Oral Presentation Sub22 Conference

The Oolgelima Project is located 50km east of Coober Pedy, adjacent to the north of a distinct flexure in the Karari Shear Zone, a major crustal scale suture which transects the west and northern extent of the Gawler Craton, South Australia. The Project takes its name from a prominent circular feature in the magnetic potential field dataset, often referred to as the ‘Oolgelima Intrusive Complex’.

Previous exploration drilling at the Cadi Prospect within the Project area has identified highly anomalous base metal and rare earth element mineralisation, interpreted by previous explorers as geochemically affiliated to IOCG-style mineralisation associated with inferred Hiltaba Suite granite intrusions.

Rifle Resources has carefully dissected all previous company exploration information, including extensive digitization of drilling information and cryptic petrological reports, leading to the development and new mineral systems model for the Project: an Alkaline-Carbonatite Intrusive Complex.

This talk will touch on a previous ‘copper prospectivity’ synthesis that led to the identification of the Cadi Prospect and the subsequent acquisition of tenure by Rifle Resources. Geophysics, drilling, petrological and geochemical data will be presented to build the narrative in support of a carbonatite model.

Recent studies include HyLogger scanning and full suite geochemical analysis of RC chip samples from the only preserved drill hole in the core library – NC9202. Coarse comparisons will be made against the geochemical signature of other mineral systems.

The talk will conclude with the presentation of a new solid geology and prospectivity interpretation of the Oolgelima Project. This will highlight a series of critical minerals exploration targets, including a magnetite-carbonatite radiating dyke swarm, sub-circular discrete potential breccia pipes or mineralised magnetic intrusive plugs, a possible reversely magnetized layered mafic intrusive and a conventional structurally controlled 2.5 – 3 mGal conventional IOCG-style potential field anomaly.