scale structural controls that lead to the present (and potentially predictive) localization of uranium deposits along a given shear zone. The present work examines new structural data from drill holes and deals with (i) the identification of mesoscale structural traps that lead to the formation of the Athabasca unconformity-related uranium deposits hosted within the basement and (ii) with the understanding of the role and mode of reactivation of the inherited shear zones. The Sue deposits (McClean Project), the Tri-Island showing (Martin Lake Project) in the Eastern Athabasca, and the Spitfire prospect (Hook Lake Project) in the Western Athabasca have been selected for a detailed analysis of structures and related uranium mineralization. The structural analysis performed brings new insights about the mesoscale structural controls, the role the inherited ductile fabric had on the mode of brittle reactivation and to trap mineralization, and the tectonic regime to which basement-hosted uranium deposits may be associated in the Athabasca Basin.

中文翻译：

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加拿大萨斯喀彻温省阿萨巴斯卡盆地地下室铀矿化的结构控制

与不整合有关的铀矿化的发生需要三个组成部分的组合：具有正确组成的流体，具有产生沉淀的正确试剂的地球化学阱和具有适当几何形状的结构阱。在阿萨巴斯卡盆地，与不整合有关的铀矿床，而盆地盐水通常被视为主要的矿化流体以及石墨和气体（CH ₄，CO ₂和H ₂S）是众所周知的还原剂，只有很少的案例研究描述了结构陷阱。许多近期的工作，包括数值模拟，已经在微观和区域尺度上增进了对继承剪切带在流体流动中作用以及铀矿床开发的理解。然而，仍然缺乏有关中尺度或矿床规模结构控制的知识，这些结构控制导致铀矿床在给定剪切带上的当前（和潜在的预测）定位。本工作检查了来自钻孔的新结构数据，并处理（i）中尺度结构圈闭的识别，这些陷阱导致形成地下室中与阿萨巴斯卡不整合有关的铀矿床的形成，以及（ii）了解了作用和继承的剪切带的重新激活模式。选择Sue矿床（McClean项目），位于阿萨巴斯卡东部的Tri-Island（马丁湖项目）和位于阿萨巴斯卡西部的Spitfire前景（胡克湖项目）来详细分析结构和相关的铀矿化。进行的结构分析带来了有关中尺度结构控制的新见解，继承的延性织物在脆性再活化模式中的作用以及捕获矿化的作用，