The Bunch gold anomaly is located on the southern end of Gil Island, approximately 2 kilometres northwest of Fish Bay.

The area is underlain by Middle Jurassic quartz diorite to diorite that contains roof pendants of Ordovician to Triassic metasedimentary rocks. Locally, pure white quartz and vitreous smoky grey quartz veins up to 0.5 metres wide and containing pyrite occur associated with the metasedimentary units.

In 1987 and 1988, United Pacific Gold Ltd. completed a program of geological mapping, prospecting and geochemical sampling. This work identified a gold silt anomaly with values up to 105 parts per billion gold. Pieces of float material found near the silt anomaly contained sulphide mineralization consisting of chalcopyrite, galena, pyrite, pyrolusite and sphalerite occurring in vitreous smoky grey quartz. A sample of this material returned up to 4240 parts per million zinc and 1.34 grams per tonne gold (Assessment Report 17987).