An area centred ~25 km south-east of Woomera township is being explored for possible buried economic IOCG style mineralisation that may be related to a poorly defined gravity anomaly and associated magnetic anomaly in the vicinity of Lucas Hill. A search of recent PIRSA open file reports made by Tasman Resources showed the anomaly had lately been better defined by infill gravity surveying, but had not yet been drill tested. The subsurface depth of the anomaly source had been modelled at around 900 m. Previous drilling on the anomaly done in 1978 by CSR subsidiary Pacminex had penetrated to a maximum depth of 788 m, but had not reached Palaeoproterozoic basement (the potential host for IOCG mineralisation) expected to lie beneath the Mesoproterozoic Pandurra Formation. A secondary economic base metal target in this area, which could be present in the thick Adelaidean metasedimentary cover, is Mount Gunson style stratabound hydrothermal copper mineralisation. The Mount Gunson mine is located ~15 km south-east of Lucas Hill: here several large occurrences of copper mineralisation are localised at the contact between the Whyalla Sandstone and the Pandurra Formation, and within the Tapley Hill Formation. During Year 1 of tenure of EL 4770, Tasman Resources made a geological interpretation, commissioned geophysical modelling of existing open file gravity and magnetic data in the Lucas Hill area, and undertook deep diamond drill testing of the interpreted Lucas Hill IOCG gravity/magnetic target. The modelling work performed by Adelaide Mining Geophysics Pty Ltd (AMG) indicated that, taking an optimistic view, the source of the gravity and magnetic anomalies at Lucas Hill is likely to be a significant body of quite dense material (SG 4.5 to 5), which becomes more magnetic at depth. AMG modelled the subsurface depth of this body at about 1000 m. The size of the residual gravity anomaly mapped at Lucas Hill was seen to be closely comparable to the equivalent gravity anomaly at the Carrapateena IOCG deposit. Tasman's earlier geological interpretation had shown that the Lucas Hill coincident gravity and magnetic geophysical anomaly lies on and is aligned along a major west-northwest tectonic lineament that was originally defined in 1975 during WMC’s exploration that led to the discovery of the giant Olympic Dam IOCG deposit. During January-February 2012, two HQ/NQ2 diamond cored holes, LHD001 and LHD002, the first one directed vertically downwards and the second inclined towards the south-east, were drilled by Tasman Resources from the same surface drill pad location to test the Lucas Hill gravity/magnetic anomaly. LHD001 (RC precollared to 258 m depth) was drilled near the peak of the residual gravity anomaly and on the western edge of the highest density segment of the AMG gravity model. It entered Pandurra Formation at 613 m, and passed into Palaeoproterozoic basement comprising fine grained metasediments of the ?Wallaroo Group at 1128 m. In the recovered drill core, these metasediments display weak sericite-chlorite-calcite ± haematite ± barite alteration, locally grading into intense calc-silicate/skarn - like alteration having coarsely prismatic crystalline pyroxenes/amphiboles, carbonate, apatite and minor andradite garnet ± magnetite. Petrographic thin section examination of the drill core revealed that in its more intensely altered portions the original sedimentary laminations have been largely obliterated. A dense, generally medium grained mafic rock resembling a mafic dyke in appearance and consisting largely of actinolite with some calcite and coarse-grained apatite was intersected over the core depth interval 1216 to 1245 m. A sample of this rock assayed from the interval 1219-1220 m, which contains a 20 cm thick zone of visible weak disseminated chalcopyrite mineralisation , returned a copper value of 1 m at 0.14% Cu. The 5-metre drill core interval immediately below this zone (1220-1225 m), that also contains visible trace chalcopyrite, averages 0.12% Cu. Some of the intensely altered zones yielded elevated tungsten assay values of up to 237 ppm W, typically indicative of a skarn association. Below 1245 m the alteration is less intense, of chlorite - carbonate style, and original rock textures are generally preserved. Drilling was stopped at a depth of 1275.6 m. The targeted gravity anomaly was not explained by the lithologies encountered in this hole. Because the first hole had not been a success, hole LHD002 was collared on the same site a few metres away from LHD001, and was inclined at -73 degrees towards an azimuth of 121 degrees True, the intent being for this hole to penetrate basement approximately 300 m distant from the LHD001 intercept, close to the centre of the highest density portion of the AMG gravity model. LHD002 (precollared to 275 m hole depth) reached Palaeoproterozoic basement at 1152 m, and drilling was terminated at 1395.3 m hole depth. A strong deviation of this hole which arose in the precollar section steepened its later trajectory to an inclination of around -80 degrees; this accidentally imposed diversion from the planned hole design was unable to be easily rectified and hence, at its bottom, it was calculated that LHD002 finished around 30 m closer than anticipated to the LHD001 basement