Attention was drawn to the rather narrow copper workings of the Calcookara mine because the copper ore remnants found on dumps and in an ore paddock gave a Geiger Muller instrument gamma count of about 250 above the normal background of 60. Further attention was paid to the mine because of reports of a wider, possibly well - leached lode, met with in the deepest shaft situated at the south-western end of the line of workings. A recent field inspection of the mine shows that the historic workings, the majority of which are now inaccessible underground, are all shallow and lie well up in the oxidised zone, and are strung out along a NE-SW strike over a distance of 500 feet. Records of exploratory drilling done around the mine in 1916 suggest that the host rocks are strongly folded metasediments that have been intruded by a pegmatite sill. The copper mineralisation occurs in a crushed schist situated between hanging wall pegmatite and footwall recrystallised limestone, but the weakly radioactive, nodular copper carbonates occupy only 6 to 18 inches width at the north-eastern end of this 3-4 foot wide zone. Their development is patchy and appears to be confined to above the water table, over about a 50 foot length of the narrowest part of the lode; to the south-west, where the lode widens to 2 feet or more, it takes the form of a ferruginous, jaspery gossan which is neither radioactive nor cupriferous. It has been concluded that this particular worked copper occurrence is of a restricted, supergene nature, but with the proviso remaining that other, small buried lenses of similar type may occur in the general vicinity of the pegmatite. A single diamond drillhole, depressed at 80 degrees to the north-west, has been recommended for drilling to test the better developed south-western part of the lode for any concealed primary mineralisation existing below the water table there. A separate preliminary assessment was made of the prospectivity of a lensoidal, 100 feet x 200 feet body of coarsely crystalline ? lime feldspar that is present within a gneiss unit, and lies stratigraphically 150 feet above the Calcookara copper lode. The feldspar appeared to be fairly pure, and it was sampled for determining its mineralogy and lithium content. The mineral sample examined petrographically proved to be a massive pyroxene (diopside) of no economic interest.