The trading halt will be in place until Monday, July 1, or when an announcement is released to market, whichever occurs earliest.
Shares were up 15% today to 11.5 cents before the halt was granted.
In May, the company sourced additional drill rigs to fast track a 15,000-metre drilling program at the Mt Freda Complex near Cloncurry, Queensland.
The program is targeting high-grade gold, copper, cobalt and massive sulphides indicative of iron-oxide-copper-gold style (IOCG) mineralisation.
Ausmex has assigned five drill rigs to several prospects including large IOCG targets.
The company aims to define JORC-compliant resources over the Mt Freda Complex, Evening Star and Golden Mile deposits, including historical high-grade prospects with more than 8 kilometres of outcropping mineralisation.
Ausmex also recently appointed Kieren Whittock as exploration manager, tasked with the role of supervising and managing the extensive drilling program.