A very small area of ground, taken up mainly to cover the fold hinge of a large regional anticline of Ulupa Siltstone located ~25 km north-west 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. In this way it learned that the researched gold deposit style (variously categorised as orogenic, turbidite-hosted, and Carlin-type) is stratabound and discordant to bedding, and is comprised of disseminated pyrite (±arsenopyrite and pyrrhotite) concentrated in black shale, siltstone, carbonate, and sandstone sequences. Some of the world’s largest gold districts and/or deposits are of this type (e.g. Muruntau, Ashanti, northern Carlin Trend, Kumtor, Homestake, Sukhoi Log). Quartz veining may or may not be present, and the gold may be refractory (dissolved within arsenian pyrite or arsenopyrite) or occur as free gold or gold tellurides that have crystallised within metamorphic and/or hydrothermal pyrite, arsenopyrite, or associated quartz veins. The key criterion for discernment is that this mineralisation is hosted by sedimentary rocks and, in particular, carbonaceous mudstones or shales forming the tops to fining-upward turbidite cycles. During the first licence year, Yandan compiled publicly available past exploration data and public domain geological, geophysical and remote sensing data relevant to the subject EL 6269, to facilitate the CODES research. A detailed litho-structural targeting programme was undertaken by Yandan’s geophysical and sedimentary basin specialist consultants, resulting in definition of a number of fold axes within the Ulupa Siltstone regarded as having potential to host sediment hosted gold mineralisation. From the exploration data review work it was found that this formation appears to lack the prospective carbonaceous siltstones and black shales which characterise a Sukhoi Log style gold deposit. Drilling done by MESA in 1993 had sampled the siltstone bedrock under shallow cover, but no significant gold mineralisation was encountered (best assay result was 5 ppb Au). On the basis of these and other past recorded 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. Observations made of the local geology during a field trip conducted by Yandan in July 2018 were disappointing, and consequently it was decided to fully surrender the licence.