Geological mapping of an historically worked lamellar talc occurrence in the Tumby Bay area showed that snow white, finely flaky talc is present over a 2 km strike length within two beds of isoclinally folded schistose dolomitic limestone, but is of variable quality, with vein quartz, clay, jasper, mica and graphite being the main contaminants. Twelve lodes of such talc mineralisation were identified, but the majority of the mineralisation appears to be associated with Lode 1, which ranges from 30-46 m in width. Sampling of the talc and its host rock for trace element geochemistry has indicated that the original dolomite-rich sediment which was altered to talc had a high silicate mineral component. Test diamond core drilling of Lode 1 in November 2007, at two sites near the former talc mine (3 inclined PQ3/HQ3 holes for a total penetration of 185.4 m), was designed to evaluate the quality of talc mineralisation occurring at depths greater than the bottom of the old mine (19 m). Drill core recovery was generally good, although poor recovery was experienced in the talc zones. The contrast between hard jasper / chert with soft talc and clay meant that the correct selection of diamond bit was difficult, and consequently some talc/clay was washed away. Core samples taken in the talc zone are considered representative though. Hole DD07TB01 intersected a talc zone 25 m wide (~15 m true width) from 57-82 m depth, and reached a total depth of 124.8 m. Talc (clayey and light tan in colour) was intermixed with chert and quartz veins. Some core loss occurred over the mineralised interval due to variable hard/soft conditions. Visual results were not considered encouraging. Hole DD07TB02 was abandoned when it intersected an old mine stope at 9 m depth. The re-drilled hole, DD07TB03, reached a total depth of 51.6 m. This drillhole intersected a zone of clay - talc mineralisation lying between 8 and 39 m depth. Thin (<1 m) zones of talc were intermixed with clay, dolomitic limestone breccia, sandstone and chert. This hole too was abandoned due to the continual drilling difficulties. Drill core sample analytical results (obtained by XRF and ICP methods) confirmed the initial interpretation that the talc encountered in both holes was of poor quality. Accordingly, no further work on the prospect was considered necessary.