A review of past SADM and company technical reports concerning surficial gypsum deposits delineated near Sceale Bay showed that the gypsum resource is substantial, with a historical total proven resource of 50 Mt of gypsum at an average grade of 87.15% purity, and total probable resource of 58 Mt of gypsum at an average grade of 86.85% purity (Olliver et al, 1985). The largest deposit, at Lake Purdilla, covers a probable area of 32.3 square km, with an average thickness of 2.2 m. A newly prepared resource estimate of the gypsum occurring solely within Lake Purdilla yielded an Inferred Resource of 56.3 Mt @ 90.3% purity, based on a block model prepared from digitised data obtained from 121 past explorers' drillholes. During 2010, a letter of understanding was formalised between Minotaur and another company specialising in the development of gypsum deposits, who will undertake an informal prefeasibility study concerning the potential development and marketing of gypsum from the Lake Purdilla deposit. During 2011, no field work took place on the subject licence, but Minotaur commenced its own scoping study into the possible economic viability of the Lake Purdilla gypsum deposit. Other assessment work also started, to define what exploration activities are needed to provide data that will allow computation of an Indicated Resource for Lake Purdilla. During licence Year 4, Minotaur's completion of a detailed assessment of all historical drilling information and geochemical data for the Lake Purdilla gypsum deposit permitted estimation of an Exploration Target (conceptual, non-JORC compliant resource) of 50–60 Mt @ 85–90% gypsum. The average gypsum bed thickness is 2.8 m, and maximum modelled bed thickness is 4.7 m. The modelled volume and grade estimates used a minimum 1 m thickness cut-off and an assumed in situ dry bulk density of 2.3 t/cubic m. Two selected high grade gypsarenite samples were mineralogically analysed. Market research into gypsum and potential export markets in Asia was commenced. During licence Year 5, Minotaur continued to try to obtain and digitally capture a considerable amount of missing historical 1988, 1996 and 1997 drilling data which it had become aware of and which was not held by the SA Government, and also worked on conceptual logistical solutions for the transport and export of bulk gypsum at ~500,000 tonnes per year to Asian markets, either through Thevenard or from a new trans-shipment facility at High Cliff. In late May 2013, a brief field visit to Lake Purdilla was undertaken in conjunction with a potential joint venture partner who collected 4 samples for analysis. One gypsite sample was collected from a lunette and three gypsarenite-rich samples from just below the lake surface. The results and outcome were awaited. During licence Year 6, Minotaur purchased the additional drilling data for Lake Purdilla that were not yet held by DMITRE, in the form of three reports written by consultant Jeff Olliver. They describe separate campaigns of appraisal drilling: - a 1988 campaign of 359 drillholes along 54 traverses for a total penetration of 571.4 m, generating 648 downhole samples of which 100 were sent for analysis; - a 1996 campaign of 51 holes along 23 traverses for a total penetration of 149.2 m, from which 136 samples were analysed; and - a 1997 campaign of 131 holes (machine and hand auger) put into shoreline dunes and the lakebed in north-eastern and south-eastern portions of Lake Purdilla. Minotaur began to study these data with a view to using them to create a JORC compliant resource. Discussions with potential gypsum consumers were ongoing. Following a request from one party for provision of a bulk (>4 t) gypsum sample, a PEPR to undertake costeaning on the northern part of Lake Purdilla was submitted to DSD in November 2014. Negotiations with affected stakeholders were completed. During licence Year 7, a number of activities were performed by Minotaur: - on 1-2/12/2014, a 4 t bulk sample was dug from a costean on Lake Purdilla and transported to Germany to enable Knauf to do proprietary tests for separating gypsum and salt without washing; - in February 2015, 6 shallow vertical auger holes for 9.6 m were drilled on part of Lake Larson to sample gypsiferous sediments for assaying; - a detailed DGPS elevation survey was performed along 58 line km of historic drill traverses crossing the dunes surrounding Lakes Purdilla and Toorna, to obtain accurate RL data from 1328 stations; - a detailed DGPS elevation survey was performed along the 650 m long main axis of Lake Larson (7 stations); - the sedimentary geology of the Lake Larson salina was described and compared to that of adjoining Lake Purdilla - there are marked dissimilarities evident. The Lake Larson gypsarenite is associated with a greater proportion of calcareous clay, contains greater quantities of variably distributed clastic materials, and is less consolidated, featuring minimal recrystallisation of selenite; - the results of a consultant's study into the logistics of directly shipping bulk gypsum from the proposed export site were received, and they indicated that the project would be viable if the infrastructure was used at rates in excess of 1 Mt/a; and - a review of the global in situ gypsum resource on EL 5398 was undertaken during May 2015, incorporating Jeff Olliver's past resource estimates for the occurrences at Lake Purdilla and Lake Tooma. At this stage, Minotaur did not regard its 2015 resource estimation as sufficiently validated to allow public reporting at JORC 2012 standard. It was found that the in-house resource block modelling and estimation done previously by Minotaur had confirmed the tonnes and grade of evaporitic gypsum estimated by Olliver (1997) for Lakes Purdilla and Toorna. However, the Lake Toorna dune system and the broad dune set to the west of Lake Purdilla were noted as not having historically been included in dune resource calculations. The in-house dune resource calculation that had been completed by Minotaur indicated that inclusion of these volumes would add at least 1 Mt of high grade aeolian-reworked gypsum to the resources estimated by Olliver (1997).