Exploration for possible economic IOCG type base and precious metal deposits in buried basement rocks, and for possible roll front style sedimentary uranium mineralisation in overlying Jurassic-Cretaceous Eromanga Basin sediments, within an area centred about 90 km south-east of Oodnadatta, has used geophysical and geochemical methods to delineate likely drilling targets. The area was selected because there appeared to Metex Resources to have been no previous drilling in the area covered by the Blyth Creek tenement. The thickness of post-Permian cover above potentially prospective strata was expected to increase from 20-50 m in the west to >300 m in the east. Initially, a review and data compilation of open-file reports (for areas covered by EL 3680 and five others in Metex’ Gawler Project) was carried out by John Beeson of Jigsaw Geoscience Pty Ltd. He summarised all previous exploration activities, which have consisted of mapping and geophysical surveying addressing potential IOCG mineralisation, diamondiferous kimberlites, and roll-front uranium. The results of previous gravity surveys were interpreted as precluding the existence of large-scale IOCG systems on the subject tenement, although it was thought that smaller-scale IOCG systems might be present at the eastern margin of the Peake and Denison Range, under relatively shallow cover. Of interest was one report stating that historical exploration for uranium had discovered minor carnotite mineralisation in post-Permian sediments examined along the eastern edge of the Peake and Denison Range. Next, a compilation of open-file geophysical (airborne magnetics and radiometrics, gravity, ground geophysics) and remotely sensed (Landsat, SRTM) data was carried out by Southern Geoscience Consultants. This work included an evaluation of the data and recommendations with respect to what mineralisation styles could exist on the licence. Atlas Geophysics were contracted during June-July 2007 to acquire infill gravity coverage to PIRSA's Northern G2 Corridor 1.5 km x 1.5 km regional gravity survey. 935 stations were read at a regular 750 m x 750 m spacing. The new gravity data revealed a number of structural lineaments and discrete anomalies that interpretation suggested could represent IOCG targets, although Metex believed that further density modelling was required in order to minimise the risk of drilling into too deep cover. Minor soil sampling (6 samples), rock chip sampling (1 sample) and groundwater sampling (9 samples) was carried out in the vicinity of surface uranium radiation highs discerned on the regional ternary radiometric data image. During licence Year 2, further geophysical modelling was carried out by John Beeson, who also updated the Blyth Creek IOCG exploration model with refined geological and geophysical criteria based on inputs from newly published research. His work resolved that four new but low priority IOCG targets existed there, all with probable source depths >800 m. It was suggested that the dense source bodies could be gabbroic or lamprophyric intrusions that cross-cut the north-northwest aligned basement rock sequence on an east-northeasterly trend. It was recommended to Metex that more closely spaced gravity data would be necessary over the target gravity anomalies, to lessen uncertainty surrounding the basement depth estimates. After conducting additional reviews of the available gravity data for EL 3680 during licence Year 3, the structurally complex linear gravity high at Target BC4 was proposed by Jigsaw Geoscience as meriting detailed gravity coverage, since the cover thickness there could in fact be 2 mm particle size fractions, to submit for multi-element geochemical analysis. The assay results were generally low, with slight value differences in some elements returned by the two fractions. During licence Year 6, Energia completed the drilling at the BC4 target of a single vertical rotary mud/diamond tailed hole to a total depth of 144.3 m (99 m precollared; 45.3 m HQ cored) during July 2012. The drill programme was in part funded by the State Government's PACE Initiative as an approved collaborative drilling project (DPY7-26). Top of basement in hole BC4DD001 was reached at a much shallower depth than expected (92 m, versus ~250 m prognosed), and the subsequently drill cored mafic igneous rock (sheared gabbro/amphibolite with an average SG of 3.0-3.1) penetrated below the Cretaceous Cadna-owie Formation was thought to be responsible for the geophysical anomaly. No significant anomalous geochemistry was returned from drill sample analyses carried out via both hand-held XRF spectroscopic instrumental scans and laboratory wet assay methods. The maximum copper value returned was 765 ppm Cu from the depth interval 136-137 m; the maximum uranium assay result was 4.3 ppm U. Minor visual copper mineralisation (malachite/azurite) was noted from sandstone drill cuttings recovered from throughout the Cadna-owie Formation, but XRF scans of the cuttings revealed only trace to elevated copper and some other base metals content apparently associated with finely disseminated magnetite. No further drilling was recommended. No work took place on the subject EL 5112 during its final year of tenure (2012-13), before it was decided to surrender title to the ground.