A search for possible economic sandstone-hosted uranium mineralisation formed within Tertiary and perhaps also the underlying Mesozoic strata in the Lake Coonee area, located in the Strzelecki Desert 140 km north-west of Broken Hill, has proceeded using geophysical methods to locate buried palaeochannel sediments. Within the now relinquished portion of the northern block, one of two blocks that constitute the subject licence, a ground gravity survey was conducted during June 2009, with 742 stations read on a 500 m x 500 m grid. Several anomalies of interest were defined, which may represent basement features as well as younger palaeochannel fill. However, Marmota has subsequently concluded that the relinquished area has less prospectivity for uranium than the retained part of EL 4252.