Supplementary data for "Age, Geochemistry and Radiogenic Heat Production of Felsic Intrusive Rocks from the Eastern Athabasca Basin, Saskatchewan" GSC Open FIle

This research builds on a recent study from the southwestern Athabasca Basin, which identified a large pluton linked to the 1.85–1.80 Ga high heat-producing Hudsonian granitoid suite as a key component of the local uranium ore system. Here, we test a similar hypothesis in the eastern Athabasca Basin, where uranium deposits are proposed to coincide with a zone of elevated heat production near the boundary between the Wollaston and Mudjatik domains of the Hearne craton. To investigate, we collected samples of felsic intrusive rocks from uranium deposits and discoveries along a transect across the Wollaston–Mudjatik Transition Zone (WMTZ), and assessed their age, geochemistry, and radiogenic heat production capacity to evaluate affinities with the Hudsonian suite. Although a single syn-orogenic granite sample south of the present-day basin margin yielded an age of 1826 ± 3 Ma and may represent a typical Hudsonian intrusion, other samples assumed to be Hudsonian were determined to be older Paleoproterozoic granites (ca. 1.875 Ga) or metamorphosed Neoarchean granites (2.58–2.67 Ga). Radiogenic heat production values mostly fall within global averages for granite and upper continental crust (1.6 – 3.5 µWm-3), although pegmatitic samples are elevated relative to nearby granites. Whereas the data are equivocal in defining a high heat-producing corridor within the WMTZ, new metamorphic ages from zircon rims (ca. 1.83, 1.81, 1.77 Ga) decrease from southeast to northwest across the zone, and highlight its role as a long-lived thermotectonic and structural boundary.

This data repository includes the geochemistry (Table S1) and SHRIMP zircon U-Pb (Table S2) data for the corresponding Geological Survey of Canada Open File report

本研究基于阿萨巴斯卡盆地西南部的一项近期研究展开，该研究将一处与1.85–1.80 十亿年（Ga）高放射产热的哈德逊期花岗岩类岩套相关的大型深成岩体，确定为当地铀矿系统的关键组成部分。本次研究在阿萨巴斯卡盆地东部验证了类似假说：该区域的铀矿床被认为与赫恩克拉通沃拉斯顿地块与穆贾蒂克地块边界附近的高热产异常带相吻合。为开展相关探究，研究团队沿沃拉斯顿-穆贾蒂克过渡带（WMTZ）剖面，采集了铀矿床及矿点的长英质侵入岩样品，并对其年代学、地球化学特征与放射产热能力进行分析，以验证其与哈德逊期岩套的亲缘关系。尽管在现今盆地边缘以南采集的一件同造山花岗岩样品获得了1826 ± 3 百万年（Ma）的定年结果，可作为典型的哈德逊期侵入体，但其余被初步归为哈德逊期的样品经鉴定，实为更古老的古元古代花岗岩（约1.875 Ga）或变质新太古代花岗岩（2.58–2.67 Ga）。样品的放射产热值大多处于全球花岗岩及上陆壳的平均范围（1.6 – 3.5 µWm-3）内，不过伟晶岩质样品的产热值显著高于附近的花岗岩体。虽然本次研究数据未能明确界定WMTZ内的高热产异常带，但锆石边部获得的新变质年代（约1.83、1.81、1.77 Ga）沿该带从东南向西北逐渐降低，凸显了其作为长期存在的热构造与构造边界的重要作用。
本数据集仓库包含对应加拿大地质调查局公开文件报告中的地球化学数据（表S1）及SHRIMP（敏感高分辨率离子探针质谱）锆石U-Pb定年数据（表S2）。