In an area centred ~40 km south-east of Coober Pedy, following its processing of open file GCAS aeromagnetic data (Region 8A/8B) using Vector Residual Mag Intensity (VRMI) and high frequency residual gradients, the licensee had identified two untested exploration targets in the form of magnetic lows lying immediately adjacent to magnetic highs. In the past, the local covered bedrock geology had been interpreted as an intrusive igneous mafic/ultramafic complex, based on rocks encountered by sparse previous drilling, and in part had been tentatively correlated with a carbonatite intrusion. That earlier drilling work had been undertaken within the Mount Brady region, but to the west of the current area of investigation; there are only two previous drillholes located in the vicinity of the current work. They resulted from work undertaken by CRA that was followed up by Peak Iron, who had identified potential for REE to occur in a possibly extensive eastwards continuation the mafic rocks. The area was also thought to be prospective for Prominent Hill style IOCG mineralisation associated with an isolated residual gravity target. For the subject approved ADI project, the two distinct magnetic signatures which are possibly denoting reversely magnetised layered ultramafic intrusive units were to be evaluated by drilling two 300 m deep fully diamond cored holes. This work was undertaken by contractor Titeline Drilling Pty Ltd during March 2022, when both north-westwards inclined holes, MTB22DDH01 and MTB22DDH02, were successfully drilled each to TD 300.6 m, for a combined total penetration of 601.2 m. Below 33 m downhole, and extending to 164.5 m, MTB22DDH01 penetrated a mafic granulite basement cut by minor dykes of mafic pegmatite derived from in-situ melting during peak metamorphism. This granulite's protolith lithology has been divided into two intrusive phases, based on observed fining of its crystal grain sizes. Within this rock mass rare disseminated fine grained sulphides occur, plus rare blebby sulphides. Over the hole interval 164.5-167.5 m there appears to be a significant truncating fault, defined by many laminar dykes of varying composition and an imposed foliation within the mafic granulite, as well as a tectonically emplaced laminar inclusion of an older granite. The fault is likely to be sub-vertical, aligned obliquely at a shallow angle to the drill-hole, and striking towards 340°. Below the fault zone the mafic granulite changes to one which is modified to include coarse orthoclase porphyroblasts. Petrology indicates that these likely xenoliths were entrained while the magma ascended, rather than signifying components of a true porphyry. The porphyroblasts were partially re-incorporated into the rock matrix during metamorphism, and in many instances only ‘ghost’ outlines remain. A minor portion of a granite stock was encountered near the base of the hole, over the cored interval 232.65 to 281.40 m. It is strong foliated, in contrast to the mostly undeformed mafic granulite, thus implying that it is an older igneous unit, and its appearance is consistent with that of granites found elsewhere within the Mount Woods Domain, e.g. the Balta Granite, because it has a distinctive red alteration of the K-feldspar. However, most of this last-described rock is now bleached white, presumably an effect of later metamorphism, with only the gradational colour contacts and ghosted foliation remaining to identify the protolith as the granite. Hole MTBDDH02 was collared at a site ~2 km south-west of that of MTBDDH01. Below 35 m downhole, it also penetrated a similar mafic granulite showing in the drill core some variability in texture, including orthoclase porphyroblast zones. Mafic and felsic pegmatite dykes are common throughout, derived from local melting during peak metamorphism, and sometimes containing blebby remobilised sulphides. A rubbly fault exists from 151.3-160.1 m, with shear slickensides in the margins indicating that the fault style has changed from semi-ductile to brittle. This fault dips at 75° and strikes north-eastwards. There is no granite present in this hole's drill core. It was found that the mafic granulite contains pervasive magnetite which explains the magnetic high anomalies. Remanent reversely polarised magnetism may also exist in the same rock, possibly locked in during peak metamorphism. The licensee has concluded that the chance of discovering a buried carbonatite intrusion at Mount Brady seems highly unlikely. The mafic petrology indicates that the primary rock type will have a composition like the Hiltaba age Curramulka Gabbronorite. The basement geology is consistent with that found in historical hole DD89EN 46, indicating that the apparent magnetic lows and high are related to the same intrusion, of ~2.7 km diameter. During logging of the recovered drill cores, it was noted that sulphides had often crystallised as part of the solidifying mafic intrusive rock, so the potential for ‘magmatic nickel sulphide’ mineralisation to occur therein was further investigated through petrology. 15 thin sections of selected mineralised drill core samples were examined and reported on. The consultant provided his opinions that the presence of magmatic sulphides is confirmed, and the sulphides are generally not all of hydrothermal origin. Hydrothermal pyrite was observed associated with chlorite, and the coarse blebby pyrite in the pegmatite ‘sweat veins’ was considered to be remobilised. The low nickel content of the sulphides was attributed to the observed degree of fractionation in the mafic intrusive rocks. It was thought likely that higher amounts of nickel will be concentrated in the unfractionated parent olivine bearing ultramafic phases of the magmatic complex. Laboratory multi-element assaying of 153 drill core samples was also undertaken. Again, the sampling was selective, to focus on intervals containing sulphides and to analyse representative basement rock types. Within the thin saprock weathering profile (32-37 m MTB22DDH01, 27-38.2 m MTB22DDH02) the silver content is quite elevated (to 4.5 ppm Ag), copper is slightly elevated (to 107 ppm Cu) and gold is anomalous (maximum 30 ppb Au). The mafic granulite in MTB22DDH01 yielded base metal maxima of 306 ppm Cu, 416 ppm Ni. Elevated REEs (276 ppm La, 553 ppm Ce and 185 ppm Nd) were obtained from a felsic pegmatite dyke cut in the hole interval 213-215 m, but copper and nickel were low within the dyke. The REE assay results were compared against those reported by Peak Iron from earlier hole DD88LR20, and have the same tenor, which is around one-fifth of being economic, so the pegmatites here could warrant more investigation. Hole MTBDDH02 also has slightly elevated REE, and in different places, elevated gold to 20 ppb Au. The perception gained was that the gold is being moved around in laminated chlorite-calcite veins to give a patchy distribution. This report includes suggested next steps for exploration.