Inco Resources ('Inco') has been exploring the outcropping portion of the Ordovician Black Hill Intrusive Complex for possible Voisey's Bay style nickel, copper and platinum group element (PGE) mineralisation. This work commenced on 30/9/2004, when it signed a joint venture agreement over the subject EL 3122 with grant licensee Landmark Stone Pty Ltd. The agreement was later approved by the SA Minister of Mines on 6/12/2004. Inco became the manager and operator of the tenement, with the entitlement to earn 100% of the mineral interests by meeting the government expenditure commitment on the tenement, whilst Landmark continued to explore for dimension stone. Previous drilling undertaken by North Broken Hill Ltd during the mid 1970s, of the early formed mafic-ultramafic layers of the intrusive complex, had identified evidence of the precipitation of magmatic nickel-copper sulphides; the best intersection found then was 30 m @ 0.2% Cu, including 2 m @ 0.55% Cu, 0.14% Ni and 0.4 g/t Pt+Pd (cf. Env 2631). Black Hill is situated approximately 20 km east of the eastern uplift front of the Mount Lofty Ranges, and is surrounded by Tertiary marine sediments of the Murray Basin. Outcrops at Black Hill are coarse grained poorly layered gabbro rocks. Alkaline hydrothermal fluids have metasomatically overprinted the mafic rocks in places, resulting in the development of orthoclase, biotite and zeolites. This alteration is related to post-emplacement uplift and tilting of the intrusive igneous bodies. A subtle compositional layering dips 70-80 degrees southwards, highlighting the late tilting. Within the rocks, PGE anomalous intervals also show crude banding. Initial field work funded by Inco started in December 2003 with 6 RAB/aircore/RC holes drilled at two locations on EL 3122; four holes were drilled at Black Hill and two just east of Cambrai. The holes ranged in depth from 33 m to 63.5 m, the total penetration being 311.5 m. No significant mineralisation or sample assay values were recorded. During November 2004, Inco acquired an airborne EM (25 Hz GeoTEM Deep) survey over the entire licence area, flying 985.7 line km along east-west traverse lines spaced 250 m apart, using a mean sensor elevation above the ground surface of 75 m. Due to thick conductive cover mantling much of the surveyed area, the method was believed to have only been effective over the NE one-third of it, where 60 small EM anomalies were able to be discerned. No high ranking bedrock responses were detected. During February to April 2005, 200 m x 200 m moving loop ground TEM surveys (35.5 line km, 332 stations in total, read at 100 m spacing) were carried out over some of the airborne TEM responses, and were also used to investigate potential Cu-Ni-PGE targets identified from aeromagnetic data and from previous drillhole information. No responses of interest were obtained. During licence Year 3, both semi-regional and detailed ground gravity survey traverses were conducted to map buried mafic intrusive rocks, magnetotelluric surveying was carried out along four lines, moving loop and fixed loop ground TEM surveys were read in two areas, and 4 holes were drilled to explore previously untested edges of mafic intrusive bodies. Over the period August to October 2005, 385 semi-regional gravity stations were read for Inco on EL 3122 along public roads and tracks, as part of a wider survey coverage totalling 2610 stations. Station spacing was generally 500 m, but a few lines near Cambrai and Morgan used 200 m station spacing. All of the proposed gravity stations could not be read due to encountering access difficulties, i.e. locked gates, standing crops, and lack of some landowner's entry permission. Later on, after the conduct of subsequent MT surveys and Inco's re-evaluation of available magnetic and drilling data, additional detailed gravity surveying was performed during March-April 2006 over areas of specific interest, to provide context and guidance for target defining TEM surveys and follow-up exploratory diamond drilling. 986 stations were read on EL 3122 for this phase of work, generally at a station spacing of 100 m. Out of this, two drillholes were programmed to test the previously undrilled, potentially mafic intrusive source of a coincident gravity and magnetic response located immediately NE of Cambrai township. Another two holes were planned to test residual gravity anomalies detected over the margin of the Black Hill main intrusion in the Landmark SW area. After the completion of the semi-regional gravity survey in October 2005, 109 frequency domain tensor sounding MT measurements were made at 500 m station intervals along Lines 12 and 16 in December 2005. Infill readings there to intervals of 250 m, plus readings along Lines 25 and 26, were completed in February 2006, for a total coverage of 32.8 line km. No significant bedrock conductors were identified except over the outcropping SE flank of Black Hill. 125 stations for 5.2 line km of fixed loop TEM surveying, and 97 stations for 9.5 line km of moving loop TEM surveying, were recorded over three areas surrounding Cambrai township during October 2005, but no anomalous bedrock conductors were detected. During May and June 2006, 4 inclined rotary mud/ diamond cored holes were completed on EL 3122, comprised of two holes at each of the Landmark SW and Cambrai North prospects, for a total of 344.2 m of rotary mud pre-collar drilling through the Murray Basin sediment sequence, and 489.8 m of NQ2 diamond core drilling. All of the holes were drilled for some distance into weathered and fresh intruded Black Hills Gabbroic Complex mafic lithologies, but without finding any encouraging evidence of nickel sulphide mineralisation. Due to its disappointing exploration results, Inco left the Black Hill joint venture early in 1987, having spent enough to leave EL 3122 in good standing. Licensee Destiny Stone began a search for a new JV partner to continue the mineral exploration work, but had no luck in that regard. The annual reports for licence Years 4 and 5 only mention the licensee's managerial activity in securing its legal rights to undeveloped dimension stone resources identified in the Black Hill area, through the pegging of new mineral claims. An application for an extractive minerals lease was lodged with PIRSA over the company's existing ML 6144 at the Southern Cross Black Granite Quarry, to permit the small scale quarrying and sale of dimension stone.