Recent significant discoveries of uranium mineralization in the southwestern Athabasca basin, northern Saskatchewan, Canada, have been associated with a series of geophysical conductors along a NE- to SW-trending structural zone, termed the Patterson Lake corridor. The Arrow deposit (indicated mineral resource: 256.6 Mlb U₃O₈; grade 4.03% U₃O₈) is along this trend, hosted exclusively in basement orthogneisses of the Taltson domain, and is the largest undeveloped uranium deposit in the basin. This study is the first detailed analysis of a deposit along this corridor and examines the relationships between the ductile framework and brittle reactivation of structures, mineral paragenesis, and uranium mineralization. Paragenetic information from hundreds of drill core samples and thin sections was integrated with structural analysis utilizing over 18,000 measurements of various structural features. The structural system at Arrow is interpreted as a partitioned, strike-slip–dominated, brittle-ductile fault system of complex Riedel-style geometry. The system developed along subvertical, NE- to SW-trending dextral high-strain zones formed syn- to post-D₃ deformation, which were the focus of extensive premineralization metasomatism (quartz flooding, sericitization, chloritization), within the limb domain of a regional-scale fold structure. These zones evolved through post-Athabasca dextral and sinistral reactivation events, creating brittle fault linkages and dilation zones, allowing for hydrothermal fluid migration and resulting uraninite precipitation and associated alteration (white mica, chlorite, kaolinite, hematite, quartz veins). This study of the structural context of Arrow is important as it emphasizes that protracted reactivation of deep-seated structures and their subsidiaries was a fundamental control on uranium mineralization in the southwestern Athabasca basin.

中文翻译：

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加拿大萨斯喀彻温省西部阿萨巴斯卡盆地箭铀铀矿的地质，结构分析和共生作用：对帕特森湖走廊发展的影响

最近在加拿大萨斯喀彻温省北部阿萨巴斯卡盆地西南部铀矿化的重大发现，与沿NE-SW趋势构造带（称为Patterson Lake走廊）的一系列地球物理导体有关。箭头矿床（指示矿产资源：256.6 Mlb U ₃ O ₈；品位4.03％U ₃ O ₈）沿这一趋势发展，仅在塔尔森（Taltson）域的基底直生片岩中托管，并且是盆地中最大的未开发铀矿床。这项研究是对沿该走廊沉积物的首次详细分析，并研究了韧性框架与结构的脆性再活化，矿物共生和铀矿化之间的关系。来自数百个钻芯样品和薄片的共生信息与结构分析相结合，利用了超过18,000种各种结构特征的测量结果。Arrow的结构系统被解释为复杂的Riedel式几何结构的，以走滑为主的，易碎的延性断裂系统。该系统沿与D后₃形成的亚垂直，从NE到SW趋势的右旋高应变区开发。变形是区域规模褶皱结构的肢体域内广泛的矿化前交代作用（石英驱，绢云母化，氯化）的焦点。这些区域通过阿萨巴斯卡大地震后的右旋和左旋再活化事件演化而来，形成了脆性的断层联系和扩张带，允许热液运移并导致铀矿的沉淀和相关的变化（白云母，绿泥石，绿泥石，高岭石，赤铁矿，石英脉）。对Arrow的结构背景的研究非常重要，因为它强调深层结构及其子实体的长期再活化是西南阿萨巴斯卡盆地铀矿化的基本控制。