The prospectivity of the Meleya Zone has recently been confirmed and further enhanced by a number of geochemical ‘fingerprinting’ techniques. In addition to the previously announced surface sampling, a number of samples of relatively unweathered volcanic rocks were analysed using full digestion, fused bead LA-ICPMS and XRF methods. Results were then compared with analogous publically available data from Golden Grove.
One method which can be used to determine the prospectivity of a volcanogenic massive sulphide system is by assessing its fertility (4-5). Samples from the Meleya Zone plot within or around the ‘F-II / F-IIIa / F-IV’ fields which is a key requirement for enabling economically viable archaean VMS deposits in Australia and worldwide (including Golden Grove).
The host rocks in the Meleya Zone are interpreted to be along strike from Golden Grove. The similarity between the two areas has now been tested with the aid of another geochemical tool (chondrite normalised immobile element trace plot). This data indicates that samples from Meleya are dacitic/rhyodacitic in composition, confirming analogous geology.