The reverse circulation grade control results confirmed the continuity of significant high-grade granite-hosted gold mineralisation.
They are believed to reconcile well with the resource model and have de-risked the deposit ahead of its future commercialisation.
Highlight assays were: 7m at 35.32 grams per tonne gold from 33m; 5m at 15.23g/t gold from 3m; 5m at 14.29g/t gold from 41m; 6m at 11.85g/t gold from surface; 6m at 10.46g/t gold from 17m; 5m at 11.49g/t gold from 27m; 2m at 22.69g/t gold from 35m; 7m at 6.46g/t gold from 48m; and 8m at 3.47g/t gold from 39m.
The Grace deposit presents a potential opportunity for early open pit mining followed by eventual establishment of a portal at the base of the pit and underground development.
Close to surface
Rox managing director Alex Passmore said drilling had delineated high-grade, free milling mineralisation close to surface adjacent to the historic mining operations.
“As part of planning for the Youanmi project, we are looking at early development and cash flow-generating opportunities including at the Grace area, where mineralisation starts from surface,” he said.
“These results support earlier resource work and indicate a strong likelihood of economic mineralisation in this area.”
Granite-hosted gold mineralisation occurs at several sites within Youanmi, most notably at the Grace and Plant Zone prospects.
Grace was discovered by Rox in 2019 and is hosted in north-northwest trending conjugate structures, which splay off the northwest-trending Mine Shear.
The mineralised structure consists of a moderately west-dipping shear zone and silica-gold breccia-style veins within sericitised granite occurring in the granite footwall of the Youanmi main lode.
High-grade mineralisation appears within these lodes as north plunging shoots.
Metallurgical testing of oxide and fresh reverse circulation samples from the Grace deposit confirmed recoveries of up to 99.8% through conventional processing methods.