The Gbane Project lies within the Talensi District of the Upper East region in northeastern Ghana. Cassius’ Large Scale Prospecting Licence covers a 13.791 km2 area. The Project is at an advanced exploration stage. The Bolgatanga region is characterised by a series of highly prospective granite-greenstone belts (Bole / Nangodi Belt) located in the northeast region of Ghana, close to the border with Burkina Faso.
The belts are a northeast extension to the Palaeoproterozoic-aged Birimian basins that formed during the collision between the West African and Guyana Archaean Shields. There is significant production from a number of gold mines in the region, as well as from numerous small artisanal workings. Earlier exploration conducted in the Gbane Project area focused entirely on the Nangodi Fold Belt, specifically the current and artisanal mine workings along the eastern and western flanks of the fold belt.
Gold mineralisation is associated with shearing along the margins of the greenstone belt and contacts between the sedimentary and volcanic units as well as the margins of intrusions. The currently producing Shaanxi gold mine is located to the west of the Gbane Project and is located at the sheared margin of the Nangodi Belt. Numerous artisanal workings also occur along strike of this contact within sheared quartz vein material adjacent to the Shaanxi mine.
Gold mineralisation is also present in artisanal workings sunk within strongly sheared phyllites along the margins of the Pelungu intrusion. The artisanal workings follow a zone of shearing over hundreds of metres in a north-northeast direction. These shear zones are between 3 and 6 m wide and hydrothermal alteration of silica-chlorite-sericite-epidote is typically associated with these sheared contacts and along the intrusive margins.
Independent drilling contractor, Geodrill Ghana Ltd, were appointed to undertake the reverse circulation (RC) and Diamond Core(DD) drilling programme which commenced in May 2017. To date Cassius has drilled a total of 8,637 metres RC (58 holes) and 6,286 metres DD core (32 holes) through Phases 1 and 2 of the initial exploration programme.
Initial drilling was based on previous geochemical, geological mapping studies and the presence of artisanal workings a total of 58 RC exploration holes have been drilled to an average 150 m in length (maximum 230m) targeting potential shallow alteration zones and gold grade in the west of the Project area.
The integration of all the exploration and drilling data has identified a deeper and wider zone of mineralisation associated with a strongly altered shear zone (not identified in the earlier stages of drilling).
The significant highlight of the maiden exploration program is the identification of 1.5km of strike within a 5m – 30m wide mineralised and altered shear zone extending at least 500m down dip at approximately 35˚ to the west in the western portion of the Gbane Project area. To date this shear zone has been consistently intersected close to predicted depths in all 10 of the recent diamond core holes.