An area centred ~ 60 km east of Tailem Bend has been explored for possible economic buried Tertiary marine placer heavy mineral sand (HMS) deposits that may have been formed within the Murray Basin sedimentary succession, as winnowed strandings that were deposited along Late Miocene to Late Pliocene regressive shorelines. During the first licence year, as part of a wider reconnaissance stratigraphic drilling programme conducted in the region, 29 vertical open aircore holes were drilled during August 2012 along parts of seven regional traverses, for a total penetration of 1089.5 m. Some of the drilling was close-spaced at 80 m hole separation over two magnetic targets thought to represent multiple adjacent palaeo-beach strandlines, in the style of WRP. Minor HM (<3%) was intersected in numerous holes, but most of the mineral assemblage observed in HM separates consisted of trash minerals such as tourmaline and iron-bearing species. A best intercept of 24 m @ 0.3% HM was recorded from hole S01739, occurring within dunal and foreshore facies indurated Loxton-Parilla unit sands. During June and July 2013, a second drilling campaign was conducted to follow up thick (up to 30 m) low grade (<0.5% HM) intercepts related to Tertiary dunal and foreshore facies sands occurring along a section of the exposed Marmon-Jabuk Ridge, and to explore a new target located along the Marmon Jabuk Scarp, involving postulated reworking of dunal sand HM mineralisation during two separate marine transgressions in the Quaternary. 69 vertical holes for 4033.5 m were completed along three traverses at intervals of 200 m to 300 m, and 123 selected drill cuttings samples were submitted for laboratory heavy mineral analysis. Best results included 33 m @ 0.4% HM from below 24 m depth in hole S01960 on traverse 072, and 10.5 m @ 1.1% HM from below 24 m depth in hole S01986 on traverse ST073. This drilling campaign helped to better define the geological interpretation of the targeted fossil beach ridge, whereby the thick sand package, that was again found to contain only minor HM in many holes, was re-interpreted as a dunal facies overlying marine sands. Only minor foreshore facies sands were found preserved in some places. The overall extent of drilling done on the licence was deemed as adequate to have tested the potential of the area to contain a large, Stradbroke Island style dunal HM deposit. In the third licence year, Iluka reviewed its exploration results, and concluded that the lack of well-developed foreshore facies sands, plus a lack of significant mineralisation containing valuable heavy minerals within the dunal facies, had reduced the perceived prospectivity of EL 4922. Therefore it was decided to surrender the licence.