On the genesis of Rabbit Lake and other unconformity-type uranium deposits in northern Saskatchewan, Canada

Rôle des facteurs hydrodynamiques dans le contrôle de la formation et de l’emplacement des dépôts d’uranium associés à des discordances: aperçus issus de la modélisation de transport réactif

“…at Dufferin Lake zone and Phoenix deposit); thus, methane, produced from dissolution of graphite, could be a reductant in the formation of URU deposits. Based on these findings and previous studies (Hoeve and Sibbald 1978;Bray et al 1988;Kyser et al 1989;Raffensperger and Garven 1995b;Aghbelagh and Yang 2014), the present work assumes a reducing condition is provided via hydrothermal alteration of graphite as follows.…”

“…1), the dip angle and direction of faults differ from one area to another (Finch 1996;Hajnal et al 2005). For example, in the McArthur River deposit, the major fault is a northeast-trending, southeast dipping, reverse fault (McGill 1999;Derome et al 2005); whereas in the Dragon Lake area, the major fault is a left-lateral strike-slips structure (Hoeve and Sibbald 1978), and in the Rabbit Lake deposit, the fault is a thrust type with a low dip angle (Hoeve and Sibbald 1978). Additionally, faults may become more permeable after reactivation (Lorilleux et al 2003;Dieng et al 2013), which is a common process in the Athabasca Basin.…”

“…Methane is first produced by the dissolution of graphite (Hoeve and Sibbald, 1978;Kyser et al 1989;Raffensperger and Garven, 1995b) at temperatures of typical URU oreforming brines (120-200°C):…”

Summary results of the Glens Falls CUSMAP project, New York, Vermont, and New Hampshire

“…Tourmaline is also a gangue mineral in uranium deposits elsewhere, especially those of the unconformity type in the Athabasca basin, Canada (for example, Rabbit Lake deposit). In contrast to the Ludlow occurrence, however, uranium mineralization at Rabbit Lake contains anomalous abundances ofNi, Co, Cu, Zn, V, Ag, platinum-group elements, As, Bi, and Se (Hoeve and Sibbald, 1978).…”

A possible mechanism of wall-rock hematitization in uranium deposits: Radiation-induced oxidation of ferrous ion.

“…Hematitization alteration of wall-rocks commonly occurs in various types of hydrothermal uranium deposits (Cuney, 1978;Hoeve and Sibbald, 1978;Roberts and Hudson, 1983;Gauthier-Lafaye and Weber, 1989). Even up to now, however, no de cisive conclusion has been attained on the mechanism of the wall-rock hematitization.…”