IronRidge Resources has successfully used trenching to define wide and long pegmatite intersections at the Ewoyaa West target – just one of the multiple pegmatite targets within the Cape Coast lithium portfolio located in Ghana, West Africa.
Ghana – Over 940 m of new trenching and 1 640 pits have been dug over the Ewoyaa project area; both ongoing as an effective exploration tool.
Ongoing pitting and trenching activities within the Ewoyaa project area has defined over 840 m strike of continuous weathered pegmatite up to 100 m wide at surface at the Ewoyaa West target, which dips shallowly towards the east.
A total of 525 m in four trenches was completed at the Ewoyaa West target, while additional pegmatite has been intersected in pitting to the south, providing potential for a further total of 1.25 km strike at the Ewoyaa West target.
A fifth trench was extended 190 m east to test pitting intersections in-between Ewoyaa and Ewoyaa West.
The fifth trench intersected 65 m of continuous weathered pegmatite which remains open to the north and south in what is now called the Ewoyaa Middlings target.
Both new targets coincide with a low-lying ridge, with no pegmatite visible at surface. This is significant as it increases the potential for additional ‘blind’ pegmatite discoveries that have not yet been tested by pitting. Additional sub-parallel ridges are evident within the topography in the immediate project area which will be tested by ongoing pitting programmes.
The newly identified pegmatite zones are significant as they enlarge the surface area by 50% within the immediate Ewoyaa project area; allowing for potential resource increases and within easy trucking distance for potential future mine development.
Not only does pitting and trenching provide valuable geological observations of the pegmatites which are otherwise not seen at surface nor in auger drilling programmes, but it also provides youth employment within the local communities rather than utilising machinery.
“Pegmatites often occur in clusters and pitting and trenching are proving to be a successful tool for defining additional pegmatites within the immediate Ewoyaa project area through weathered cover where no outcropping pegmatite is visible,” says IronRidge Resources COO Len Kolff.
“We have effectively increased the known outcropping pegmatite surface area by approximately 50% with the addition of the Ewoyaa West target and with trenching ongoing at the Ewoyaa Middlings target there is potential for further increases.
“We have planned a phased reverse circulation (RC) drill programme to test the new targets as well as extensions at the Ewoyaa deposit, with drill access and pad planning underway.
“Given the project’s significant mineralised intersections, positive metallurgical results, proximity to infrastructure and favourable jurisdiction, we are pleased to have awarded long lead environmental and social baseline studies for future mine permitting to Ghanaian consultants NEMAS which have now commenced,” says Kolff.
IronRidge Reosurce CEO Vincent Mascolo says the discovery of Ewoyaa West and Ewoyaa Middlings targets is extremely encouraging.
“The decision to advance the Ewoyaa project area ahead of a maiden resource estimate was predicated by the ongoing success with the discovery of new pegmatites in the immediate project area, exceptional metallurgical test work results and a robust treasury,” he says.
A phased RC and diamond core drilling (DD) drill programme has been designed to test the Ewoyaa West target, Middlings target and strike extensions over the known Ewoyaa and Abonko deposits.
Final meterage will be commensurate with initial confirmation of spodumene or other lithium mineral phases below base of weathering at Ewoyaa West and Middlings targets to justify the second phase.
Additional DD drilling has been planned over the Ewoyaa West target and Abonko for future metallurgical test-work and geological control.
Drilling is planned to commence during Q3 2019 after the current wet season, weather permitting. Drill access and pad planning is underway and a total 13 200 m of RC and DD drilling has been planned.