intercept. LHD002 intersected a similar sequence of variably altered metasediments to that in LHD001, with medium grained actinolite-rich, intensely calc-silicate altered rocks present towards the bottom of the hole, but none of the very coarse grained alteration was encountered, and the rocks cored have no strongly anomalous tungsten content. Highly visible chalcopyrite mineralisation associated with pyrite and arsenopyrite occurs at around 1320 m in an altered K-feldspar rich rock, with chlorite and carbonate. Drill core sample assays returned 0.38% Cu + 0.81% As over 1 m from 1319-1320 m, and 0.16% Cu + 0.13% As in the 1m interval above it. Some sporadic weak sulphide mineralisation (pyrite, chalcopyrite ± arsenopyrite) was also observed below this zone, towards the bottom of the hole. LHD002 also intersected a composite Gairdner Dolerite dyke (dolerite and minor basalt) from 630 to 687 m, that has intruded the Pandurra Formation and sits in contact with the base of the Tapley Hill Formation. When plotted geometrically, the actual depths required to reach the tops of the various stratigraphic units present in both these holes have confirmed that, at least locally, the cover sequence and the basement unconformity are flat lying. Density measurements made on the drill cores revealed that the average basement SG is ~2.8 g/cc, while the more calc-silicate rich strongly altered portions of the basement in hole LHD001 returned SG values above 3.0. In contrast, scant higher density material is evident in hole LHD002, which was drilled directly under the highest density portion of the gravity model. Tasman Resources' immediate deduction arising from these drilling results was that that the altered basement at Lucas Hill appeared to have some resemblance mineralogically to other, larger sub-economic copper discoveries in the Arcoona region, including Emmie Bluff and Punt Hill. The presence of coarse calc-silicate mineralisation and strongly anomalous W in one hole and high As in the other possibly indicated a local transition from a higher temperature to a lower temperature part of the mineralising system. However, the lack of drill validation of AMG's optimistic high density model of the gravity anomaly also suggested that the modelled pessimistic alternative of a wide zone (+1 km) of mafic rocks (but in this case IOCG - associated calc-silicate rock) rather than a haematite-rich orebody was a more likely possibility. Because of now reaching this view, which was coupled conceptually with the indicated deeper/hotter epigenetic setting that exists beneath very thick cover at Lucas Hill, Tasman decided that the results of its initial drilling had served to downgrade the prospect as a high grade IOCG target. No new work was performed during licence Years 2, 3 and 4. During licence Year 5, Tasman Resources digitised selected hard copy historic 1980s drillhole data for three adjacent Pacminex holes located close to Lake Windabout, which reportedly had encountered sub-economic stratabound copper mineralisation grading about 0.3% Cu within the Whyalla Sandstone. The drillhole logs describe intergranular chalcocite/covellite mineralisation which was observed within reduced (grey-white) Whyalla Sandstone. It was thought that this occurrence could be associated with an interpreted local thickening and perhaps downwarping of the Whyalla Sandstone. However, after considering the spacing of existing nearby drillholes that did not record any such similar mineralisation, the licensee later concluded that the potential for finding a related shallow economic copper resource underneath the lake within its tenement area appeared to be limited. 68 square km or ~26% of the original 264 square km area of EL 4770 were relinquished at year end as part of the process of renewing tenure for a second five-year term. During licence Year 6, no field work was done. Tasman Resources sampled stored past drillhole samples of the Whyalla Sandstone to allow consultant geologist David Tonkin of THZ Pty Ltd to perform a petrographic thin section examination of them, to compare the rock features with those of Whyalla Sandstone samples originating from the Mount Gunson copper mines. Because the Lucas Hill geophysical anomalies coincide with a previously recognised redox boundary within the Whyalla Sandstone, it was surmised by Tasman Resources that their footprint could represent a lower grade analogue of the economic mineralisation that had previously been found in the East Lagoon and West Lagoon deposits at Mount Gunson. In view of the possibility that the Lucas Hill anomalies might extend westwards towards or even into the adjacent EL 5152, Tasman Resources made a part-funding arrangement with that licence's owner THZ Pty Ltd to let David Tonkin investigate the anomaly further on the subject EL 5849 besides on his piece of ground. Preliminary petrographic observations appeared to confirm that the Lucas Hill copper occurrence was deposited from reduced fluids. In April 2017, via a second partial relinquishment request, 46 square km were excised from the western side of renewed EL 5849, so that it then covered a total area of 150 square km. No new work was performed during licence Years 7 and 8, before a decision was made in July 2019 to fully surrender tenure.