HIGHLIGHTS
- Located ~20km south of the highly radiogenic region of the historic Radium Hill Uranium Field (2.6Mlbs@1,310ppm U3O8)
- Hosts five uranium prospects that were abandoned due to market conditions in 2011 with uranium mineralisation at depths of ~80 to 110 metres
- Established NTMA agreement with the Wilyakali Native Title Aboriginal Corporation
Overview
The Radium Hill South project covers an area of 797 square kilometres and is located on the northern margins of the Murray Basin in South Australia. It is located approximately 20 kilometres south of the historic Radium Hill Uranium Field and directly north of tenure recently awarded to Boss Energy Ltd (ASX: BOE). The Project is in prime position in a district that is emerging as another South Australian hot-spot for sedimentary-style uranium deposits.
Figure 1: Pirie Basin Project and nearby Uranium deposits
Geology
Sediment-style uranium mineralisation is believed to have formed from oxidised groundwaters draining from the Willyama Supergroup basement rocks from the Radium Hill Region. The interaction of these uranium-mobilising fluids with a sedimentary system that contains reduced carbonaceous clays and sands provides the potential for redox-controlled uranium mineralisation.
Since acquiring the project, Orpheus has uncovered a regional east-northeast trending redox-corridor interpreted as a significant fluid pathway and potential control on uranium mineralisation. The corridor is almost perpendicular to the north-south trending sedimentary channels and deltaic sequences identified by previous explorers.
Orpheus’ work highlights the potential for a new discovery within Radium Hill as historic drill spacing exceeds the dimensions of a “stacked” uranium roll-front mineralisation system, whilst the REDOX corridor provides abundant target locations.
Exploration
Orpheus plans to systematically re-evaluate the project area using a combination of historical datasets, such as Fortescue’s regional gravity surveys and legacy downhole geochemistry, and modern geological modelling. By integrating this data with its internal expertise in sedimentary uranium systems, Orpheus aims to identify overlooked mineralised zones and untested redox fronts.
The immediate focus will be on refining high-priority drill targets through structural interpretation, gravity data reprocessing, and stakeholder engagement, with the goal of advancing toward a maiden drilling program that could define South Australia’s next uranium discovery.