An area comprising two separate blocks located ~20 km west and ~45 km north of Fowlers Bay has been explored for possible buried Pleistocene reworked heavy mineral sands (HM) marine placer mineralisation that may have become concentrated within the Nundroo Range. In mid-December 2015, with the assistance of a financial subsidy granted as part of the SA Government's PACE 2020 Discovery Drilling initiative, 9 open vertical exploratory aircore holes with a total penetration of 829.5 m were drilled by Iluka on the southern sub-block of the subject licence, at roadside locations which crossed the Nundroo Range. Here the target Bridgewater Formation was found to consist of well sorted, fine grained massive sands, and appeared to be up to 80 m thick. The drilling encountered HM in the lower part of the formation behind the range (i.e. near the eastern end of drill traverse EBT514 and close to the eastern boundary of the tenement), but no HM were intersected in front of the range. 236 selected drill cuttings samples were submitted for heavy mineral analysis; the best mineralised intercept was made in hole NDR014, of 12 m @ 1.66% HM from 69 m depth, including 1.5 m @ 3.7% HM from 70.5 m depth. The HM assemblage was determined to consist of 20-30% ilmenite, 10-30% altered ilmenite, 5-15% zircon, 1-2% rutile and 10-35% trash mineral species. This HM occurrence was deemed by Iluka to be uneconomic. In February 2016, passive seismic survey data were acquired along three east-west lines to try to map subtle variations in the depth to top of basement. They showed moderate correlation with known drillhole-indicated shallow basement to the east of survey lines, however, further to the west the seismic data correlation was poor, which was attributed to effects arising from clayey sand lenses within a generally massive sand package. Because of the perceived downgraded HM prospectivity within the very small retained portion of the licence, its tenure was allowed to lapse in September 2019.