An area centred over the south-central Coober Pedy Ridge tectonic feature, 55 km south-southeast of Coober Pedy township, is being explored for possible economic buried massive haematite and magnetite within either Proterozoic banded iron formation (BIF) type or gneissic type iron ore deposits. It is thought that potential exists as well as for discovering volcanic - hosted Prominent Hill type IOCG sulphide mineralisation and, perhaps too, sub-bituminous coal seams in the younger Arckaringa Basin sediments. Historic exploration in the Windy Valley area has been limited; in 1987 CRAE drilled four shallow RC holes as part of a regional program testing magnetic anomalies for kimberlites. Archaean-Early Proterozoic gneissic granite outcrops through thin Mesozoic and Tertiary Cainozoic cover at Fitzgerald Dam, situated just to the north of EL 4423. This is the only known exposure of basement rocks in the immediate vicinity. There is a chance that the concealed Early Permian Penrhyn coal measures lately identified by drilling done on EL 3336/4525 Robin Rise may extend onto the western part of EL 4423. During the initial year of tenure, licence operator WPG Resources carried out a desktop review of previous exploration and compiled drillhole and geophysical survey information into a GIS database. At this stage, no targets for further work were obvious. A programme of geophysical data modelling on selected aeromagnetic and gravity traverses was planned in order to outline areas of shallow bedrock, as a prelude to doing conventional RAB or aircore bedrock geochemical sampling. During licence Year 2 (2011-2012), following OneSteel's purchase of Southern Iron from WPG Resources, that company did its own review of available information, and identified the potential presence of a number of geophysical targets in the regional-scale magnetic and gravity datasets, which it decided needed more detailed geophysical coverage in order to assess confidently. During the 2012-2013 reporting year, OneSteel (now trading as Arrium Mining) acquired part of a multi-licence airborne magnetic and radiometric survey during the period January-March 2013, and commenced geophysical data interpretation. Detailed coverage of 5595.8 line km was flown over Windy Valley at 100 m north-south x 1000 m east-west grid line spacing, using a 30 m nominal sensor height above the ground surface. The resultant data were sent to Southern Geoscience Consultants to process and enhance for visualisation purposes. The design of the proposed first-pass reconnaissance aircore drilling campaign would be reviewed following receipt of the processed geophysical imagery. During the 2013-2014 reporting year, no field work was done. Southern Iron undertook a re-interpretation of existing older gravity data, combined with an interpretation of the 2013 airborne geophysical survey data. Aerial photographic coverage of the tenement was purchased to ortho-rectify for GIS use. During the 2014-2015 reporting year, a ground gravity survey was acquired in July 2014, when a total of 886 stations were read on two separate grids to profile three targets. The grid located in the north-east of the licence area had a regular 200 m x 200 m station spacing covering an area of 14.3 square km, which was bisected by the Stuart Highway; the other grid, located 15 km to the west of the first, had 100 m x 400 m station spacings covering an area of 21.7 square km. The resultant data were sent to Southern Geoscience Consultants to process and interpret. In October 2014, Southern Iron applied to DSD for a subsequent renewal of the subject EL 4423. DSD granted renewal of the tenement as EL 5567 for a period of two years from 25/1/2015 [Note: the annual reports for this licence, which is being jointly reported with Southern Iron's EL 5566, are held separately in Env 12879].