Uranium ore-forming systems of the - Geoscience Australia

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Uranium ore-forming systems of the Lake Frome regionFigure 1.4: Basin- and surface-related uranium mineral systems, during the extensional stage of basindevelopment. A range of uranium depositional sites and deposit styles are represented in this basinscalediagrammatic section. Source: Skirrow et al. (2009).To apply the mineral systems approach to uranium in the Lake Frome region we first present a‘straw man’ model of basin-related uranium mineral systems in Figure 1.6, using the template ofFigure 1.2. This ‘straw man’ is based on published deposit and regional geological data. Implicitin this diagram is the concept of multiple working hypotheses for the formation of uraniummineralisation in the Lake Frome region. For example, multiple possible energy sources areincluded for completeness. The study aims to identify and map the geological ‘proxies’ (i.e.,observable geological features) for each of the mineral system components: sources, permeabilityarchitecture, energy, and depositional gradients.Page 7 of 151
Uranium ore-forming systems of the Lake Frome regionFour MileUFigure 1.5: Locations of uranium deposits, known paleochannels, geological domains and uraniumdeposits and occurrences in the Lake Frome region (modified after Curtis et al., 1990).Page 8 of 151
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