An area with poor basement outcrop located approximately 110 km north-east of Ceduna and 40 km south-west of Tarcoola, which lies wholly within the eastern part of the Yellabinna Regional Reserve, is being explored primarily for possible economic shear zone or haematitic breccia-hosted mesothermal gold +/- base metal mineralisation in likely multiphase Mesoproterozoic felsic volcanic and granitoid intrusive rocks which are juxtaposed against or are cross-cut by long-lived deep crustal faults. EL 3335 was taken up by Helix to encompass part of an E-W extension of the Yarlbrinda Shear Zone which has been offset and juxtaposed by a number of regional NE–SW trending shears. It was understood that all intended mineral exploration works to be carried out within the Yellabinna Regional Reserve required the proponent to obtain from the SA Government special environmental protection considerations and approvals. Reprocessing of available 2 km x 2 km gravity data acquired by PIRSA during April 2005 under the PACE Initiative revealed a gravity anomaly in the north-western part of the tenement that was of interest to Minotaur as a possible IOCG target. The company therefore acquired infill ground gravity coverage over this feature during July 2005, when Daishsat read 265 stations on a 500 m x 500 m grid. The new coverage resolved only a minor, broad gravity high. Correlation of this high with existing surface calcrete geochemical data failed to provide encouragement for further work on IOCG prospectivity. As a prelude to the divestment of its uranium exploration rights into subsidiary float Toro Energy, Minotaur conducted an assessment of satellite night-time thermal infrared Earth imagery for EL 3401, looking for evidence of the presence of buried Tertiary palaeochannels which could have sedimentary uranium mineralisation potential. Subsequently, Toro submitted a Declaration of Environmental Factors to PIRSA for a planned drilling programme to test such targets. During July-August 2006, part of a large CHILDARA regional airborne EM survey was flown on EL 3335 by Fugro Airborne Surveys for Toro, to try to define the buried Tertiary sedimentary palaeodrainage pattern. Two survey areas totalling 733 line km were flown using a 1 km flight line spacing and 120 m sensor height above the ground surface. The resulting processed AEM data delineated a large, branching SSW-trending Tertiary palaeochannel. No other field work ensued on the subject licence area during the following six years. Toro did conduct some office studies aimed at defining palaeochannel convergent and meander features, as a prelude to selecting possible drill targets to appraise the potential for the palaeochannel to host sedimentary uranium mineralisation at redox boundaries. In October 2013, after new exploration operator Tunkillia Gold had conducted an assessment of regional gravity and magnetic datasets, it was decided to surrender tenure.