Trigg Minerals (ASX: TMG) has announced bonanza grades from a systematic Phase 2 rock chip and channel sampling program at its Antimony Canyon project in Utah.
A total of 104 samples returned grades of 29.4% antimony from the Little Emma prospect, 25.24% antimony from the Pluto Workings, and 17.94% antimony from the Gem Mine zone.
Multiple other samples across the project area exceeded 1% antimony.
New High-Grade Zone
Rock chip sampling identified a substantial new zone of high-grade antimony, extending the mineralisation 1 kilometre north of the core project area.
Best grades included 3.59%, 2.62%, 2.38%, and 2.18%, coinciding with the extension of a coherent conductor visible in geophysical data extending north-to-northwest from Little Emma to Gem.
Mineralisation in the Northern Extension zone is interpreted to be controlled by splays of the regional Paunsaugunt Fault, creating a significant new search area along strike.
‘Salt n Pepper’ Tuff
The bonanza-grade stibnite mineralisation is closely associated with a specific, mappable sandstone tuff horizon (also called the ‘Salt n Pepper’ tuff) at the Gem mine.
It is thought to be the same horizon identified in Trigg’s initial investigation, where the mineralisation appears as stibnite veins, veinlets, and patches often associated with gypsum, iron oxides, and argillic alteration.
Systematic channel sampling of the horizon yielded an average grade of 3.07% antimony and confirmed the presence of a robust and high-grade mineralised body.
Undeveloped Antimony System
Managing director Andre Booyzen said the results show that Antimony Canyon remains one of the most important undeveloped high-grade antimony systems in the US.
“Bonanza grades of 29% antimony is a fantastic outcome that confirms the high grades reported in our first program are not isolated incidents, but part of a robust mineralising system,” he said.
“The discovery of high-grade mineralisation a full kilometre to the north is also a game-changer that supports our district-scale exploration model and indicates that the mineralising system is much more widespread than the historic footprint implies.”
He said rock chip and channel sampling had marked a significant breakthrough in understanding the geological controls on mineralisation at Antimony Canyon.
