Previous investigations of the Late Tertiary Murray Basin shallow marine littoral zone clastic sedimentary sequence (Loxton and Parilla sands) for heavy mineral sand (HM) placer accumulations have discovered numerous occurrences of economic to sub-economic amounts of heavy minerals (ilmenite, rutile, zircon, leucoxene and monazite) within strandline mineral assemblages dominated by goethite. However, in the project area over time it has become evident that offshore or nearshore, shoal type deposition of mineral sands can often provide targets of greater width and thickness than the typical strandline mineralisation. Orebodies of this type also typically contain an elevated zircon content. Consequently the aim going forward was to evaluate these targets in untested places and to suitable drilling depths to prove their potential. During an 18 month long period between January 2011 and July 2012, Murray Zircon completed 1102 vertical open holes for 28,433 m, and submitted 8559 selected downhole sediment samples to a laboratory for heavy mineral assaying. Exploratory work was conducted in 5 main areas: - regional Traverse T1, looking for strandline extensions in the east of EL 4017. Some HM anomalies were found at the northern end of T1; - regional Traverse T2, aimed at gathering broad stratigraphic information on ELs 4017 and 4018. No HM were encountered; - delineation drilling on the Mindarie B trend located on EL 4017 between the Mindarie A2 and Mindarie C mining leases, which enabled the calculation of a preliminary resource estimated as 12.5 Mt @ 3.0% HM; - investigation of previously identified HM mineralised trends on EL 4016 in the Perponda - Karoonda area, which allowed for defining six separate occurrences; - a regional stratigraphic drill traverse located on EL 4018 near Wunkar, which discovered significant HM mineralisation in the first hole and therefore shifted emphasis onto doing delineation drilling of that occurrence. In April 2012, Murray Zircon received regulatory approval of its Program for Environmental Protection and Rehabilitation (PEPR) from DMITRE of South Australia. This approval allowed for the resumption of heavy mineral sands mining at the Mindarie mine, which began on the Mindarie A(2) and Mindarie C strandlines in December 2012 (see MESA Journal 68, page 7). Whilst assessing the HM prospectivity of Renmark East EL 4363, the potential for bentonitic clays was considered, and this area was flagged as prospective in view of recent results from drilling and assaying of material from the nearby Victorian tenement EL 5219. Further support for the presence of an economic deposit of bentonitic clays was gained in reading the results from an airborne EM survey conducted in 2004 and reported in CRC LEME Open File Report 179. During 2011, joint venturer Gold Fields Australasia's ongoing exploration work targeting buried orogenic gold deposits within the Delamerian Orogen focussed on appraising the Wynarka target on EL 4016, by putting in 3 holes for 258 m using a combination of aircore, RC and rotary mud drilling methods. Due to difficult ground conditions, all of the holes failed to reach basement, and the rest of the proposed drill program was postponed. Other work consisted of acquiring a 181 station roadside semi-regional gravity survey within ELs 3786, 4016 and 4017. During the 2012-2013 project reporting year, Murray Zircon undertook HM resource upgrade definition drilling work at the Wunkar, Perponda - Karoonda, Halidon and Mercunda deposits, plus regional exploration drilling work elsewhere. Drilling comprised 2573 aircore holes for 69,687 m. A total of 98 Mt of newly identified Indicated and Inferred Resources (in accordance with the 2012 edition JORC Code) were defined, increasing Murray Zircon’s total resource base of measured, indicated and inferred resources by more than 57% to 269 Mt. Mineralogical assessment of the new deposits indicated that they contain 220,000 t of zircon, 210,000 t of ‘HiTi’ minerals, and over 500,000 t of ilmenite. Samples of a bentonite rich clay recovered from 26 m depth in hole MZX2260 during the regional Swan Reach / Waikerie drilling were provided to the Geological Survey of South Australia for analysis of their clay content. The results indicated that the material is not a pure bentonite clay. A number of iron pisolite samples were collected in the Wynarka - Karoonda area and assayed for iron and trace elements. The intent of this work was to develop a mechanism for detecting basement hosted mineralisation through the transported cover. A meeting with representatives of the Geological Survey of South Australia and DET-CRC PhD candidate Stephanie McLennan was held to discuss the results of the pisolite assaying. It was advised to Murray Zircon by the geochemist experts that taking