Gateway Mining has identified a significant gold system at its Great Western intrusive target near Wiluna in Western Australia. Surface geochemical sampling has revealed an 11.5-kilometre-long gold-in-soil anomaly along the Great Western shear corridor, with a peak result of 500 parts per billion gold.
The anomaly correlates with an induced polarisation resistivity anomaly, indicating intrusive-related alteration within the shear zone. This setting, involving a sanukitoid contact, is considered classic for substantial mineralisation in the Eastern Goldfields of the Yilgarn Craton.
The gold anomaly is flanked by a molybdenum-bismuth-tellurium-copper anomaly to the east, which aligns with the surface expression of the Great Western intrusive body. The target area lies about 4.5 kilometres northwest of Gateway's Horse Well gold camp, a previously successful exploration area.
Gateway has identified four key target types, including a dilational zone where the Great Western Shear departs from the intrusive body, the main mafic-intermediate contact with 11.5 kilometres of gold anomalism, and northwest-trending shear zones interpreted as splay structures off the Celia Shear.
The company expects gold mineralisation at Great Western to be at or near surface due to thin transported cover. Gateway plans further drill programs to test the potential for multiple large gold discoveries.
