The western two-thirds, or 427 square km, of an area located on the eastern side of the Nullarbor Plain, ~200 km north-west of Ceduna, has been partially relinquished because in the licensee's opinion it does not exhibit the geological features required for the accumulation of heavy mineral sands (HM). The area has been explored for possible buried economic occurrences of zircon-rich HM that may have been formed along palaeo-beach and shoreface strandlines during the five marine incursions that occurred from the Middle Eocene to the Pliocene. Winnowed sandy sediment horizons of the Hampton Sandstone and Ooldea Formation are the target host strata for these types of HM deposits. UTS Geophysics conducted a low level airborne magnetic/radiometric/DTM survey in the eastern Eucla Basin region over Iluka’s Fowler Project tenements during May and June 2015, which included coverage on the now relinquished area of EL 5110. The total coverage of this survey was 40,377 line km, flying NE-SW lines spaced 100 m apart, using a mean sensor height above the ground surface of 20 m. The radiometric raw data were processed by a consultant geophysicist into a number of composite and ratio plots using the uranium, thorium, and potassium bands. These plots were used to select radiometric anomalies for surface sampling and drill testing, which lay on interpreted shorelines located at the southern end of the Ooldea Range. Geomorphic and radiometric anomalies were followed up for finding possible buried heavy mineral sands strandline accumulations by part of a drilling campaign that was conducted on EL 6159 in September 2018, when 15 vertical open RC aircore holes were drilled for a total penetration of 849 m. The exploration rationale postulated that HM accumulations could be buried beneath younger cover that included substantial thicknesses of indurated limestone. Drilling targeted sands of the Hampton Sandstone and Maralinga Formation, two units which represent the siliclastic, nearshore facies of two marine transgressions in the Eocene. No marine sands were intersected along the two traverses that were drilled. 15 selected drill cuttings samples were submitted for HM analysis. During drilling, a number of magnetic anomalies having inferred sources within the thinly covered basement were tested to assess their potential for base metal mineralisation. A total of 65 bottom-of-hole drill cuttings samples were submitted for laboratory multi-element assaying.