Historic drilling undertaken on the NSW side of the state border with SA, adjacent to EL 2820, has encountered quartz-gahnite, meta-iron formation and meta-amphibolite rock types that have been correlated with the highly base metal - prospective Palaeoproterozoic Broken Hill Group. A recent interpretation by Minotaur Exploration of aeromagnetic data for the South Australian side of the state border has indicated the likely existence of a poorly outcropping, unexplored inlier of interpreted similar Broken Hill Group stratigraphy within EL 2820. Results of follow-up gravity and ground TEM surveys conducted since then have highlighted the presence of two untested coincident 2 mGal gravity/TEM anomalies at the White Roo prospect, located approximately 14 km north of Cockburn and 50 km west of Broken Hill. The economic potential of these features has formed the basis of a successful bid by Minotaur for the grant of a drilling project subsidy under the PACE Initiative Year 2 programme. One pre-PACE Minotaur drilled hole, 03RCMIN01, was designed to test a bedrock conductor recognised in TEM data from the airborne survey originally studied. This drillhole reached weathered basement at 3 m depth, and passed through granite gneiss to 20 m, then into a section dominated by intermediate granitic to mafic gneiss for the remainder of the hole, which was terminated at 216 m. Minor pegmatite sweats and thin pelite to psammite interbeds are also present. The mafic sequence can be divided into two types, medium-grained biotite-quartz-feldspar-pyroxenite, and a more pelitic biotite-sericite-pyroxenite-quartz-feldspar pyroxenite. Thin garnetiferous zones flank blue quartz + sulphide (pyrite dominated) - rich zones, that correspond with low-grade zinc mineralisation. Other mineralisation is hosted in the brittle, medium-grained, pyritic quartz-feldspar to mafic gneiss. Minor brown sphalerite grains up to 2 mm in size are visible in both of these settings. No obvious explanation for the bedrock conductor was intersected in the drilling. Both moving loop and fixed loop ground TEM surveys have recently been completed at the White Roo prospect, subsequent to the drilling of 03RCMIN01. The work was undertaken by Solo Geophysics using a SIROTEM Mk111. A loop size of 200 m x 200 m was used for the moving loop survey, and a 600 m x 300 m fixed loop recording was also collected. This work showed that the existing drillhole (03RCMIN01) was drilled along strike from the bedrock conductor. The additional TEM data also highlighted the presence of a second, deeper conductor that had not been seen in the airborne TEM data. The ground TEM data was complemented by collecting ground magnetic data. In the subsequent PACE-funded drilling at the White Roo prospect during January-February 2006, 2 inclined RC drillholes were completed for 650 m penetration, one hole being put down at each of the bedrock conductor sites delineated by the ground TEM surveying. Drilling of these geophysical targets intersected pyrite/pyrrhotite/chalcopyrite mineralisation hosted within mafic gneisses. These rocks are now interpreted to be Thackaringa Group equivalents. In hole 06RCMIN03, the sulphides appear in varying amounts from 55 m depth to total depth at 350 m. Semi-massive to massive sulphides were intersected in two narrow intervals at 180 m and 220 m depth. The second PACE drillhole 06RCMIN08 also intersected basement lithologies consisting mainly of mafic gneisses, with minor amounts of felsic gneiss. Some garnet alteration was observed over the depth interval 156-161 m. Minor sulphides occur from 25 m to 121 m depth, and again from 195 m to the hole total depth at 300 m. A narrow interval of semi-massive sulphides was intersected at 80 m depth. Both PACE drillholes contain geochemically anomalous copper/cobalt intersections. The most anomalous drill cuttings sample assay value returned was 4 m @ 0.196% Cu and 130 ppm Co from the depth interval 220-224 m in hole 06RCMIN03, including 1 m @ 0.351% Cu, 145 ppm Co, 1 g/t Ag and 0.01 ppm Au below 222 m depth. Hole 06RCMIN08 intersected 4 m @ 0.105% Cu and 90 ppm Co from 76-80 m depth, 4 m @ 4250 ppm Zn from 88-92 m depth, and 4 m @ 57,300 ppm Mg from 224-228 m depth. In general, however, the assay results for lead and silver were disappointing, with no significant anomalism intersected. It appears that the observed pyrrhotite-chalcopyrite mineralisation of this area is not the product of a Broken Hill - type Pb-Zn-Ag mineralising system. To verify that the TEM conductors highlighted by the surface survey had been tested by the PACE drilling, downhole TEM surveys were conducted in both 06RCMIN03 and 06RCMIN08. These surveys successfully detected conductive strata which corresponded to the narrow intervals of semi-massive to massive sulphides encountered. At the 06RCMIN08 hole location an additional, untested off-hole EM conductor was also disclosed by the downhole TEM. Additional ground geophysical surveying and drilling is now being planned for the White Roo prospect to follow-up these results.