The company has already defined a mineral resource estimate of 14.5mln tonnes at 1.31% lithium oxide (Li2O) in the inferred and indicated category at Ewoyaa, including 4.5mln tonnes at 1.39% Li2O in the indicated category.
The company said its final resource expansion drill programme at Ewoyaa returned the highest metal content intersection (lithium grade multiplied by meters) to date of 53 metres (m) at 1.34% Li2O from 80m in hole GRC0392.
Additional high-grade lithium pegmatite intersections were reported in reverse circulation (RC) drilling results at the Ewoyaa North and the Grasscutter targets adjacent to Ewoyaa, it said.
All assay results have now been reported for the 25,612m resource expansion drilling programme and the programme has been completed with infill resource drilling and metallurgical diamond core drilling now underway.
"We have returned our best drill intersection to date with the highest metal content observed for the resource expansion programme at the Ewoyaa North target,” commented Vincent Mascolo, chief executive officer of IronRidge.
"The board remains confident the additional exploration targets will increase resource scale and improve project economics, where we have defined Ghana's first lithium JORC compliant resource of 14.5mln tonnes at 1.31% Li2O, within 110km of an operating deep-sea port.
"Infill resource, metallurgical and hydro monitoring drilling is well underway in addition to metallurgical test-work in support of planned Feasibilty Studies.
"The company is ideally positioned to take advantage of the increasing demand for lithium due to its role in the stored energy transition and looks forward to keeping shareholders up to date as the Ewoyaa project progresses."