Uranium One Australia (U1A) acquired the Stuart Shelf Project tenements in 2005 with the aim of exploring for uranium mineralisation that has unconformity - related genetic features broadly analogous to those of deposits of the Athabasca Basin in Canada. The five licence areas were selected to cover the shallower parts of the Late Mesoproterozoic Cariewerloo Basin, wherein it was thought that economic occurrences of uranium mineralisation might have formed at accessible depths. The company's exploration model of mineral genesis involved the possible remobilisation of primary uranium from Palaeoproterozoic basement rocks during the period of emplacement of the Neoproterozoic Gairdner Dyke Swarm, and re-deposition of this uranium from dispersing oxidised hydrothermal fluids in overlying basinal trap settings where chemically reactive reductant lithologies (such as the basal Neoproterozoic Tapley Hill Formation) were encountered. To U1A's knowledge, over this region there had previously been no exploratory drilling that penetrated to deeper than 300 m. All of the deepest drillholes had been terminated within the late Mesoproterozoic Pandurra Formation, and there is no known mineralisation located within those holes or anywhere near them. Importantly, U1A's primary target for enabling its metallogenic model, the Gairdner Dyke Swarm, intrudes the Pandurra in all the licence areas. Initial field work performed on the project ground entailed the acquisition during March-April 2007 and August 2007 of two helicopter-assisted regional infill gravity surveys, conducted over the following tenements: • EL 3397 (northern group of sub-blocks) where 375 stations were read with a station density of 800 m x 800 m; • EL 3397 (southern group of sub-blocks) where 1667 stations were read with a station density of 400 m x 400 m; and • ELs 3415, 3398, 3399 and 3400, handled as one survey comprising grid spacings from 2 km x 2 km to 1 km x 1 km, with a total of 2436 stations read. Next, during May-June 2008, U1A completed a stratigraphic/exploratory RC precollar and NQ diamond core drilling programme to search for evidence of hydrothermal alteration and related uranium mineralisation that might be associated with the Gairdner Dyke Swarm, and to provide rock unit petrophysical data with which to refine its future target generation process addressing the Cariewerloo Basin. Variously, three steeply inclined drillholes (CHR001-003) were completed on EL 3399 for a total penetration of 1582.6 m, three moderately inclined drillholes (KBF001-003) were completed on EL 3415 for 963 m, and one moderately inclined drillhole (BHL001) was completed on EL 3400 to TD 633.3 m. Following geological logging of the drill cuttings and cores, and chip sampling of selected drill core intervals, downhole wireline geophysical logging of each drillhole was carried out, utilising a gamma tool (to pick up anomalous radioactivity), plus a resistivity tool and a dual induction tool (for lithological characterisation). Unfortunately, no evidence of hydrothermal alteration was encountered during the drilling, and subsequent assaying of drill core samples failed to return anomalous trace element values. Therefore the prospectivity of the Stuart Shelf Project tenements for uranium mineralisation of the type envisaged was downgraded. [After examination, all seven of the recovered drill cores were deemed by U1A management to have no future value or utility for physically providing representative geological samples, and therefore the cores were subsequently disposed of appropriately. They were not offered to PIRSA]. No field work ensued on the project ground after this time, apart from a brief ground magnetic survey performed during March 2011 [no raw magnetic data was submitted to PIRSA] to profile inferred hydrothermal alteration zones in Pandurra metasediments near Gairdner Dolerite dykes, in three separate areas on ELs 4599 and 4600. No magnetic responses were obtained on the 56 lines surveyed that could be seen by U1A as coming from compelling drill targets. Because of the need to shift its focus elsewhere, onto the Honeymine mine and Goulds Dam exploration project, and owing to having no success in finding a joint venture partner to help continue exploration on the Stuart Shelf Project, U1A decided to surrender the project licences.