Eagle Mountain Mining Limited (ASX: EM2) has reported significant high-grade assay results from its Silver Mountain Project in Arizona, USA, highlighting the project’s potential for porphyry and porphyry-related mineralisation.
The recent fieldwork has uncovered promising high-grade zones that could indicate a buried porphyry system.
Key Highlights
- High-Grade Assay Results: The assays revealed notable concentrations, including 64 g/t gold, 445 g/t silver, and 15 per cent lead over a 0.5-metre vein, and 30.4 g/t gold over a 0.2-metre breccia zone. Additional samples showed 11.65 g/t gold, 67 g/t silver, and 3 per cent lead from a grab sample, and 7.46 g/t gold and 181 g/t silver from another grab sample.
- Porphyry Potential: New mapping and sampling have identified high-grade zones with phyllic alteration and structural orientations that suggest the presence of a porphyry system. The project is strategically located along a kilometre-long trend connecting historical mines, with mineralisation open along strike and at depth.
- Supporting Data: Elevated levels of uranium, thorium, and rare earth elements were also identified, indicating potential for a U/Th/REE system at depth. Notable results include 567 ppm uranium oxide and 2,276 ppm thorium oxide, along with 2,024 ppm total rare earth oxides.
Tim Mason, CEO of Eagle Mountain Mining, expressed enthusiasm about the findings: “We are excited to be discovering a stable of high-quality targets within this underexplored, world-class mining jurisdiction.
“These targets are supported by the discovery of high-grade gold and silver-rich zones along significant geological trends. Sampling and mapping results suggest the high-grade features could be porphyry-related mineralisation.”
Silver Mountain is situated on the Laramide Arc, a geological feature known for world-class porphyry copper mines like Bagdad and Miami.
The project also lies on a prospective metallogenic belt hosting historical mines such as United Verde and Iron King.
Recent field programs have identified mineralised quartz veins and breccias, along with further porphyry alteration, supporting previously defined targets.
Eagle Mountain plans to conduct further fieldwork to determine the extent of mineralisation and alteration.
Future efforts will focus on structures impacting mineralisation, such as the Silver Dollar-Gold Hill and Colossal trends.
A soil sampling program is also planned to establish the lateral extent of alteration zones, alongside additional geophysical processing to create inversion models for magnetic data.
The Silver Mountain Project continues to exceed expectations and remains a top priority in Eagle Mountain’s exploration strategy, promising significant potential for future development in Arizona’s rich mining landscape.