A small area located immediately west and north-west of Vivonne Bay on Kangaroo Island has been explored for possible economic occurrences of the lithium, tantalum and rare earth element (REE) - bearing accessory minerals lepidolite, zinnwaldite and spodumene, currently in short supply worldwide but of great value to modern industrial electronic applications. The target of exploration in this area was known Cambrian to Ordovician pegmatites exposed on the banks of the Harriet River and its tributaries, which were emplaced during the Delamerian Orogeny. The host rocks for these are metamorphosed marine sandstones, phyllites and schists of the Kanmantoo Group. The area is largely covered by loosely consolidated Tertiary sands and clays. Initial landholder consultation and property access negotiations on Kangaroo Island were conducted by Lithium Australia for the Vivonne Bay area from 16-19/1/2018, to allow for the commencement of field mapping and geochemical sampling. First pass exploration was conducted between 18-25/2/2018, with only one out of 30 rock chip grab samples, KIV029 taken at the western end of a well-zoned, quartz-cored pegmatite dyke ~200 m long and 35-50 m wide, returning an anomalous lithium assay of 550 ppm Li. A PEPR was applied for to allow for digging 3 costeans across this dyke, and the work was performed during the period 28/2/2019 to 5/3/2019. Channel rock chip sampling undertaken in costean 3 that was dug at the western end of the dyke beneath the aforesaid surface lithium anomaly returned the only notable but adjudged poor result out of the 67 subcrop samples assayed, when only one three-metre composite sample, KIV049, returned an elevated lithium assay value of 120 ppm Li which is associated with a narrow, 50 cm wide beryl crystal rich zone. A conclusion was reached that the pegmatite dykes outcropping within the Vivonne Bay area are generally narrow and have low lithium contents, so it was decided to allow tenure there to lapse.