A large area situated at a varying, 15-30 km distance to the west, north-west and north of Mount Grainger has been explored for possible sediment-hosted gold, after the licensee used research conducted by CODES at the University of Tasmania (UTAS) to identify gold bearing target areas within the Adelaide Geosyncline which appear to have favourable structural settings. The CODES study had investigated elevated levels of gold formed within pyrite through geologic time, to estimate the ages of periods of peak gold emplacement and resultant erosion/weathering, and therefore to identify sedimentary basins which are likely to be sources of economic amounts of shed gold mineralisation. Their work done using samples from the Nackara Arc region identified strata of the Ulupa Siltstone (542–590 Ma depositional time range) as falling inside one of six time periods recognised as more prospective for the occurrence of this type of gold mineralisation. Taking evidence from world class sediment-hosted gold deposits already found around the globe, such as 962 Mt Sukhoi Log in Russia, large antiformal trap sites in this particular region were targeted because there the prospective host strata have been brought close to the surface. Recently, the licensee's parent company DGO Gold Limited had entered into an agreement with CODES and UTAS to fund a research project in order to access the research findings and supporting database. During the first licence year, Yandan Gold Mines (Yandan) compiled and reviewed past exploration reports and data, including remote sensing data, to inform planning of its work programme. The Mergenia area was found to have reported weakly anomalous gold and base metal mineralisation revealed by historical drilling (Paratoo prefix holes, 1993 SAEI / MESA - run ORROROO [mapsheet area] bedrock drilling campaign), and it had previously been noted by SADME in 1987 that probable sediment-hosted gold mineralisation is present in a similar geological and structural setting at the nearby Mount Grainger Goldfield. During Licence Year 2, a structural interpretation of available open file magnetic and gravity data was conducted by Yandan’s consultants, Terra Resources Pty Ltd and Clare Geological Services Pty Ltd, and was applied to target selection. It was recognised that Yandan's Dawson Project tenements occupy a structural position in the Nackara Arc where the fold trend flexes from a N-S to a NE-SW alignment, reflecting disturbance of Delamerian fold axes. The axial plane flexure was interpreted to occur where the folds meet a pronounced NW trending magnetic lineament. In addition, features shown on magnetic images and borne out by sparse drilling records also pointed to the presence of potentially influential igneous intrusions within the project area (as magnetic lows) that could represent hydrothermal heat sources. Lastly, the Ulupa Siltstone within the Dawson Syncline displays higher than typical magnetic attenuation that it was though could possibly represent pervasive alteration. A portion of the eastern limb of a broad anticlinal fold, one of three priority targets identified by the geophysical data interpretation, lies within the subject EL 5877. Most of the folded bedrock is covered by recent surficial sediments. Known gold mineralisation at the Mount Grainger Goldfield broadly occurs along the western limb and in the fold closure of an antiform that generally trends parallel to the antiformal structure that passes northwards into EL 5877. The mineralisation at Mount Grainger is described as structurally controlled, being associated with drag folding and shear jointing. Kaolinisation and sericite alteration around veining is evident. The Dustholes workings situated further west along the fold limb have gold occurring as saddle veins, as pods or lenticular bodies in the cores of parasitic folds, or as shear fracture infill veins. During Licence Year 3, after further considering the above interpretation and doing more background reviews of past drilling results, Yandan concluded that the potential of the project area to have world-class size, i.e. >1 Moz recoverable gold mineralisation on the scale of the Sukhoi Log system had been downgraded, however, the new research had demonstrated that the elements necessary for the development of sediment-hosted gold deposits are present. During a field trip made in July 2018, 4 rock chip grab samples were collected from outcrops of Ulupa Siltstone visited within EL 5877. No assay values of interest were returned. Because of the changed outlook concerning the gold deposit size likely to be found in the Mergenia area, it was decided to fully surrender the licence.