Upper Hunter Antimony-Gold

The Upper Hunter Antimony-Gold Project, located within the New England Orogen of northern New South Wales, is a strategic addition to Trigg Minerals’ critical minerals portfolio.

The project area is known for its structurally controlled, quartz-vein-hosted gold deposits and associated antimony mineralisation covering a significant portion of the historic Upper Hunter Goldfield. This acquisition positions Trigg Minerals to explore and develop high-grade antimony and gold mineralisation in a region with a rich mining history and significant untapped potential.

Historical Significance

The Upper Hunter Goldfield has a rich history of gold production, with numerous historical workings and recorded high-grade output. The area also hosts several antimony occurrences, including a 12-metre adit sample assaying 37% Sb, suggesting potential mineralisation at depth. Rock chip samples have returned exceptionally high grades, including up to 1,045 g/t Au, highlighting the area’s high-grade potential. The Standard Reef mine confirms this with an estimated production of 15,000oz at 53.8 g/t Au. Gold and antimony in this underexplored region align with Trigg Minerals’ focus on high-value, strategically significant minerals.

Geological Setting

The Upper Hunter Goldfield is characterised by structurally controlled gold and antimony mineralisation hosted within metasedimentary and metavolcanic rocks. Mineralisation is typically associated with quartz veins emplaced along regional shear zones and fault structures, reflecting classic orogenic gold system architecture. Antimony, occurring mainly as stibnite, is commonly found within or adjacent to these structures, suggesting a linked mineralising system. The combination of favourable host rocks, established structural pathways, and high-grade historical assays underscores the strong geological potential of this underexplored field.

Exploration Potential

Despite its rich mining history, the Upper Hunter region remains underexplored with modern techniques. Trigg Minerals plans to implement a systematic exploration program, including geological mapping, geophysical surveys, and geochemical sampling, to delineate new zones of mineralisation. The company’s approach aims to unlock the full potential of the Upper Hunter Antimony-Gold Project by leveraging historical data and applying contemporary exploration methodologies.