this simplistic exploration approach further was unlikely to succeed. A number of drillhole intersections made within the base of the Nindethana deposit during the Perponda - Karoonda HM exploratory drilling showed that a black manganese oxide coating has formed on the grains of coarse ‘surf zone’ sediments over thicknesses of 1 m to 2 m : a matter of minor curiosity. During the project 2013-2014 reporting year, Murray Zircon undertook near mine exploratory drilling consisting of 21 holes for 447 m along 4 traverses. All of the holes were wireline logged with a gamma ray tool to assist with identifying the limits of sand lenses. The drilling of holes as close as 50 m apart ruled out any chance of extensions existing to mineralised strandlines at any of the Mindarie A, Beauval, Calais or Dunkirk targets. New resource estimates were prepared by an external agency, GNJ Consulting, for the Perponda - Karoonda and Wunkar deposits due to issues that were identified in the resource definition drillhole HM sample assay data and mineralogical determinations that had been used for the original resource estimates made in the previous year. The corrections to the data required the complete re-assay of all 12,000 samples by Diamantina Laboratories because of errors made in their original work, for which undertaking, plus the resource re-calculations, that contractor bore the costs. A total of 150 Mt of newly identified Indicated and Inferred Resources were defined in accordance with the JORC Code for Perponda South, Braemar, Nindethana and Wunkar#3. These new resources form only a portion of the total potential of the four deposits, which all remain open in both directions of strike. Past exploratory drillholes located along a number of lines outside the areas of identified resources have encountered HM grades and mineralogy consistent with the portions of the deposits that have so far been defined, providing scope for a further expansion on these newly identified resources. In conclusion, Murray Zircon stated that its work performed over the past four years had consolidated its view that the geological mechanisms which have driven the historical concentration of HM within this part of the basin are likely to restrict any deposits hosted there to contain grades and thickness, with attendant strip ratios, that are no better than those already discovered. However, it was hoped that there remains significant prospectivity on the company's exploration tenure for finding similar type additional resources, along strike of those resources recently defined, and in other lightly drilled areas where significant anomalous accumulations of HM are known to exist. During the project 2014-2015 reporting year, Murray Zircon performed a minor amount of drilling work near the Mindarie mine, looking for mineralised lens ‘repeats’ at regular spacings to the northwards from the main orebodies, but mainly concentrated most of its drilling activity at prospects with little or no prior drill coveragethat are located in the south-west and west of its wider tenure, overall completing 252 holes for 8350 m. No new significant accumulations of heavy minerals were detected, although some mineralisation was detected on most of the greenfields traverses, having a low grade and poor mineralogical assemblage. The best result came from drilling done 13 km along strike to the south-east of the Perponda South deposit, where a traverse of 14 holes revealed perhaps 15 to 17 Mt @ ~4.5% HM with ~20% zircon, in an accumulation that is 150 m to 200 m wide and 2.8 m thick. The disappointing exploration results coming from places distal to the established resources spurred the company to plan a significant reduction of its ground holdings in the near future. During the project 2015-2016 reporting year, no field work was done. During the project 2016-2017 reporting year, no field work was done. After the reporting period, between July through September 2017, partial surrenders were made to ELs 4947, 5223, 5321 and 5358 [indexed separately]. During the project 2017-2018 reporting year, exploration activities on the Murray Basin Project resumed, with an exploration drilling program completed over the south-eastern end of the Perponda South strand resource. Of the 12 lines planned to test the strand, only 5 were completed due to land access issues. A total of 56 aircore (AC) holes were drilled for 1962 m. A total of 342 samples were submitted for laboratory assay. Drill lines were on an approximate 1 km spacing with holes spaced between 25-30 m apart. The maximum HM value was 11.9% HM, with the mean value for the assays submitted 2.7%. Heavy mineral (HM) mineralisation was intersected along all 5 lines, with the drilling potentially extending the strand a further 15 km to the southeast and remains open.