Exploration of two adjacent very remote desert areas located 200 to 220 km north of Cook has targeted possible buried heavy mineral sands marine placer accumulations that may have formed along an arcuate DEM feature interpreted as a Tertiary shoreline system. This topographic high is geographically situated immediately north of the Ooldea Range, and on the projected north-westwards strike extension of the Barton Range. No mineral exploration has previously occurred in this basin marginal location, which is bounded over a large extent to the north and west by the Mamungari Conservation Park [previously called the 'Un-named Conservation Park']. During the initial year of the licences' tenure, work comprised a desktop review of the mineralisation potential, undertaking an Aboriginal cultural heritage clearance survey, and the conduct of a reconnaissance field trip to assess field access logisitics and proposed drilling sites. In recent times several phases of petroleum exploration targeting Officer Basin sediments have occurred in this region, the most recent concluding with drilling of two wildcat wells by Rodinia Oil Corporation (ROC), including the Mulyawara-1 well within EL 5045. ROC upgraded the local Maralinga Tjarutja Aboriginal business road running between the Oak Valley community and the SA/WA state border, and in addition constructed an all-weather road to service the well sites, greatly improving access to the subject tenement areas. A series of 8 km spaced seismic lines traverse them, affording ready access for reconnaissance drilling. Previously, heavy mineral sands (HM) exploratory traverse drilling performed by Iluka Resources on their now surrendered ELs 4325 and 4327 prior to 2011 had been carried right up to the southern boundaries of both of the subject Lost Sands tenements, and had reported thin and isolated but fairly significant grade HM intersections in four of their drillholes. It was thought by the licensee that the existing drilling coverage may not have fully tested the marine sand sequence in the region, which may not be barren or severely reworked as Iluka had said. During the second year of tenure, following a further review of the HM prospectivity of both subject licences that represented just one part of the wider Lost Sands tenement holdings in the Eucla Basin, it was decided to fully surrender EL 5046 (the eastern, Noorina Area 2) based on the conclusion that the observed DEM feature there does not reflect a prospective palaeo-shoreline setting. The licence surrender was accepted by DSD with effect from 3/10/2014. On EL 5045 to the west, Lost Sands performed a small, 17 hole vertical aircore drilling campaign during October 2014 that encountered a well-developed, 3 km wide Barton Range beach facies sedimentary sequence running along the DEM feature, confirming that it does represent a former shoreline, but no HM mineralisation was intersected and hence there must formerly have been no effective trap sites present. A total of 248.5 m was drilled along three traverses - two of the traverses, with widely spaced holes, tested an interpreted SW facing embayment feature in the NE of the licence area, but it was found to be devoid of marine sands, with older Hampton Sandstone bedrock lying at only between 5 and 10 m depth. The drill cuttings were sampled at 1.5 m depth intervals and were visually scanned for estimating their HM content. Because of the disappointing drilling results, and the downgrading of the HM potential of EL 5045 (Noorina Area 1), this tenement too was fully surrendered with effect from 28/1/2015.