An aeromagnetic/radiometric survey and an aircore drilling program (41 holes, total 247 metres) were carried out near the SA/NT border to the north, north-east and west of De Rose Hill, to test three positive aeromagnetic features which potentially could have been generated by Recent sediment-masked layered intrusives of the Giles Complex. Follow-up ground magnetics and drilling to basement attributed the three initial Ni-target anomalies to effects from magnetite-rich granitoids. A single radiometric anomaly was traced to an arkose outcrop. Subsequent RC/diamond drill testing (1 hole, total 28 metres) of an unusual negative magnetic feature near Mount Cavanagh, with possible Ernest Henry-type anomaly characteristics, intersected part of an olivine-rich cumulate lacking significant Ni-PGE geochemistry, and later EM traverses run over the same area did not define any bedrock conductors. Other electrical anomalies identified from airborne EM trials were attributed to increases in the conductivity or depth of overburden. Attendant rock and soil geochemistry sampling values were not significantly anomalous.