Gateway Mining Confirms Large-Scale Gold-Silver System at Great Western

Gateway Mining (ASX: GML) has confirmed a large-scale gold-silver system from initial aircore drilling at the Great Western target within its Yandal gold project in Western Australia.

Bottom-of-hole geochemical results have defined a gold-mineralised doleritic unit over approximately 4 kilometres of strike at the Great Western flexure zone.

The company has also mapped a broader hydrothermal system that can now be traced over about 10km of strike.

Gateway will move into targeted reverse circulation (RC) drilling later this week, with a second RC rig expected to join early next quarter.

Gold Core Confirmed

The maiden aircore program confirmed gold mineralisation along a key sheared contact between differentiated dolerite and intermediate volcanics, with Gateway reporting numerous shallow bottom-of-hole intercepts, including 1 metre at 2.5 grams per tonne gold from 36m.

The company believes this result is significant because most mineralised intercepts finished at the bottom of holes due to intense silicification and limited aircore penetration.

Average hole depth along the shear structure was only 20m, meaning the first-pass drilling has tested only the upper part of the system.

Gateway also intersected significant silver in numerous holes expanding outward from the gold-rich core of the system, including high-grade results of 1m at 89g/t silver from 33m to bottom of hole, 1m at 78g/t silver from 11m, and 1m at 72g/t silver from 23m.

Only the final metre of each hole was assayed for multi-element analysis, leaving potential for silver mineralisation to extend further up-hole once re-assaying is completed.

Targeting Model Validated

Chief executive officer Richard Pugh said the first aircore results had validated the Great Western targeting model.

“The initial aircore results from Great Western have successfully confirmed a ~4km long gold-mineralised structure at the ‘flexure zone’, with the key sheared contact between the differentiated dolerite and intermediate volcanics returning gold mineralisation, as anticipated,” Mr Pugh said.

“The fact that the mineralisation intersected to date is almost all bottom-of-hole due to intense silicification tells us that the aircore drilling has only ‘scratched the surface’ of the system.”

Gateway will now shift exploration into a new phase, with an RC program to test the dolerite contact in fresh rock and drill beneath the high-grade silver anomalism to assess the interpreted primary gold target.

The company reported $15.7 million in cash and $5.6m in liquid securities at the end of the March quarter, leaving it well funded for planned 2026 exploration.