Logging of RAB holes has shown graphitic schist horizons over at least 3km strike with widths up to 100m.
Castle managing director Mike Ivey said: "This is a greenfields discovery made as a consequence of our gold exploration and given the current strong interest in graphite suggests that this prospect may hold significant value for Castle."
The RAB drilling covered 1,262 holes for 29,861m during the 2013-14 dry season. This work targeted areas considered prospective for gold and base metal mineralisation, particularly around the Bundi and Kpali gold prospects.
Assessment identified significant graphitic schist intercepts within the oxide profile.
The drill samples have been submitted for gold analysis and selected intervals will be submitted for carbon analysis after the receipt of the pulps, which are currently being recovered from the laboratory in Ghana.
Castle Minerals said: "The RAB drilling has only tested the oxide component of the graphitic zones and most intercepts remain open at depth and along strike."
