An area centred ~70 km east of Oodnadatta has been explored for possible buried economic giant Broken Hill type (BHT) stratiform Pb-Zn-Ag deposits which might be contained within strongly deformed and metamorphosed Palaeo- to Mesoproterozoic metasediments and metavolcanic rocks, within an effectively previously untested basement setting located north-east of the Peake and Denison Inliers. Here the metamorphic basement is covered by Mesozoic sediments of the Eromanga Basin, with the Cretaceous Oodnadatta Formation forming most of the outcrop on EL 5514. However, the ground surface over most of the licence area is covered by Tertiary and Quaternary alluvium and colluvium. Prior to the grant of the two project licences, a geological interpretation of the basement rocks in the project area was completed by Dr Douglas Haynes of Douglas Haynes Discovery Pty Ltd, using public domain geological and geophysical data. The interpretation was carried out in a GIS environment, and used public domain geological and geophysical data for the Broken Hill Block as a reference. It identified a main target area in the west of EL 5514 where inferred Broken Hill Group equivalents display strong deformation in the form of folded iron formations with short strike length and curvilinear magnetic signatures. Similar deformed iron formations are found at both Broken Hill and Cannington. These interpreted iron formations formed the focus for planned subsurface exploration on the tenement, since previous exploration in the area had not drill tested any of the features which were now considered to be banded iron formations or magnetite-bearing pelitic units proximal to base metal mineralisation. Two generations of folding were interpreted on EL 5514: (1) early broader folds with long north-west axial trends, and (2) late tighter folds with shorter north-south trends. Faulting in the area also appeared to parallel the early fold axial trends and lithological domain boundaries. Using the Broken Hill deposit as the prime analogy, it was expected that any BHT mineralisation would most likely occur on the limb of a late fold. In addition, the existing aeromagnetic data showed some prominent high amplitude, long wavelength anomaly signatures in the southern part of EL 5514, on the north side of a late granite body. These features were interpreted as denoting possible magnetite enrichment accompanying IOCG alteration. Similar alteration had previously been interpreted just to the east of EL 5514 over the Toby target which was drilled in 2004 by Platsearch (TBY-1). Exploration activities undertaken by BHT Minerals during the first licence year included the compilation of historical exploration data and a review of open file geophysical data, and the acquisition of a helicopter-supported airborne magnetic/radiometric survey and a ground gravity survey. The helimag/rad survey, totalling 1555 line km, was flown during August 2015 over two areas of inferred Broken Hill Group equivalent basement rocks, along east-west flight lines spaced 200 m apart, using a 30 m mean sensor elevation above the ground surface. The gravity survey of 363 stations was read during October 2015 on three separate 200 m x 200 m grids. The gravity grids were centered on high amplitude magnetic features thought to represent IOCG-style targets. However, the survey data revealed that the <2 mGal amplitudes of the mapped density anomalies might not represent copper mineralisation typical of IOCG deposits found throughout the Gawler Craton. Initial geological interpretation of the processed new potential field data defined probable broad target areas of inferred Broken Hill Group stratigraphy, which appeared to display remarkably similar geophysical signatures to those of the metamorphic rocks within the Broken Hill Block of NSW and the Cannington area of QLD. Depth to magnetic source (Naudy) modelling confirmed the pre-Adelaidean basement depths found nearby in sparse previous drilling, and indicated that such depths in the prospective western part of the licence area might be in the order of 150 - 400 m. These depths were considered suitable for cost-effective exploration. In April 2015, BHT Minerals was successful in being granted PACE Initiative Year 8 Discovery Drilling industry/government collaborative drilling project subsidy funds by DSD, under approved project number DPY8-04, to enable exploratory rotary mud and diamond tailed drilling to proceed within EL 5514 to further the geological understanding and prospectivity of this area. During the second licence year, BHT Minerals drilled 5 combined mud rotary / NQ diamond cored vertical holes for a total penetration of 1370.2 m, including 158.6 m of coring, during April-July 2016, to test five separate targets. Three of the holes were partly funded by PACE. Post-Mesoproterozoic basement rocks were encountered in every hole, and the targeted discrete magnetic anomaly was explained for each. The package of basement rocks encountered comprises a sequence of low-grade metamorphosed metasediments together with basalt and dolerite. Both high and low-temperature rock alteration assemblages were noted, with a likely genetic relationship suggested between potassic (biotite-magnetite) assemblages representing a proximal alteration facies produced by a relatively higher flow of hydrothermal fluid (in holes WD16-01, 16-04 and 16-05) and a lower temperature sericite-chlorite-magnetite assemblage reflecting distal alteration which has formed in a situation far removed from this realm of fluid flow (in holes WD16-02 and 03). There is no significantly anomalous base or precious metal geochemistry evident within the drill samples analysed. The metamorphic grade of the drilled basement rock package is much lower than would be expected for a sequence prospective for BHT mineralisation, and consequently it was speculated that age of the package may be Neoproterozic or younger. No anomalous hand-held spectrometer logging results were identified within the Mesozoic cover sedimentary sequence, with a highest recorded value of 130 cps (WD16-02: 171 m and WD16-05: 10-12 m). No significant base or precious metal mineralisation was observed in logging of the post-Mesoproterozoic basement units, but minor visible base metal sulphides (chalcopyrite, chalcocite, galena), native copper and pyrite were noted in the cores of various holes. The pyrite-bearing hydrothermal breccia intersected in WD16-05, whilst appearing spectacular, only yielded highest assay values of 13 ppb Au, 301 ppm Cu, and 13 ppm As. Because the 2016 exploratory drilling had substantially downgraded the potential of EL 5514 to host a BHT deposit, it was decided that tenure of the area should be surrendered.