Exploration of an area in the eastern Musgrave Ranges located 80 km north of Marla and 65 km south of the SA/NT state border, and which straddles the Stuart Highway, has sought to find possible Giles Complex - hosted magmatic nickel sulphide and platinum group metals, primary mesothermal/hydrothermal gold, and stratiform Broken Hill - type base metals in the predominantly sand-covered, shallowly buried Proterozoic bedrock. Initial work comprised a geophysical consultant's review and interpretation of existing magnetic and radiometric data, and partial leach orientation sampling followed by regional plus infill soil and magnetic lag geochemical sampling (267 samples taken on nominal 2 km x 500 m centres, infilled with 113 samples over four areas seen to be anomalous in nickel, cobalt, copper and PGE). Resulting coherent low order surface anomalies, as well as certain selected areas of similar elevated Co-Cu-Ni that had been previously identified by work done in the 1970s-1980s, were then profiled with ground magnetic and electromagnetic traverses. In October 2003 and May 2004 a total of 95 line km of ground TEM was acquired over three of the newly defined soil anomalies, using a 100 m moving transmitter loop on lines spaced at 400 m. The area surveyed in the north-east of the licence showed a bedrock conductor with a strike length of about 800 m, associated with late-time channel IP effects. On the aeromagnetic image this coincides with a reversely magnetised magnetic peak suggestive of possible shallowly buried Giles Complex mafic/ultramafic rocks, the magnetic feature having an irregular shape which might represent target feeder-type intrusive dykes. The area surveyed in the north-west of the licence showed a series of interpreted strong bedrock conductors lying sub-parallel to the survey line orientation, which lie 2 km away from a large magnetic low approximately 7.5 km in diameter that is thought to be a large Giles Complex intrusive body. Next to be completed were 62 vertical aircore drillholes totalling 1162 m, also during the 2003-2004 licence year, to test coincident geochemical and geophysical anomalies at these two prospects. At Kangaroo Well 32 holes were drilled at 50 m spacing along three traverses, and at Mundy Dam 29 holes were put in likewise. The drilling encountered a package of weakly kaolinised gneissic rocks in all holes. The predominant rock type was quartz-feldspar-biotite gneiss, with minor gradations between more feldspathic and more mafic (amphibole-chlorite) zones. Minor bands of alteration to 20 m thick comprised K-feldspar and epidote, a feature which is common in the region. Downhole geochemical sampling was completed on a 4 m composite spear basis, with 314 samples collected and analysed for Ni, Cu, Pt, Pd, Au, Zn and As. No significant results were returned. During late 2004 another 35 line km of ground TEM surveying, initially comprising 400 m-spaced lines of 100 m moving in-loop coverage, were completed over the previously reported geochemical anomalies. This survey was later infilled using 100 m-spaced lines and 50 m moving in-loop geometry, to better define drill targets. A ground magnetics programme was also completed using 100 m-spaced E-W lines over an EM target. The results defined a 250 m wide NE-trending positive magnetic anomaly having an amplitude in the order of 500 nT. During 2005-2006 a 400 m × 200 m grid surface geochemical sampling programme comprising a total of 224 -2 mm and -75 um size fraction samples was undertaken to test an historically reported copper anomaly. Peak values returned comprised 4 ppb Au, 33 ppm Ni, 20 ppm Co, 125 ppm Cr, 178 ppm Cu, 69 ppm Zn and 10 ppm As. By 2007 the joint venturers had concluded that all of their better geochemical anomalies as then known had been investigated and downgraded, so no new field work ensued. An attempt to involve BHP Billiton in furthering the licence evaluation proved unsuccessful. For future exploration at De Rose Hill it is proposed to target base metals in more deeply covered areas where surface geochemistry techniques would be ineffective: favoured sites would be any geophysically anomalous zones proximal to regional scale faults, where Giles Complex intrusions could exist.